Theaetetus, a Greek mathematician.

It doesnt have a specific title. But i feel that it covers the pythagorean proofs of Theaetetus :)

John M Rist has written:

'The aviary model in the Theaetetus' -- subject- s -: Knowledge, Theory of, Theory of Knowledge

"To become like God (homoiosis theo), so far as this is possible; and to become like God is to become righteous and holy and wise." (Plato's Theaetetus, 176b)

The first comprehensive theory of knowledge was developed by the ancient Greek philosopher Plato. In his dialogue "Theaetetus," Plato explores the nature of knowledge as justified true belief.