Torsion tensor: Difference between revisions

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en>Cuzkatzimhut
Undid revision 583646673 by 130.133.8.114 (talk)pls justify inclusion
en>BG19bot
m WP:CHECKWIKI error fix for #99. Broken sup tag. Do general fixes if a problem exists. -, replaced: <sup>k</sub> → <sup>k</sup> (3) using AWB (9957)
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[[Image:Epispiral.svg|thumb|226px|An epispiral with equation r(&theta;)=2sec(2&theta;)]]
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The epispiral is a [[plane curve]] with polar equation
:<math>\ r=a \sec{n\theta}</math>.
There are ''n'' sections if ''n'' is odd and 2''n'' if ''n'' is even.
 
It is the polar or circle [[inversive geometry|inversion]] of the [[rose (mathematics)|rose]] curve.
 
==See also==
*[[Logarithmic spiral]]
 
==References==
* {{cite book | author=J. Dennis Lawrence | title=A catalog of special plane curves | publisher=Dover Publications | year=1972 | isbn=0-486-60288-5 | page=192 }}
 
[[Category:Curves]]
 
{{geometry-stub}}

Revision as of 10:53, 1 March 2014

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