Entry Version:

This is the English version of this article translated by Patrick Hogan. The original Italian version was written by Eleonora Rocconi and first published on 14/11/2007.

Here is the Italian version of this entry.

Grammarian:

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Biography:

Theon was a philosopher and mathematician of Platonic¹-Pythagorean² orientation, but we have only a few scraps of biographical information about him. From Claudius Ptolemaeus’³ astronomical treatise known as the Almagest⁴ (where T…