Theon of Alexandria

Greek scholar and mathematician (c. 335–405)

Theon of Alexandria (Ancient Greek: Θέων ὁ Ἀλεξανδρεύς; c. AD 335 – c. 405) was a Greek scholar and mathematician who lived in Alexandria, Egypt. He edited and arranged Euclid's Elements and wrote commentaries on works by Euclid and Ptolemy. His daughter, Hypatia, also won fame as a mathematician.

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