formulasearchengine - User contributions [en]

Logistic function

2014-12-30T13:17:17Z

128.40.164.44: /* Mathematical properties */

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Liénard–Wiechert potential

2014-02-10T16:58:40Z

128.40.255.154: /* Existence */

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Feature scaling

2013-11-25T13:55:52Z

128.40.255.154: /* Rescaling */

An '''attractor network''' is a type of recurrent [[dynamical system|dynamical]] [[network science|network]], that evolves toward a stable pattern over time. Nodes in the attractor network converge toward a pattern that may either be fixed-point (a single state), cyclic (with regularly recurring states), [[chaos theory|chaotic]] (locally but not globally unstable) or random ([[stochastic]]).<ref name="amit">*{{cite book | author=Amit, D. J. | title=Modeling brain function: The world of attractor neural networks | publisher=New York, NY: Cambridge University Press | year=1989}}</ref> Attractor networks have largely been used in [[computational neuroscience]] to model neuronal processes such as associative memory<ref name="poucet">*{{cite journal | author=Poucet, B. and Save, E.| title= Attractors in Memory | journal=Science | year=2005 | volume=308 | pages=799–800| doi= 10.1126/science.1112555}}</ref> and motor behavior, as well as in [[bio-inspired computing|biologically inspired]] methods of machine learning.
An attractor network contains a set of ''n'' nodes, which can be represented as vectors in a ''d''-dimensional space where ''n''>''d''. Over time, the network state tends toward one of a set of predefined states on a ''d''-manifold; these are the [[attractor]]s.

==Overview==
{{See also|Attractor}}
In attractor networks, an ''attractor'' (or ''attracting set'') is a closed subset of states ''A'' toward which the system of nodes evolves. A stationary attractor is a state or sets of states where the global dynamics of the network stabilize. Cyclic attractors evolve the network toward a set of states in a [[limit cycle]], which is repeatedly traversed. Chaotic attractors are non-repeating bounded attractors that are continuously traversed.

The network state space is the set of all possible node states. The attractor space is the set of nodes on the attractor.
Attractor networks are initialized based on the input pattern. The dimensionality of the input pattern may differ from the dimensionality of the network nodes. The ''trajectory'' of the network consists of the set of states along the evolution path as the network converges toward the attractor state. The ''basin of attraction'' is the set of states that results in movement towards a certain attractor.<ref name="amit"/>

==Types==
Various types of attractors may be used to model different types of network dynamics. While fixed-point attractor networks are the most common (originating from [[Hopfield networks]]<ref name="hopfield">*{{cite journal | author=Hopfield, J. J.| title= Neural networks and physical systems with emergent collective computational abilities | journal=Proceedings of the National Academy of Sciences | year=1982 | volume=79 | pages=2554–2558 | doi=10.1073/pnas.79.8.2554 | pmid=6953413 | pmc=346238}}</ref>), other types of networks are also examined.

===Fixed point attractors===
The fixed point attractor naturally follows from the [[Hopfield network]]. Conventionally, fixed points in this model represent encoded memories. These models have been used to explain associative memory, classification, and pattern completion. Hopfield nets contain an underlying [[Lyapunov function|energy function]]<ref name="shopfield">*{{Scholarpedia|title=Hopfield network|curator=John Hopfield|urlname= Hopfield_network}}</ref> that allow the network to asymptotically approach a stationary state. One class of point attractor network is initialized with an input, after which the input is removed and the network moves toward a stable state. Another class of attractor network features predefined weights that are probed by different types of input. If this stable state is different during and after the input, it serves as a model of associative memory. However, if the states during and after input do not differ, the network can be used for pattern completion.

===Other stationary attractors===
Line attractors and plane attractors are used in the study of oculomotor control. These line attractors, or ''neural integrators'', describe eye position in response to stimuli. Ring attractors have been used to model rodent head direction.

===Cyclic attractors===
Cyclic attractors are instrumental in modelling [[central pattern generator]]s, neurons that govern oscillatory activity in animals such as chewing, walking, and breathing.

===Chaotic attractors===
Chaotic attractors (also called ''strange attractors'') have been hypothesized to reflect patterns in odor recognition. While chaotic attractors have the benefit of more quickly converging upon limit cycles, there is yet no experimental evidence to support this theory.<ref name="attractor">*{{Scholarpedia|title=Attractor network|curator=Chris Eliasmith|urlname=Attractor_network}}</ref>

==Implementations==
Attractor networks have mainly been implemented as memory models using fixed-point attractors. However, they have been largely impractical for computational purposes because of difficulties in designing the attractor landscape and network wiring, resulting in spurious attractors and poorly conditioned basins of attraction. Furthermore, training on attractor networks is generally computationally expensive, compared to other methods such as [[k-nearest neighbor]] classifiers.<ref name="zemel">*{{cite journal | author=Zemel, R. and Mozer, M.| title= Localist attractor networks | journal=Neural Computation | year=2001 | volume=13 | pages=1045–1064}}</ref>

===Hopfield Networks===
{{See also|Hopfield network}}
Hopfield attractor networks are an early implementation of attractor networks with associative memory. These recurrent networks are initialized by the input, and tend toward a fixed-point attractor. The update function in discrete time is <math>x(t+1)=f(Wx(t))</math>, where <math>x</math> is a vector of nodes in the network and <math>W</math> is a symmetric matrix describing their connectivity. The continuous time update is <math>\frac{dx}{dt}=-\lambda x+f(Wx)</math>.

''[[Bidirectional associative memory|Bidirectional networks]]'' are similar to Hopfield networks, with the special case that the matrix <math>W</math> is a [[block matrix]].<ref name="shopfield"/>

===Localist Attractor Networks===
Zemel and Mozer (2001)<ref name="zemel"/> proposed a method to reduce the number of spurious attractors that arise from the encoding of multiple attractors by each connection in the network. Localist attractor networks encode knowledge locally by implementing an [[expectation-maximization]] algorithm on a [[mixture model|mixture-of-gaussians]] representing the attractors, to minimize the free energy in the network and converge only the most relevant attractor. This results in the following update equations:
#Determine the activity of attractors: <math>q_i(t)=\frac{\pi_i(y(t),w_i,\sigma(t))}{\sum_j\pi_jg(y(t),w_j,\sigma(t))}</math>
#Determine the next state of the network: <math>y(t+1)=\alpha(t)\xi+(1-\alpha(t))\sum_iq_i(t)w_i\,\!</math>
#Determine the attractor width through network: <math>\sigma^2_y(t)=\frac{1}{n}\sum_iq_i(t)|y(t)-w_i|^2</math>
(<math>\pi_i</math> denotes basin strength, <math>w_i</math> denotes the center of the basin. <math>\xi</math> denotes input to the net.)

The network is then re-observed, and the above steps repeat until convergence. The model also reflects two biologically relevant concepts. The change in <math>\alpha</math> models stimulus ''[[Priming (psychology)|priming]]'' by allowing quicker convergence toward a recently visited attractor. Furthermore, the summed activity of attractors allows a ''gang effect'' that causes two nearby attractors to mutually reinforce the other's basin.

===Reconsolidation Attractor Networks===
Siegelmann (2008)<ref name="siegelmann">*{{cite journal | author=Siegelmann, H. T.| title= Analog-symbolic memory that tracks via reconsolidation | journal=Physica D| year=2008 | volume=237 | pages=1207–1214}}</ref> generalized the localist attractor network model to include the tuning of attractors themselves. This algorithm uses the EM method above, with the following modifications: (1) early termination of the algorithm when the attractor's activity is most distributed, or when high entropy suggests a need for additional memories, and (2) the ability to update the attractors themselves: <math>w_i(t+1)=vq_i(t)\cdot y(t)+[1-vq_i(t)]\cdot w_i(t)\,\!</math>, where <math>v</math> is the step size parameter of the change of <math>w_i</math>. This model reflects [[memory reconsolidation]] in animals, and shows some of the same dynamics as those found in memory experiments.

Further developments in attractor networks, such as [[kernel trick|kernel]] based attractor networks,<ref>*{{cite journal | author=Nowicki, D., Siegelmann, H.T.| title= Flexible Kernel Memory | journal=PLoS ONE | year=2010 | volume=5 | issue=6|pages=e10955}}</ref> have improved the computational feasibility of attractor networks as a learning algorithm, while maintaining the high-level flexibility to perform pattern completion on complex compositional structures.

==References==
{{Reflist}}

[[Category:Networks]]

Langmuir (unit)

2013-08-02T13:43:10Z

128.40.76.3: /* Definition */

A '''Pierpont prime''' is a [[prime number]] of the form <big>     2''u''3''v'' + 1</big> for some nonnegative [[integer]]s ''u'' and ''v''. That is, they are the prime numbers ''p'' for which ''p'' − 1 is [[Smooth number|3-smooth]]. They are named after the mathematician [[James Pierpont (mathematician)|James Pierpont]].

It is possible to prove that if ''v'' = 0 and ''u'' > 0, then ''u'' must be a power of 2, making the prime a [[Fermat prime]]. If ''v'' is [[Positive number|positive]] then ''u'' must also be positive, and the Pierpont prime is of the form 6''k'' + 1 (because if ''u'' = 0 and ''v'' > 0 then 2''u''3''v'' + 1 is an even number greater than 2 and therefore composite).

The first few Pierpont primes are:

:[[2 (number)|2]], [[3 (number)|3]], [[5 (number)|5]], [[7 (number)|7]], [[13 (number)|13]], [[17 (number)|17]], [[19 (number)|19]], [[37 (number)|37]], [[73 (number)|73]], [[97 (number)|97]], [[109 (number)|109]], [[163 (number)|163]], [[193 (number)|193]], [[257 (number)|257]], [[433 (number)|433]], 487, 577, 769, 1153, 1297, 1459, 2593, 2917, 3457, 3889, 10369, 12289, 17497, 18433, 39367, 52489, 65537, 139969, 147457, 209953, 331777, 472393, 629857, 746497, 786433, 839809, 995329. {{OEIS|id=A005109}}

== Distribution of Pierpont primes ==
[[Image:Pierpont_exponent_distribution.png|thumb|Distribution of the exponents for the smaller Pierpont primes]] [[Andrew Gleason]] conjectured there are infinitely many Pierpont primes. They are not particularly rare and there are few restrictions from algebraic factorisations, so there are no requirements like the [[Mersenne prime]] condition that the exponent must be prime. There are 36 Pierpont primes less than 106, 59 less than 109, 151 less than 1020, and 789 less than 10100; conjecturally there are O(log ''N'') Pierpont primes smaller than ''N'', as opposed to the conjectured O(log log ''N'') Mersenne primes in that range.

== Pierpont primes found as factors of Fermat numbers ==

As part of the ongoing worldwide search for factors of [[Fermat number]]s, some Pierpont primes have been announced as factors. The following table<ref>Wilfrid Keller, [http://www.prothsearch.net/fermat.html Fermat factoring status].</ref> gives values of ''m'', ''k'', and ''n'' such that

:<math>k\cdot 2^n + 1\text{ divides }2^{2^m} + 1. \, </math>

The left-hand side is a Pierpont prime when ''k'' is a [[Perfect power|power]] of 3; the right-hand side is a Fermat number.

{| class="wikitable"
|+
!''m'' !!''k''!! ''n'' !! Year !! Discoverer
|-
|38 || 3 || 41 || 1903 || [[James Cullen (mathematician)|Cullen]], [[Allan Joseph Champneys Cunningham|Cunningham]] & Western
|-
|63 || 9 || 67 || 1956 || [[Raphael M. Robinson|Robinson]]
|-
|207 || 3 || 209 || 1956 || Robinson
|-
|452 || 27 || 455 || 1956 || Robinson
|-
|9428 || 9 || 9431 || 1983 || Keller
|-
|12185 || 81 || 12189 || 1993 || [[Harvey Dubner|Dubner]]
|-
|28281 || 81 || 28285 || 1996 || Taura
|-
|157167 || 3 || 157169 || 1995 || Young
|-
|213319 || 3 || 213321 || 1996 || Young
|-
|303088 || 3 || 303093 || 1998 || Young
|-
|382447 || 3 || 382449 || 1999 || [[John B. Cosgrave|Cosgrave]] & Gallot
|-
|461076 || 9 || 461081 || 2003 || Nohara, Jobling, [[George Woltman|Woltman]] & Gallot
|-
|672005 || 27 || 672007 || 2005 || [[Curtis Cooper (mathematician)|Cooper]], Jobling, Woltman & Gallot
|-
|2145351 || 3 || 2145353 || 2003 || Cosgrave, Jobling, Woltman & Gallot
|-
|2478782 || 3 || 2478785 || 2003 || Cosgrave, Jobling, Woltman & Gallot
|}

{{As of|2011}}, the largest known Pierpont prime is 3 × 27033641 + 1,<ref>Chris Caldwell, [http://primes.utm.edu/primes/lists/short.txt The largest known primes] at The [[Prime Pages]].</ref> whose primality was discovered by Michael Herder in 2011.

In the [[mathematics of paper folding]], the [[Huzita–Hatori axioms|Huzita axioms]] define six of the seven types of fold possible. It has been shown that these folds are sufficient to allow any [[regular polygon]] of ''N'' sides to be formed, as long as ''N'' > 3 and of the form 2''m''3''n''ρ, where ρ is a product of distinct Pierpont primes. This is the same class of regular polygons as those that can be constructed with a compass, straightedge, and angle-trisector. Regular polygons which can be constructed with only compass and straightedge ([[constructible polygon]]s) are the special case where ''n'' = 0 and ρ is a product of distinct [[Fermat prime]]s, themselves a subset of Pierpont primes.

The smallest prime that is not a Pierpont (or Fermat) prime is 11, therefore the [[hendecagon]] is the smallest regular polygon that cannot be constructed with compass, straightedge and angle trisector. All other regular ''n''-gons with 3≤''n''≤21 can be constructed with compass, straightedge and trisector (if needed).

== Notes ==
{{Reflist}}

== References ==
*{{MathWorld|title=Pierpont Prime|urlname=PierpontPrime}}

{{Prime number classes|state=collapsed}}

[[Category:Classes of prime numbers]]

Iterative proportional fitting

2013-07-16T15:04:29Z

128.40.47.76: Corrected typo 'e.i.' to 'i.e.'

{|width=25% class="wikitable" style="float:right; font-size: 90%; text-align: left;"
!colspan=2|<center>'''[[Mersin İdmanyurdu]] SK''' [[Mersin]], [[Turkey]]
|-
!colspan=2 align=center | <big>MİY 1980–81</big>
|-
!colspan=2 align=center | '''[[Mersin İdmanyurdu#League participations|Season]]: [[Turkish First Football League|First League]] [[1980–81 Turkish First Football League|1980–81]]'''
|-
|'''League position:''' || 15th (Relegated)
|-
|'''[[Turkish Cup]]:''' || Eliminated at QF
|-
|'''Top goal scorers:''' ||
|-
|'''President:''' ||
|-
|'''Coach:''' ||{{flagicon|TUR}} [[İsmet Arıkan]]
|-
! colspan=1 | <math> \leftarrow </math> Previous season [[1979–80 Mersin İdmanyurdu season|1979–80]] !! Next season <math> \rightarrow </math> [[1981–82 Mersin İdmanyurdu season|1981–82]]
|}

The [[1980–81 Turkish First Football League|1980–81]] season was the 10th season of [[Mersin İdmanyurdu]] (MİY) [[association football|football]] team in [[Turkish First Football League|First League]], the first level division in [[Turkey]]. They have relegated to second division at the end of the season. It was third time the team relegated. The club signed with coach İsmet Arıkan. Arıkan's assistant was conditioner Seyfi Alanya.

==1980–81 league participation==
The [[1980–81 Turkish First Football League|1980–81]] season was the 23rd season of [[Turkish First Football League|First League]]. The league was played with 16 teams and last three teams were relegated to [[Turkish Second Football League|Second League]] [[1981–82 Turkish Second Football League|1981–82]]. [[Mersin İdmanyurdu]] finished 15th [[1980–81 Turkish First Football League|First League 1980–81]] season and relegated to second division.

Mersin İdmanyurdu has become the only team in the history of [[Süper Lig|Turkish first level football league]], whose points were deleted. In 1980–81 season the team has drawn away from the field in [[Beşiktaş J.K.|Beşiktaş]] game. For that reason [[Turkey Football Federation|TFF]] decided to award the match to Beşiktaş by 3-0 and delete two extra points of MİY.<ref>See "Ligin rekorları ve ilkleri" in Turkish [http://arama.hurriyet.com.tr/arsivnews.aspx?id=12209113 Hürriyet]</ref> MİY finished season with 21 points at 15th place, 6 points back of 14th team.

At the end of first half MİY became the most violent team with 3 red cards, Tahir, Mücellip, Ali. Mehmet Şilan, Kazım and Osman were one match suspended players due to yellow card penalties.

===League table===
Mersin İY's league performance in [[Turkish First Football League|Turkey First League]] in [[1980–81 Turkish First Football League|1980–81]] season is shown in the following table.<ref>See Turkey - Final Tables [http://www.rsssf.com/tablest/turkhist.html Erdinç Sivritepe and RSSSF]</ref><ref>Weekly data from [http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-30--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_2FFHCNdspi4%3d_3G1e6GAvw0Y%3d,MatchType.aspx Futbol merkezi]</ref>
{| class="wikitable" style="text-align: center;"
!rowspan=2|place
!rowspan=2|team
!colspan=4|games
!colspan=2|goals
!rowspan=2|points
!rowspan=2|
!colspan=3|home
!rowspan=2|
!colspan=3|away
|-
! P
! W
! D
! L
! F
! A
! F-A
! week
! plc
! F-A
! week
! plc
|-
|bgcolor="#ACE1AF"|1||align="left" bgcolor="#ACE1AF"|{{legend3|#800000}}{{legend3|#0070FF}} '''[[Trabzonspor]]'''||bgcolor="#ACE1AF"|30||bgcolor="#ACE1AF"|16||bgcolor="#ACE1AF"|7||bgcolor="#ACE1AF"|7||bgcolor="#ACE1AF"|41 ||bgcolor="#ACE1AF"|21||bgcolor="#ACE1AF"|'''39'''||bgcolor="#ACE1AF"| ||bgcolor="#ACE1AF"|'''0-0'''||bgcolor="#ACE1AF"|[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-03--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_xdSW5iIXegw%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''3''']||bgcolor="#ACE1AF"|11||bgcolor="#ACE1AF"| ||bgcolor="#ACE1AF"|'''0-3'''||bgcolor="#ACE1AF"|[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-18--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_x3JlkJfSFMMFy4%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''18''']||bgcolor="#ACE1AF"|15
|-
|bgcolor="#BBEBFF"|2||align="left" bgcolor="#BBEBFF"|{{legend3|#FF7F00}}{{legend3|#FFFFFF}} '''[[Adanaspor]]'''||bgcolor="#BBEBFF"|30||bgcolor="#BBEBFF"|13||bgcolor="#BBEBFF"|8||bgcolor="#BBEBFF"|9||bgcolor="#BBEBFF"|36 ||bgcolor="#BBEBFF"|28||bgcolor="#BBEBFF"|'''34'''||bgcolor="#BBEBFF"| ||bgcolor="#BBEBFF"|'''2-2'''||bgcolor="#BBEBFF"|[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-28--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_c7YYzVkeKbg%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''28''']||bgcolor="#BBEBFF"|15||bgcolor="#BBEBFF"| ||bgcolor="#BBEBFF"|'''0-1'''||bgcolor="#BBEBFF"|[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-11--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_hJ8roA4Z3E8%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''11''']||bgcolor="#BBEBFF"|11
|-
||3||align="left"|{{legend3|#FFFF00}}{{legend3|#FF0000}} '''[[Galatasaray S.K. (football team)|Galatasaray]]'''||30||13||8||9||28||25||'''34'''|| ||'''0-1'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-05--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_1GMXISYy7vM%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''5''']||10|| ||'''0-0'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-22--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_S5ugpvsBHfE%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''22''']||15
|-
||4||align="left"|{{legend3|#FF0000}}{{legend3|#000000}} '''[[Gaziantepspor]]'''||30||12||9||9||23||22||'''33'''|| ||'''0-0'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-07--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_EE6nJ6GZeqA%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''7''']||9|| ||'''0-1'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-24--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_91p1dX737f0%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''24''']||15
|-
||5||align="left"|{{legend3|#000000}}{{legend3|#FFFFFF}} '''[[Beşiktaş J.K.|Beşiktaş]]'''||30||12||7||11||27||23||'''31'''|| ||'''0-1'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-17--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_3UydsA%2bKpbY%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''17''']||15|| ||'''0-3'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-02--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_6zdVaC5nZ2U%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''2''']||11
|-
||6||align="left"|{{legend3|#FF0000}}{{legend3|#000000}} '''[[Eskişehirspor]]'''||30||10||11||9||19||19||'''31'''|| ||'''0-2'''||[http://www.futbolmerkezi.com/ '''29''']||15|| ||'''0-2'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-12--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_9y4UoAAwcbA%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''12''']||13
|-
||7||align="left"|{{legend3|#FF0000}}{{legend3|#000080}} '''[[Zonguldakspor]]'''||30||12||6||12||36||33||'''30'''|| ||'''2-0'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-04--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_jW1uLs8xYKQ%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''4''']||6|| ||'''0-2'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-20--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_qdshC%2bqTiL4%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''20''']||16
|-
||8||align="left"|{{legend3|#008000}}{{legend3|#000000}} '''[[Kocaelispor]]'''||30||11||8||11||34||32||'''30'''|| ||'''3-1'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-01--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_A7vJjaOFbWw%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''1''']||3|| ||'''2-3''' ||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-16--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_Okfc6PEGZys%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''16''']||14
|-
||9||align="left"|{{legend3|#008000}}{{legend3|#FFFFFF}} '''[[Bursaspor]]'''||30||12||6||12||30||30||'''30'''|| ||'''1-0'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-13--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_iQqiDuWfacw%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''13''']||11|| ||'''0-1'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-30--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_2FFHCNdspi4%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''30''']||15
|-
||10||align="left"|{{legend3|#FFFF00}}{{legend3|#000080}} '''[[Fenerbahçe S.K.|Fenerbahçe]]'''||30||9||11||10||31||27||'''29'''|| ||'''1-1'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-09--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_ZC%2bKcO1qXpY%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''9''']||11|| ||'''1-1'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-26--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_xEleaPhDIwM%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''26''']||15
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||11||align="left"|{{legend3|#000000}}{{legend3|#FFFFFF}} '''[[Altay S.K.|Altay]]'''||30||8||13||9||29||30||'''29'''|| ||'''2-0'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-19--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_sqqK2KpAHQQ%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''19''']||15|| ||'''0-3'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-14--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_Ybf2p1ec2iA%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''14''']||14
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||12||align="left"|{{legend3|#000080}}{{legend3|#0070FF}} '''[[Adana Demirspor]]'''||30||11||7||12||25||26||'''29'''|| ||'''1-0'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-23--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_uap3mxTKE4Y%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''23''']||15|| ||'''1-2'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-06--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_XpQ%2blJgbTkI%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''6''']||11
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||13||align="left"|{{legend3|#FF0000}}{{legend3|#FFFFFF}} '''[[Boluspor]]'''||30||9||11||10||32||36||'''29'''|| ||'''1-0'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-10--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_4C86dsyayUo%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''10''']||9|| ||'''1-1'''||[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-27--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_0da0%2blrrxaA%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''27''']||15
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|bgcolor="#FFBBBB"|14||align="left" bgcolor="#FFBBBB"|{{legend3|#0000FF}}{{legend3|#008000}} '''[[Çaykur Rizespor|Rizespor]]'''||bgcolor="#FFBBBB"|30||bgcolor="#FFBBBB"|11||bgcolor="#FFBBBB"|7||bgcolor="#FFBBBB"|12||bgcolor="#FFBBBB"|35 ||bgcolor="#FFBBBB"|42||bgcolor="#FFBBBB"|'''29'''||bgcolor="#FFBBBB"| ||bgcolor="#FFBBBB"|'''2-1'''||bgcolor="#FFBBBB"|[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-25--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_m1TzKUkjruw%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''25''']||bgcolor="#FFBBBB"|15||bgcolor="#FFBBBB"| ||bgcolor="#FFBBBB"|'''0-1'''||bgcolor="#FFBBBB"|[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-08--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_PyoBeyWgtHs%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''8''']||bgcolor="#FFBBBB"|11
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|bgcolor="#333399" style="color:red;"|15||align="left" bgcolor="#333399" style="color:red;"|{{legend3|#FF0000}}{{legend3|#00008B}} '''Mersin İdmanyurdu'''||bgcolor="#333399" style="color:red;"|30||bgcolor="#333399" style="color:red;"|8||bgcolor="#333399" style="color:red;"|7||bgcolor="#333399" style="color:red;"|15||bgcolor="#333399" style="color:red;"|21||bgcolor="#333399" style="color:red;"|34||bgcolor="#333399" style="color:red;"|'''21'''<ref>Team's two points were deleted upon the withdrawing of the team in Beşiktaş game in İstanbul. See "Ligin rekorları ve ilkleri" in Turkish [http://arama.hurriyet.com.tr/arsivnews.aspx?id=12209113 Hürriyet]</ref>||bgcolor="#333399" style="color:red;"| ||bgcolor="#333399" style="color:red;"| ||bgcolor="#333399" style="color:red;"| ||bgcolor="#333399" style="color:red;"| ||bgcolor="#333399" style="color:red;"| ||bgcolor="#333399" style="color:red;"| ||bgcolor="#333399" style="color:red;"| ||bgcolor="#333399" style="color:red;"|
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|bgcolor="#FFBBBB"|16||align="left" bgcolor="#FFBBBB"|{{legend3|#8601AF}}{{legend3|#FFFFFF}} '''[[Orduspor]]'''||bgcolor="#FFBBBB"|30||bgcolor="#FFBBBB"|8||bgcolor="#FFBBBB"|4||bgcolor="#FFBBBB"|18||bgcolor="#FFBBBB"|19 ||bgcolor="#FFBBBB"|38||bgcolor="#FFBBBB"|'''20'''||bgcolor="#FFBBBB"| ||bgcolor="#FFBBBB"|'''1-0'''||bgcolor="#FFBBBB"|[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-21--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_8Xh3pRRYDKY%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''21''']||bgcolor="#FFBBBB"|15||bgcolor="#FFBBBB"| ||bgcolor="#FFBBBB"|'''0-1'''||bgcolor="#FFBBBB"|[http://www.futbolmerkezi.com/1980-1981-Turkiye-1--League-15--Week-Standings-And-Results_EN_s9bVeXBQOx0%3d_3FnIo4bOlso%3d_CdPp%2buwe05k%3d_3G1e6GAvw0Y%3d,MatchType.aspx '''15''']||bgcolor="#FFBBBB"|14
|}
Won, drawn and lost points are 2, 1 and 0. F belongs to MİY and A belongs to corresponding team for both home and away matches. Champions went to [[UEFA Champions League|ECC]] [[1981–82 European Cup|1981-82]], and runner-ups became eligible for [[UEFA Cup]] [[UEFA Cup 1983-84|1983-84]].

===First half===
* 01 - 24.08.1980 - MİY-Kocaelispor: 3-1. Sunday. Mersin. Referees: Yahya Diker, Tayfun Özcan, Asım Yazıcıoğlu. ''MİY'': Salih, Mustafa (Yusuf), İsmail, Tahir, Nasır, Levent, Mücellip, Feridun, Şilan (M.Ali), Özcan, Harun. Subs: Atıf, Kenan. Coach: İsmet Arıkan. Goals: Özcan 8', Feridun 47', Mücellip 55'. ''Kocaelispor'': Cumhur, Zeki, Kamil, Mahir, Gürbey, Ahmet, Baturman, Mustafa, Orhan, Güvenç, Halil. Subs: Halit, Veli, K.Halit, Ceyhun, Faik. Coach: Zeynel Soyuer. Goal: Mahir 16'.<ref>"Mersin İdman Yurdu beat Kocaelispor 3-1". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/08/25/ML19800825001101105.gif Mersin İdman Yurdu Kocaelispor'u 3-1 yendi]. Milliyet gazete arşivi, 25.08.1980, p. 11. Retrieved on 12.06.2010. {{tr icon}}</ref>
* 02 - 31.08.1980 - Beşiktaş-MİY: 3-0 (awarded score). Sunday, 17:00. İnönü Stadium, İstanbul. Weather: 27°C open, sunny. Attendance: 27.606. Referees: Sadık Deda, Nuri Bilgin, Baki Özcan. ''Beşiktaş'': Mustafa, Kemal, Ömer, B.Haluk, Süleyman, Ziya, Mehmet Ekşi, Serdar, Necdet, Akif, Fikret. Subs: Rasim, Bora, Ulvi, Samet, K.Haluk. Coach: Metin Türel. Goals: Mehmet Ekşi 29'(P), 51'(P), Ziya 62'. ''MİY'': Salih, Mehmet Ali, Tahir, İsmail, Nasır, Levent, Mücellip, Feridun, Özcan, Mehmet Şilan (Kazım), Harun. Subs: Atıf, Yusuf, Eyüp, Kenan. Coach: İsmet Arıkan.<ref>"Mersin has withdrawn from the field when Beşiktaş was leading 3-0".[http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/09/01/ML19800901001101207.gif Beşiktaş 3-0 galipken M. İd. Yurdu sahadan çekildi]. Milliyet gazete arşivi, 01.09.1980, p. 12. Retrieved on 05.09.2010. {{tr icon}}</ref> MİY coach İsmet Arıkan has withdrawn the team from the field as a protest to referee's decisions.
* 03 - 07.09.1980 - MİY-Trabzonspor: 0-0. Sunday. Weather: 24°C open and sunny. Mersin. Referees: Talat Tokat, Zekai Kunak, Hasan Güven. ''MİY'': Atıf, Yusuf, İsmail, Tahir, Nasır, Levent, M.Ali, Feridun, Mücellip, Özcan, Harun. Subs: Salih, Eyüp, Kenan, Şilan, Mustafa, Levent. Coach: İsmet Arıkan. ''Trabzonspor'': Şenol, Turgay, Necati, Hüsnü, Ahmet, Yaşar, K.Şenol, İskender, Sinan, Mustafa, Levent. Subs: Ali, Arif, İbrahim, Faruk. Coach: Özkan Sümer was in Poland for European Cup. Team was managed by Ergun Kantarcı.<ref>"Trabzonspor retuns from Mersin İd.Y. match with one point: 0-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/09/08/ML19800908001100913.gif Trabzonspor, Mersin İd.Y. deplasmanından bir puanla dönüyot: 0-0.]. Milliyet gazete arşivi, 08.09.1980, p. 9. Retrieved on 08.12.2010. {{7tr icon}}</ref>
* 04 - 27.09.1980 - MİY-Zonguldaspor: 2-0. Sunday. Weather: 26°C open and sunny. Referees: Erdoğan Albay, Ali İrfan Ata, Sina Özcan. ''MİY'': Atıf, Yusuf, Tahir, Nasır, İsmail, Levent, Özcan (Necat), Feridun, Mücellip, Şiran (M.Ali), Harun. Subs: Salih, Eyüp, Osman. Coach: İsmet Arıkan. Goals: Mücellip 20', 26'. ''Zonguldakspor'': Birol, Savaş, Muammer, Turgut, Hüseyin, Hamdi, Fuat (Ercan), Ersoy (Tuğrul), Hamit, Kemal, Günay. Sub: Rasin. Coach: Candan Tarhan.<ref>"M.İd.Yurdu beat leader Zonguldak: 2-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/09/28/ML19800928001100913.gif M.İd.Yurdu lider Zonguldak'ı yendi: 2-0]. Milliyet gazete arşivi, 28.09.1980, p. 9. Retrieved on 12.06.2010. {{tr icon}}</ref>
* 05 - 19.10.1980 - MİY-Galatasaray: 0-1. Sunday, 15:00. Mersin.
* 06 - 26.10.1980 - Adana Demirspor-MİY: 2-1. Sunday. Adana. Referees: Celal Türk, Mustafa Taşkın, İsmail Irmak. ''Adana Demirspor'': İzzet, Hüseyin, Savaş, İlyas, K.Orhan (Necmettin), Burhan, Eren, B.Orhan, Adnan, Hasan, Nevzat. Goals: Hasan 37', Hasan 66'. Subs: Hasan, Bilbay, İbrahim, Mehmet. Coach: Doğan Emültay. ''MİY'': Salih, Yusuf, İsmail, Osman, Eyüp, Levent, M.Ali, Feridun, Mücellip, Özcan, Harun. Subs: Özcan, Nasır, Nejat, Kazım, Mustafa. Coach: İsmet Arıkan. Goal: Harun 22'.<ref>"Adana D.Spor sent Mersin İd. Yurdu pointless: 2-1". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/10/27/ML19801027001101011.gif Adana D.Spor Mersin İd. Yurdu'nu puansız gönderdi: 2-1]. Milliyet gazete arşivi, 27.10.1980, p. 10. Retrieved on 12.06.2010. {{tr icon}}</ref>
* 07 - 02.11.1980 - MİY-Gaziantepspor: 0-0. Sunday. Weather: 21°C open. Referees: Nihat Özbirgül, Atilla Köşel, Zekai Kunat. ''MİY'': Salih, Yusuf, Osman, Eyüp, İsmail, Raşit, Özcan, Levent, Mehmet Ali, Şiran, Harun. Subs: Özcan, Feridun, Nejat, Mustafa. Coach: İsmet Arıkan. Yellow card: M.Ali, Şiran, Özcan. ''Gaziantepspor'': Yaşar, Nurettin, Fatih, Hayri, Ünsal, Reşit, Murat, Tuğrul, B.Hüseyin, Ahmet, Sami, Erdal. Subs: Cemal, Nihat, Müjdat, Hakan. Coach: Refik Özvardar. Yellow cards: Ahmet, Fatih, Hayri, Ünsal.<ref>"Gaziantepspor drawn with M.İ.Y. goalless: 0-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/11/03/ML19801103001101122.gif Gaziantepspor M.İ.Y. ile gosüz berabere kaldı: 0-0]. Milliyet gazete arşivi, 03.11.1980, p. 11. Retrieved on 12.06.2010. {{tr icon}}</ref>
* 08 - 09.11.1980 - Rizespor-MİY: 1-0. Rize. Referees: Teoman Parel, İbrahim Karaoğlu, Adnan Doğru. ''Rizespor'': Bahattin, Erol, Hüsnü, Yaşar, Oktay, Müfit, Osman, Arif, Hüseyin, Zafer, K.Oktay. Subs: K.Sinan, Kahraman, Muharrem, K.Osman. Coach: Nevzat Soyluoğlu. Goal: Hüseyin 80'. ''MİY'': Salih, Mustafa, Osman, İsmail, Övünç, Levent, Harun, Özcan, M.Ali, Mücellip, Raşit. Subs: Kazım, Yusuf, Necat, K.Özcan, Kasım. Coach: İsmet Arıkan.<ref>"Rizespor-Mersin İd. Yurdu: 1-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/11/10/ML19801110001101006.gif Rizespor-Mersin İd. Yurdu: 1-0]. Milliyet gazete arşivi, 10.11.1980, p. 10. Retrieved on 27.10.2010. {{tr icon}}</ref>
* 09 - 16.11.1980 - MİY-Fenerbahçe: 1-1. Sunday. Weather: 26°C open sunny. Mersin. Referees: Yılmaz Önen, Mustafa Taşkın, Turan Özener. ''MİY'': Salih, Mustafa, Yusuf, Nasır (Eyüp), Osman, Harun, Özcan, Levent, Mehmet Ali, Mücellip, Raşit (Kazım). Subs: Özcan, İsmail, Nejat. Coach: İsmet Arıkan. Goal: Mücellip. Yellow cards: Osman, M.Ali. Red card: M.Ali. ''Fenerbahçe'': Adem (Fikret), Onur, Erol, Alpaslan, Cem, Önder, Müjdat, Sedat, A.Kemal (Mustafa), Suat, Selçuk. Subs: İsa, Hasan, Mehmet. Coach: Friedl Rausch. Goal: A.Kemal. Yellow cards: Onur, A.Kemal. Red card: Onur.<ref>"Fenerbahçe could not save win and leadership in Mersin." [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/11/17/ML19801117001101202.gif Fenerbahçe, Mersin'de galibiyeti ve liderliği koruyamadı]. Milliyet gazete arşivi, 17.11.1980, p. 12. Retrieved on 02.10.2010. {{tr icon}}</ref>
* 10 - 23.11.1980 - MİY-Boluspor: 1-0. Sunday. Weather: 26°C open sunny. Mersin. Referees: Nihat Gülşen, İsmail Hakkı Bora, Hamit Baloğlu. ''MİY'': Salih, Mustafa, Yusuf, Eyüp, Osman, Harun, Özcan (Kazım), Levent, Mücellip, Şilan, Raşit. Subs: Ahmet, Necat, Reşit, İsmail. Coach: İsmet Arıkan. Goal: Mücellip 82'. ''Boluspor'': Çetin, B.İbrahim, Nuri, Alaattin, Erdem, K.İbrahim, Selahattin, Demir, B.Çetin, Halil İbrahim, Minas. Subs: İlker, Ahmet, Mehmet, Şahap, Şenol. Coach: Cahit Sinan.<ref>"Mersin-Bolu: 1-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/11/24/ML19801124001101109.gif Mersin-Bolu: 1-0]. Milliyet gazete arşivi, 24.11.1980, p. 11. Retrieved on 27.10.2010. {{tr icon}}</ref>
* 11 - 07.12.1980 - Adanaspor-MİY: 1-0. Sunday. Referees: Güngör Tuncel, Macit Aknam, Coşkun Güzelalan. ''Adanaspor'': Malik, Şevket, Timuçin, K.Mustafa, B.Mustafa, Suat, Selahattin, Ercan, Nihat, Bora, Kayhan. Subs: Ahmet, Necat, Sedat, Gani, Nevzat. Coach: Gündüz Tekin Onay. Goal: Bora: 88'. ''MİY'': Salih, Mustafa, Osman, Yusuf, İsmail, Mücellip, Mehmet Ali, Harun, Şiran, Özcan, Raşit. Subs: Ahmet, Eyüp, Kazım, Reşit, Levent. Coach: İsmet Arıkan.<ref>"Adanaspor beat Mersin İd. Yurdu: 1-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/12/08/ML19801208001101013.gif Adanaspor Mersin İd. Yurdu'nu yendi: 1-0]. Milliyet gazete arşivi, 08.12.1980, p. 10. Retrieved on 12.06.2010. {{tr icon}}</ref>
* 12 - 14.12.1980 - Eskişehirspor-MİY: 2-0. Sunday, 13:45. Eskişehir.
* 13 - 21.12.1980 - MİY-Bursaspor: 1-0. Sunday. Weather: 16°C open. Mersin. Referees: Talat Tokat, Bayram Can, Mehmet Arıman. ''MİY'': Salih, Mustafa, Yusuf, İsmail, Osman, Nevruz, Mücellip, Levent, Feridun, Şilan, Harun. Bench: K. Ahmet, Kenan, Özcan, Kazım, Raşit. Coach: İsmet Arıkan. Goal: Mücellip 34'. ''Bursaspor'': Alptuğ, Sedat II, Erdinç, Sinan, Özer, Recai, Sedat III, Mustafa, Kadir, Ahmet, Muzaffer. Subs: Aslan, K.Mehmet, İsmail, Beyhan, Altan. Coach: Fethi Demircan.<ref>"Mersin İd. Yurdu-Bursa: 1-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/12/22/ML19801222001101104.gif Mersin İd. Yurdu-Bursa: 1-0]. Milliyet gazete arşivi, 22.12.1980, p. 11. Retrieved on 12.06.2010. {{tr icon}}</ref>
* 14 - 28.12.1980 - Altay-MİY: 3-0. Sunday. İzmir. Referees: Nihat Güner, Zihni Alemdar, Bilgin İnce. ''Altay'': Sabahattin, Zafer, Şeref, Mehmet, Alper, K.Mustafa, Kemal Kılıç, Ethem, Behiç, B.Mustafa. Subs: Can, Ramazan, Önder Ali. Coach: Bayram Dinsel. Goals: Ethem 20', Şeref 44', Behiç 53'. ''MİY'': Salih, Mustafa, Yusuf, Harun, Osman, Levent, Mücellip, Özcan, Feridun, Şilan, Kazım. Subs: Özcan, Eyüp, Kenan, Raşit. Coach: İsmet Arıkan. Yellow card: Osman 48'.<ref>"Altay - Mersin idmanyurdu: 3-0." [http://thumb.gazetearsivi.milliyet.com.tr//ML/1980/12/29/ML19801229001101305.gif Altay - Mersin idmanyurdu: 3-0]. Milliyet gazete arşivi, 29.12.1980, p. 13. Retrieved on 12.06.2010. {{tr icon}}</ref>
* 15 - 04.01.1981 - Orduspor-MİY: 1-0. Sunday. Ordu. Weather: Sunny but cold, field was muddy due to previous day's rain. Referees: Necmi Temizel, Aydın Erkal, Sadun Aksoy. '''Orduspor''': İbrahim, Uğur, Salih, Levent, B.Turgay, Üstün, Şükrü, Güven, Arif, Mahmut, Şenol. Subs: Alptekin, Sezai, Adil, Ertuğrul. Coach: Candan Dumanlı. Goal: Şenol 18'. ''MİY'': Salih, Mustafa, Yusuf, Osman, Harun, Feridun, Levent, Reşit, Mücellip, Şilan, Kazım. Subs: K.Özcan, Eyüp, Kenan, Nejat, B.Özcan. Coach: İsmet Arıkan.<ref>"Ordu-Mersin İd.Yurdu: 1-0." [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/01/05/ML19810105001101015.gif Ordu-Mersin İd.Yurdu: 1-0]. Milliyet gazete arşivi, 05.01.1981, p. 10. Retrieved on 27.10.2010. {{tr icon}}</ref>

===Second half===
* 16 - 01.02.1981 - Kocaelispor-MİY: 3-2. Sunday. Weather: heavy. İzmit. Referee: Coşkun Kutay. Referees: Coşkun Kutay, İbrahim Kalfaoğlu, Koray Kamalıoğlu. ''Kocaelispor'': Müjdat (Erhan), Zeki, Kamil, Mahir, Gürbey (Murat), Turgay, Mustafa, Baturman, Orhan, Ceyhun, Güvenç. Subs: Ahmet, Halil, Yusuf. Coach: Zeynel Soyuer. Goals: Turgay 1'(H) (25''), Güvenç 13'(H), Kamil 22'(H). ''MİY'': Salih, Mustafa, M.Ali, Sedat, Esat, Levent, Mücellip, Feridun, Metin, Vehbi, Harun. Subs: Özcan, Yusuf, Özcan, Raşit, Mehmet. Coach: İsmet Arıkan. Goals: Vehbi 18'(F), Vehbi 76'.<ref>"Kocaeli defeated Mersin İd. Yurdu by 3-2." [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/02/02/ML19810202001101113.gif Kocaeli Mersin İd. Yurdu'nu 3-2 yendi]. Milliyet gazete arşivi, 02.02.1981, p. 11. Retrieved on 02.10.2010. {{tr icon}}</ref>
* 17 - 08.02.1981 - MİY-Beşiktaş: 0-1. Sunday. Weather: First heavy then open. Mersin. Attendance: 20.000. Referres: Talat Tokat, İbrahim Karaoğlan, Turhan Özener. ''MİY'': Salih, Mustafa, Sedat, Mehmet Ali, Esat, Mücellip, Nevruz (Özcan), Feridun, K.Metin, Vehbi, Harun (Şilan). Subs: Ahmet, Yusuf, Levent. Coach: İsmet Arıkan. Yellow cards: Vehbi, Şilan, Mustafa, Mehmet Ali. ''Beşiktaş'': Rasim, Süleyman, Ulvi, Mehmet Ekşi, Samet, Rıza, Serdar, Akif, Necdet, Özer, Şaban. Subs: Mustafa, Ünal, Kenan, Fikret, Kemal. Coach: Dorde Miliç. Goal: Özer 23'.<ref>"Özer makes Beşiktaş happy in Mersin too." [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/02/09/ML19810209001101206.gif Beşiktaş'ın Mersin'de yüzünü gene Özer güldürdü]. Milliyet gazete arşivi, 09.02.1981, p. 12. Retrieved on 02.10.2010. {{tr icon}}</ref> After the match Mehmet Ali knocked Serdar.
* 18 - 15.02.1981 - Trabzonspor-MİY: 3-0. Sunday. Weather: 18°C open sunny. Trabzon. Attendance: c. 15.000. Referees: Ünal Şahin, Cemal Keçeci, Hasan Karaca. ''Trabzonspor'': Şenol, Turgay, Necati, Hüsnü, Ahmet, Arif (Mustafa), Güngör, Cemil, Sinan, Tuncay, İskender. Subs: Ali, K. Şenol. Manager: Özkan Sümer. Goals: Sinan 58', 76', 81'. ''MİY'': Salih, Mustafa, Osman (Sedat), Yusuf, Eyüp, Levent, Ferdiun, Nevruz, Metin, Vehbi, Mücellip. Subs: Ahmet, Esat, Şilan, Harun. Manager: İsmet Arıkan.<ref>"Trabzonspor broke Mersin İd. Yurdu away: 3-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/02/16/ML19810216001101202.gif Trabzonspor Mersin İd. Yurdu'nu farklı yendi: 3-0]. Milliyet gazete arşivi, 16.02.1981, p. 12. Retrieved on 28.10.2010. {{tr icon}}</ref>
* 19 - 22.02.1981 - MİY-Altay: 2-0. Sunday, 14:00. Weather: 20°C open sunny. Mersin. Referees: Yusuf Namoğlu, Sedat Kant, Özcan Dal. ''MİY'': Ahmet, Mustafa, Sedat, İsmail, Esat (Eyüp), Nevruz, Metin, Levent, Feridun, Vehbi, Mücellip. Subs: Salih, Yusuf, Mehmet, Özcan. Coach: İsmet Arıkan. Goals: Sedat 5', Nevruz 75'. ''Altay'': Sait, Sabahattin, Zafer, Şerafettin, Bilal, Alper, Kemal, B.Mustafa, Ümit, Ethem, Mustafa. Subs: Can, Ramazan, Önder, Ali, Behiç. Coach: Rıza Şenol.<ref>"Mersin İd. Yurdu - Altay: 2-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/02/23/ML19810223001101124.gif Mersin İd. Yurdu - Altay: 2-0]. Milliyet gazete arşivi, 23.02.1981, p. 11. Retrieved on 28.10.2010. {{tr icon}}</ref>
* 20 - 01.03.1981 - Zonguldakspor-MİY: 2-0. Sunday. Weather: 2°C sleety. Zonguldak. Attendance: Low. Referees: Erkan Göksel, Metin Tuğcu, Zeki İnan. ''Zonguldakspor'': Birol, Hüseyin, Tuğrul, Turgut, Muammer, Ersoy, Hamdi, Savaş, Hamit, Ayhan, Kemal. Subs: Rasim, Fuat, Yaşar, Nurettin, Ercan. Coach: Candan Tarhan. Goals: Ayhan 20', Kemal 60'. ''MİY'': Salih, Yusuf, İsmail, Esat, Sedat, Nevruz, Mehmet, Harun, Mücellip, Vehbi, Metin. Subs: Ahmet, Mustafa, Eyüp, Özcan. Coach: İsmet Arıkan.<ref>"Zonguldakspor did not sweat against Mersin İd. Yurdu: 2-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/03/02/ML19810302001101124.gif Mersin İd. Yurdu karşısında zorlanmadı: 2-0]. Milliyet gazete arşivi, 02.03.1981, p. 11. Retrieved on 28.10.2010. {{tr icon}}</ref>
* 21 - 08.03.1981 - MİY-Orduspor: 1-0. Sunday, 14:30. Weather: 22°C, open sunny. Mersin. Referees: Cumhur Demir, Kemal Ceylan, Sezai Temel. ''MİY'': Salih, Yusuf, Sedat, İsmail, Esat, Nevruz, Harun, Özcan, Mücellip, Vehbi, Metin (Şiran). Subs: Özcan, Eyüp, Kenan, Raşit. Coach: İsmet Arıkan. ''Ordu'': Alptekin, B.Turgay, Levent, K.Turgay, Salih, Seçkin, Zafer, Şükrü (Sezai), Şenol, Mahmut, Güven. Subs: İbrahim, Uğur, Selahattin. Coach: Candan Dumanlı.<ref>"Mersin İd. Yurdu left Orduspor pointless: 1-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/03/09/ML19810309001101011.gif Mersin İd. Yurdu, Orduspor'u puansız bıraktı]. Milliyet gazete arşivi, 09.03.1981, p. 10. Retrieved on 08.12.2010. {{tr icon}}</ref>
* 22 - 14.03.1981 - Galatasaray-MİY: 0-0. Saturday, 15:00. Weather: 5°C, heavy, rainy. İnönü Stadium, İstanbul. Attendance: 14.788. Referees: İhsan Türe, Erdal Balkanlı, Hasan Zerek. ''Galatasaray'': Haydar, Fettah, Ali Çoban, Fatih, Erdoğan, Cüneyt, Mustafa (B.Metin 57'), Orhan, Öner (Reşit 45'), Müfit, Bülent. Subs: Eser, Turgay, Mehmet. Coach: Brian Birch. ''MİY'': Salih, Yusuf, İsmail, Sedat, Esat, Özcan, Nevruz, Levent, Mücellip, Vehbi, Metin (Mehmet 55'). Subs: Ahmet, Eyüp, Harun, Raşit. Coach: İsmet Arıkan. Yellow cards: Esat 61', Mehmet 88'.<ref>"G.saray stambled by Mersin İd. Yurdu: 0-0." [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/03/15/ML19810315001101402.gif G.saray, Mersin İd. Yurdu'na takıldı: 0-0]. Milliyet gazete arşivi, 15.03.1981, pp. 13, 14. Retrieved on 04.09.2010. {{tr icon}}</ref>
* 23 - 29.03.1981 - MİY-Adana Demirspor: 1-0. Sunday, 14:30. Weather: 24°C sunny. Mersin. Referees: Ekrem Yenci, Onur Songur, Hasan Ceylan. ''MİY'': Salih, Yusuf, Sedat, İsmail, Esat, Nevruz, Özcan, Levent, Mücellip, Vehbi, Şilan (Harun). Subs: Ahmet, Mustafa, Raşit, Metin. Coach: İsmet Arıkan. Goal: Vehbi 4'. Yellow card: Özcan (first half). ''Adana Demirspor'': Hasan, Hüseyin, Mehmet, K.Hasan, K.Orhan, K.İbrahim, B.Orhan, Savaş, Eren, Rasin, Müjdat. Subs: İzzet, İbrahim, Nevzat, Bilbay, Adnan. Coach: Coşkun Özarı.<ref>"Mersin İd. Yurdu defeated Adana D.Spor: 1-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/03/30/ML19810330001101204.gif Mersin İd. Yurdu, Adana D.Spor'u yendi: 1-0]. Milliyet gazete arşivi, 30.03.1981, p. 12. Retrieved on 27.10.2010. {{tr icon}}</ref>
* 24 - 05.04.1981 - Gaziantepspor-MİY: 1-0. Sunday. Weather 2°C sunny. Gaziantep. Attendance: c. 10.000. Referees: Yılmaz Dinçel, Necdet Akkurt, Hakan Tatar. ''Gaziantepspor'': Yaşar, Ünsal, Fatih, Tuğrul, Ali, Doğan, Sami, Hüseyin, Reşit, Ahmet, Erdal, Murat. Subs: Cemal, Nurettin, Uğur, Müjdat, Hakan. Coach: Gürcan Berk. Goal: Erdal 11'. ''MİY'': Salih, Mustafa, Sedat, Yusuf, Esat, Levent, Mehmet Ali, Nevruz, Mücellip, Vehbi, Özcan. Bench: Ahmet, Tahir, Kenan Faruk, Raşit. Coach: İsmet Arıkan. Yellow card: Levent.<ref>"Gaziantep, Mersin İd. Yurdu'nu 1-0 mağlup etti". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/04/06/ML19810406001101013.gif Gaziantep beats Mersin İd. Yurdu by 1-0]. Milliyet gazete arşivi, 06.04.1981, p. 10. Retrieved on 12.06.2010. {{tr icon}}</ref>
* 25 - 19.04.1981 - MİY-Rizespor: 2-1. Sunday. Mersin. Referees: Erkan Göksel, Coşkun Uygun, Cengiz Demirpençe. ''MİY'': Salih, Mustafa, Sedat, Tahir, Esat, Nevruz, M.Ali, Levent, Metin, Vehbi, Şiran. Subs: Ahmet, Yusuf, Eyüp, Raşit, Harun. Coach: İsmet Arıkan. Goals: Tahir 40', Harun 68'. ''Rize'': Bahattin, Kasım, Yaşar, Kahraman, Muharrem, Müfit, Sinan, Arif, B.Osman, K.Osman, Zafer. Subs: K.Sinan, Hüseyin, Erol, Reşat. Coach: Halil Güngördü. Goal: Sinan 58'.<ref>"Mersin İd. Yurdu beat Rizspor 2-1". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/04/20/ML19810420001101310.gif Mersin İd. Yurdu, Rizespor'u 2-1 yendi]. Milliyet gazete arşivi, 20.04.1981, p. 13. Retrieved on 08.12.2010. {{tr icon}}</ref>
* 26 - 26.04.1981 - Fenerbahçe-MİY: 1-1. Sunday, 16:00. Weather: 21°C open. İnönü Stadium, İstanbul. Attendance: 16.570. Referees: Coşkun Kutay, Bedri Dölkeleş, Turan Özener. ''Fenerbahçe'': Adem, Onur, Erol, Alpaslan, Cem, Mehmet (İsa), Müjdat, Raşit, Sedat (Raşit), Mustafa, Suat, Selçuk. Subs: Fikret, Yaşar, Sertaç. Coach: Friedel Rausch. Goal: Alpasalan 55'(P). ''MİY'': Salih, Mustafa, Sedat, Tahir, Esat, Levent, Metin, Nevruz, Mehmet Ali (Metin), Özcan, Vehbi, Mücellip (Harun). Subs: Atıf, Nasır, Eyüp. Coach: İsmet Arıkan. Goal: Metin 7'(H). Yellow cards: Sedat, Vehbi.<ref>"Fenerbahçe could only save a draw from relegation candidate Mersin: 1-1". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/04/27/ML19810427001101402.gif Fenerbahçe düşme hattındaki Mersin'den beraberliği güç kurtardı: 1-1]. Milliyet gazete arşivi, 27.04.1981, pp. 13, 14. Retrieved on 08.12.2010. {{tr icon}}</ref>
* 27 - 03.05.1981 - Boluspor-MİY: 1-1. Sunday. Weather: Partly cloudy. Bolu. Referees: Necmi Temizel, Sezen Duygulu, Fazıl Aksoy. ''Boluspor'': İlker, B.İbrahim, Nuri, Alaattin, Erdem, K.İbrahim, Salahattin, Çetin, Halil İbrahim, Minas. Subs: Çetin, Şahap, Şenol, K.Mehmet, B.Mehmet. Coach: Cahit Sinan. Goal: K.Mehmet 78'. Yellow card: Alaattin 26'. ''MİY'': Salih, Mustafa, Sedat, Tahir, Esat, Levent, Nevruz, Mehmet Ali, Metin, Vehbi, Mücellip. Subs: Atıf, Eyüp, Harun, Özcan, Nazım. Coach: İsmet Arıkan. Goal: Nevruz 67'. Yellow card: Mehmet Ali 26'.<ref>"Mersin İd. Yurdu got one point from Boluspor: 1-1." [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/05/04/ML19810504001101503.gif Mersin İd. Yurdu Boluspor'dan bir puan aldı: 1-1]. Milliyet gazete arşivi, 04.05.1981, p. 15. Retrieved on 27.10.2010. {{tr icon}}</ref>
* 28 - 10.05.1981 - MİY-Adanaspor: 2-2. Sunday. Mersin. Weather: 18°C, partly cloudy. Referees: Ekrem Yenci, Turgut Sözener, Onursal Uras. ''MİY'': Salih, Mustafa, Sedat, Tahir, Esat, Nevruz, M.Ali, Levent, Metin, Vehbi, Özcan. Subs: Atıf, Eyüp, Yusuf, Nasır. Coach: İsmet Arıkan. Goals: Tahir 19', Vehbi 57'. ''Adanaspor'': Malik, Şevket, K.Mustafa, B.Mustafa, Timuçin, Nejat, Ahmet, Selahattin, Kamil, Bora, Ercan. Subs: B.Ahmet, Varol, Suat, Nihat, Gani. Coach: Gündüz Tekin Onay. Goals: Ercan 18', Ahmet 79'.<ref>"Mersin İd. Yurdu - Adanaspor couldn't beat each other: 2-2." [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/05/11/ML19810511001101208.gif Mersin İd. Yurdu - Adanaspor yenişemedi: 2-2]. Milliyet gazete arşivi, 11.05.1981, p. 12. Retrieved on 27.10.2010. {{tr icon}}</ref>
* 29 - 17.05.1981 - MİY-Eskişehirspor: 0-2. Sunday. Weather: 18°C open sunny. Mersin. Referees: Yusuf Namoğlu, Kemal, Bayram, Sedat Kant. ''MİY'': Salih, Mustafa, Sedat, Tahir, Esat (Eyüp), Nevruz, Mehmet Ali, Levent, Metin, Vehbi, Özcan. Subs: Atıf, Yusuf, Mücellip, Harun. Coach: İsmet Arıkan. Yellow card: Sedat. ''Eskişehirspor'': Sinan, Ender, Bilal, İsmail, Tayfun, Serdar, Zafer, Hüdai, Aykut, Ali İhsan, İhsan. Subs: Selahattin, Gani, Burhan, Coşkun. Coach: Nihat Atacan. Goals: Aykut 47', Ali İhsan 84'. Yellow card: İhsan.<ref>"Eskişehirspor beat Mersin İd. Yurdu in Mersin by 1-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/05/18/ML19810518001101516.gif Eskişehirspor, Mersin'de Mersin İd. Yurdu'nu 2-0 yendi]. Milliyet gazete arşivi, 18.05.1981, p. 15. Retrieved on 12.06.2010. {{tr icon}}</ref>
* 30 - 24.05.1981 - Bursaspor-MİY: 1-0. Sunday. Weather: open. Bursa. Referees: Özer Kızıltan, Yılmaz Sarıoğlu, Ergüder Yılmaz. ''Bursaspor'': Alptuğ, Sedat II, Erdinç, Ahmet, Sinan, Muzaffer, Recai, Sedat III, Cengiz, B.Ahmet, Mustafa. Subs: Aslan, İsmail, Beyhan, Turgay, Nihat. Coach: Fethi Demircan. Goal: Sedat III 11'. ''MİY'': Salih, Mustafa, Sedat, Tahir, Eyüp, Levent, Harun, Nasır, Metin, Mücellip, Özcan. Subs: Atıf, Raşit, Haluk, Hüseyin. Coach: İsmet Arıkan. Yellow card: Özcan.<ref>"Bursaspor defeated Mersin İd. Yurdu by Sedat III's goal." [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/05/25/ML19810525001101311.gif Bursaspor Mersin İd. Yurdunu Sedat III'ün golüyle yendi]. Milliyet gazete arşivi, 25.05.1981 Retrieved on 12.06.2010. {{tr icon}}</ref>

==1980–81 Turkish Cup participation==
[[Mersin İdmanyurdu]] participated in [[Turkish Cup|Türkiye Kupası]] in [[1980–81 Turkish Cup|1980–81]] and eliminated at quarter finals. [[Ankaragücü|MKE Ankaragücü]], a second division team, won the cup that year and was promoted to [[Turkish First Football League|First League]] [[Turkish First Football League 1981-82|1981-82]] by means of a special decision which was applied only for them.<ref>See some details on cup matches at [http://www.angelfire.com/nj/sivritepe/8081/CPTK.html Cepm Pekin Archives] - Retrieved on 23.07.2010.</ref>

{| class="wikitable" style="text-align: left;"
!round
!own league
!opponent's league
!opponent
!away
!home
!result
|-
|Round 5||First League||Second League Group B||{{legend3|#008000}}{{legend3|#FFFFFF}} '''[[Etimesgut Şekerspor|Şekerspor]]'''||align="center"|'''1-1'''||align="center"|'''1-0'''||promoted to R6
|-
|Round 6||First League||Second League Group B||{{legend3|#FF0000}}{{legend3|#FFFFFF}} '''[[Samsunspor]]'''||align="center"|'''0-1'''||align="center"|'''2-0'''||promoted to QF
|-
|QF||First League||Second League Group C||{{legend3|#FFFF00}}{{legend3|#000080}} '''[[Fenerbahçe S.K.|Fenerbahçe]]'''||align="center"|'''0-2'''||align="center"|'''0-2'''||eliminated
|}

* R5/L1 - 12.11.1980 - Şekerspor-MİY: 1-1. Wednesday, 14:30. 19 Mayıs Stadium, Ankara.
* R5/L2 - 17.12.1980 - MİY-Şekerspor: 1-0. Wednesday, 13:30. Tevfik Sırrı Gür Stadium, Mersin.
* R6/L1 - 25.02.1981 - Samsunspor-MİY: 1-0. Wednesday. 19 Mayıs Stadium, Samsun. Referees: Erol Polat, Turhan Şahin, Cahit Türüp. ''Samsunspor'': Adnan, Hamdi, Eyüp, Cazip, Adem, Hakkı, Metin, Kenan, Ahmet, Hasan, Murat. ''MİY'': Ahmet, Mustafa, Esat, İsmail, Sedat, Özcan, Nevruz, Metin, Harun, Mücellip, Mehmet.<ref>"Samsun - M. İ. Yurdu: 1-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/02/26/ML19810226001101118.gif Samsun - M. İ. Yurdu: 1-0]. Milliyet gazete arşivi, 26.02.1981, p. 11. Retrieved on 12.06.2010. {{tr icon}}</ref>
* R6/L2 - 11.03.1981 - MİY-Samsunspor: 2-0 (aet). Wednesday. Tevfik Sırrı Gür Stadium. ''MİY'': Goals: Mücellip Pehlivan, Özcan Kızıltan (ET).
* QF/L1 - 01.04.1981 - Fenerbahçe-MİY: 2-0. Wednesday, 15:00. Weather: 7°C, sometimes heavy sometimes sunny. İnönü Stadium, İstanbul. Attendance: 15.465. Referees: İbrahim Acar, Fikri Kuştemir, İbrahim Karaoğlan. ''Fenerbahçe'': Adem, Müjdat (Hasan 80'), Alpaslan, Erol, Cem (B.Mehmet 69'), Onur, İsa, Sedat, Ali Kemal, Raşit, Selçuk. Subs: Fikret, Yaşar, Mustafa. Goals: Selçuk 29', Raşit 88'. Red card: Sedat 87'. Coach: Friedl Rausch. ''MİY'': Salih, Yusuf, İsmail, Sedat, Esat, Levent, Nevruz (Raşit 57'), Harun, Mücellip, Vehbi, Özcan. Subs: Ahmet, Mustafa, Kenan, Metin. Coach: İsmet Arıkan. Yellow cards: Vehbi 30', Özcan 30'.<ref>"Bad football, good result for Fenerbahçe: 1-0". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/04/02/ML19810402001101604.gif Fenerbahçe'de kötü futbol, iyi sonuç: 1-0]. Milliyet gazete arşivi, 02.04.1981, p. 16. Retrieved on 08.12.2010. {{tr icon}}</ref>
* QF/L2 - 08.04.1981 - MİY-Fenerbahçe: 0-2. Wednesday, 15:00. Tevfik Sırrı Gür Stadium, Mersin. Weather: 20°C partly cloudy. Attendance: 2.989. Referees: Yavuz Tunç, Muhsin Karabağ, Zeki Gündem. ''MİY'': Salih, Mustafa, Sedat, Tahir Esat (Eyüp), Levent, Nevruz, Raşit, M.Ali, Mücellip, Harun. Subs: Ahmet, Yusuf, Kenan, Reşit. Coach: İsmet Arıkan. Yellow card: Mücellip 24'. Sent offf: Mücellip 44'. ''Fenerbahçe'': Adem, Müjdat, Erol, Alpaslan, Cem, Onur, İsa (Suat), Yaşar (Mustafa), Ali Kemal, Raşit, Selçuk. Subs: Fikret, Mehmet, Hasan. Coach: Rausch. Yellow card: İsa 44', Müjdat, Raşit. Goals: İsa 33(F), Mustafa 77'(F).<ref>"F.bahçe promoted to semi-finals by beating Mersin İdmanyurdu". [http://thumb.gazetearsivi.milliyet.com.tr//ML/1981/04/09/ML19810409001101116.gif M. İd. yurdu'nu 2-0 yenen F.bahçe yarıfinale yükseldi]. Milliyet gazete arşivi, 09.04.1981, p. 11. Retrieved on 06.09.2010. {{tr icon}}</ref>

==1980–81 squad==
Some of the players of Mersin İdmanyurdu include following.<ref>[http://www.macanilari.com/14.Aralik.1980_1980-1981.Sezonu.1.Lig.12.Hafta.Maci.Eskisehirspor.2-0.Mersin.Idman.Yurdu-198019811205--.html maç anıları]</ref>
Transfers in (Summer): İsmail (Trabzonspor); Right-back Mustafa Çimen (Beşiktaş); Harun, Levent (Gençlerbirliği); Yusuf (Sebat Gençlik), Eyüp (Adanaspor); Raşit (Tarsus İdmanyurdu).

In the mid-season K.Metin was loaned from Galatasaray; and Vehbi was loaned from Diyarbakırspor. Nevruz loaned from Altay (21.12.1980).

{{fs start}}
{{fs player|no= |pos=GK|nat=Turkey|name=[[Salih Sayar]]}}
{{fs player|no= |pos=GK|nat=Turkey|name=K. Ahmet}}
{{fs player|no= |pos=DF|nat=Turkey|name=[[Mustafa Çimen]]}}
{{fs player|no= |pos=DF|nat=Turkey|name=Yusuf}}
{{fs player|no= |pos=DF|nat=Turkey|name=Sedat}}
{{fs player|no= |pos=DF|nat=Turkey|name=İsmail}}
{{fs player|no= |pos=DF|nat=Turkey|name=[[Tahir Temur]]}}
{{fs player|no= |pos=DF|nat=Turkey|name=[[Osman Öngen]]}}
{{fs player|no= |pos=DF|nat=Turkey|name=Esat}}
{{fs player|no= |pos=DF|nat=Turkey|name=Eyüp}}
{{fs player|no= |pos=DF|nat=Turkey|name=Kasım}}
{{fs player|no= |pos=DF|nat=Turkey|name=B. Ahmet}}
{{fs player|no= |pos=MF|nat=Turkey|name=Harun}}
{{fs player|no= |pos=MF|nat=Turkey|name=Nejat}}
{{fs player|no= |pos=MF|nat=Turkey|name=Kenan}}
{{Football squad mid}}
{{fs player|no= |pos=MF|nat=Turkey|name=[[Özcan Kızıltan]]}} B. Özcan
{{fs player|no= |pos=MF|nat=Turkey|name=[[Levent Arıkdoğan]]}}
{{fs player|no= |pos=MF|nat=Turkey|name=Feridun}}
{{fs player|no= |pos=MF|nat=Turkey|name=Nasır}}
{{fs player|no= |pos=MF|nat=Turkey|name=Nevruz}}
{{fs player|no= |pos=MF|nat=Turkey|name=Vehbi}}
{{fs player|no= |pos=MF|nat=Turkey|name=K. Özcan}}
{{fs player|no= |pos=MF|nat=Turkey|name=Kazım}}
{{fs player|no= |pos=DF|nat=Turkey|name=Övünç}}
{{fs player|no= |pos=MF|nat=Turkey|name=[[Metin Koyuncuoğlu]]}}
{{fs player|no= |pos=MF|nat=Turkey|name=[[Mehmet Ali Karakuş]]}}
{{fs player|no= |pos=FW|nat=Turkey|name=[[Mücellip Pehlivan]]}}
{{fs player|no= |pos=FW|nat=Turkey|name=[[Raşit Karasu]]}}
{{fs player|no= |pos=FW|nat=Turkey|name=Şilan}}
{{fs player|no= |pos=FW|nat=Turkey|name=Reşit}}
{{fs end}}

Özcan went to Fenerbahçe after the season (30.04.1981). In exchange Esat and İsmail came to MİY from Fenerbahçe.

==See also==
* [[Football in Turkey]]
* [[Turkish First Football League]]

==References==
{{reflist|2}}

{{Mersin İdmanyurdu Seasons}}

{{DEFAULTSORT:1980-81 Mersin Idmanyurdu Season}}
[[Category:Mersin İdmanyurdu seasons]]

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