146.50.70.108: /* Forward DWT */

2013-06-14T11:25:53Z

Forward DWT

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	~~Nice~~ to ~~satisfy you~~, ~~my name~~ is ~~Figures Held though I don~~'~~t really like becoming called like~~ that. ~~Managing people~~ is his ~~occupation~~. ~~South Dakota is her birth location~~ but ~~she requirements to transfer simply because~~ of ~~her family members~~. ~~What I love doing~~ is ~~to gather badges but I've been taking on new things recently~~.<~~br><br>Also visit my blog post~~ - ~~healthy food delivery (~~[~~http~~:~~//P2p~~.~~gs/diettogoreviews74620 homepage~~])		{{Unreferenced\|date=December 2009}}
			'''Ivan Mikheevich Pervushin''' (''Иван Михеевич Первушин'') (January 21, 1827 – June 29, 1900) was a [[Russia]]n [[mathematician]] of the 2nd half of 19th century.

			Pervushin was born in the town of [[Lysva]] of the [[Perm]] [[gubernia]] to a family of a [[clergy]]man. He graduated from Kazan clerical academy in 1852. Upon graduation, Pervushin was required to become a priest; he stayed for some time in Perm, then moved to a remote village of Zamaraevo, some 150 miles from [[Ekaterinburg]], where he lived for 25 years.

			The Priest's job provided for Pervushin's life and left him plenty of free time to spend on [[mathematics]]. Pervushin was particularly interested in [[number theory]]. In 1877 and in the beginning of 1878 he presented two papers to the [[Russian Academy of Sciences]]. In these papers, he proved that the 12th and 23rd [[Fermat number]]s are composite:

			<math>2^{2^{12}} + 1</math> is divisible by <math>7*2^{14}+1=114689 </math>

			and

			<math>2^{2^{23}} + 1</math> is divisible by <math>5*2^{25}+1=167772161</math>

			In 1883 Pervushin demonstrated that the number:

			<math>2^{61}-1</math> = 2305843009213693951

			is a [[Mersenne prime]]. This number became known as "Pervushin's number", and remained the second largest known prime (after <math>2^{127}-1</math>, proved prime by [[Édouard Lucas\|Lucas]] 7 years earlier) until 1911, when [[R. E. Powers\|Powers]] proved that <math>2^{89}-1</math> is prime.

			From Zamaraevo, Pervushin moved to the nearby town of [[Shadrinsk]] in 1883. Here Pervushin published an article that ridiculed the local government. As a punishment, he was exiled to the village of [[Mehonskoe]] in 1887.

			A contemporary of Pervushin's, writer A.D.Nosilov, who frequently visited Pervushin in Mehonskoe, wrote a paper "Priest-mathematician", which was published in the "New time" magazine on July 6, 1896.

			He wrote: "... this is the modest unknown worker of science ... All of his spacious study is filled up with the different mathematical books, ... here are the books of famous mathematicians: [[Chebyshev]], [[Adrien-Marie Legendre\|Legendre]], [[Riemann]]; not including all modern mathematical publications, which were sent to him by Russian and foreign scientific and mathematical societies. It seemed I was not in a study of the village priest, but in a study of an old mathematics professor ... Besides being a mathematician, he is also a statistician, a meteorologist, and a correspondent".

			Pervushin died in Mehonskoe at the age of 73.

			{{Authority control\|VIAF=171816442}}

			{{Persondata <!-- Metadata: see [[Wikipedia:Persondata]]. -->
			\| NAME = Pervushin, Ivan Mikheevich
			\| ALTERNATIVE NAMES =
			\| SHORT DESCRIPTION = Russian mathematician
			\| DATE OF BIRTH = January 21, 1827
			\| PLACE OF BIRTH =
			\| DATE OF DEATH = June 29, 1900
			\| PLACE OF DEATH =
			}}
			{{DEFAULTSORT:Pervushin, Ivan Mikheevich}}
			[[Category:Russian mathematicians]]
			[[Category:1827 births]]
			[[Category:1900 deaths]]
			[[Category:Russian Christians]]

en>Glenn: +link

2012-08-31T17:23:52Z

+link

New page

Nice to satisfy you, my name is Figures Held though I don't really like becoming called like that. Managing people is his occupation. South Dakota is her birth location but she requirements to transfer simply because of her family members. What I love doing is to gather badges but I've been taking on new things recently.<br><br>Also visit my blog post - healthy food delivery ([http://P2p.gs/diettogoreviews74620 homepage])

Fast wavelet transform - Revision history

146.50.70.108: /* Forward DWT */

en>Glenn: +link