Lagrange’s Four-Square Theorem

Pole DC	Wartość	Język
dc.contributor.author	Watase, Yasushige	-
dc.date.accessioned	2015-12-09T20:40:50Z	-
dc.date.available	2015-12-09T20:40:50Z	-
dc.date.issued	2014	-
dc.identifier.citation	Formalized Mathematics, Volume 22, Issue 2, 2014, Pages 105-110	-
dc.identifier.issn	1426-2630	-
dc.identifier.issn	1898-9934	-
dc.identifier.uri	http://hdl.handle.net/11320/3708	-
dc.description.abstract	This article provides a formalized proof of the so-called “the four-square theorem”, namely any natural number can be expressed by a sum of four squares, which was proved by Lagrange in 1770. An informal proof of the theorem can be found in the number theory literature, e.g. in [14], [1] or [23]. This theorem is item #19 from the “Formalizing 100 Theorems” list maintained by Freek Wiedijk at http://www.cs.ru.nl/F.Wiedijk/100/.	-
dc.language.iso	en	-
dc.publisher	De Gruyter Open	-
dc.subject	Lagrange’s four-square theorem	-
dc.title	Lagrange’s Four-Square Theorem	-
dc.type	Article	-
dc.identifier.doi	10.2478/forma-2014-0012	-
dc.description.Affiliation	Suginami-ku Matsunoki 6, 3-21 Tokyo, Japan	-
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