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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Sphaerics ： ウィキペディア英語版 Sphaerics ''Sphaerics'' () was a set of three volumes on spherical geometry written by Theodosius of Bithynia in the 2nd century BC. These proved essential in the restoration of Euclidean geometry to Western civilization, when brought back from the Islamic world during the crusades and translated back from Arabic into Latin.〔(Theodosius of Bithynia )〕 ==History== Theodosius appears to have written ''Sphaerics'' as a supplement to Euclid's ''Elements'', allowing its application in astronomy. Elements had lacked spherical geometry. Sphaerics had its own shortcomings, for example Hipparchus had already introduced trigonometry, but Theodosius makes no use of it, perhaps because he was basing it on an earlier work by Eudoxus. Theodosius' primary function in this, and other, works is to gather together existing information into one place. In the first book of Sphaerics, he carefully explains that a sphere is a shape whose surface is an equal distance, in any spot, from a central point, and then goes on to examine the geometry of spheres, extensively.〔(Theodosius, Sphaerica iii 1 trans. by Henry Mendell, Cal. State U., L.A. )〕 The work's primary importance was in the restoration of Euclidean geometry to European knowledge, as this, and much other technology and philosophy, had been lost to Christendom, but preserved in Arabic translations during the Islamic Golden Age,〔Theodosius – Sphaerica: Arabic and Medieval Latin Translations, by Paul Kunitzsch, published by Franz Steiner Verlag; Bilingual edition (April 13, 2010)〕 then brought back to Europe during the Crusades and translated back into Latin.〔(THEODOSIUS OF BITHYNIA at Encyclopedia.com )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sphaerics」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.