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Theon of Smyrna : ウィキペディア英語版 | Theon of Smyrna Theon of Smyrna ((ギリシア語:Θέων ὁ Σμυρναῖος); fl. 100 CE) was a Greek philosopher and mathematician, whose works were strongly influenced by the Pythagorean school of thought. His surviving ''On Mathematics Useful for the Understanding of Plato'' is an introductory survey of Greek mathematics. ==Life== Little is known about the life of Theon of Smyrna. A bust created at his death, and dedicated by his son, was discovered at Smyrna, and art historians date it to around 135 CE. Ptolemy refers several times in his ''Almagest'' to a Theon who made observations at Alexandria, but it is uncertain whether he is referring to Theon of Smyrna.〔James Evans, (1998), ''The History and Practice of Ancient Astronomy'', page 49〕 The lunar impact crater Theon Senior is named for him.
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