Eudoxus of Cnidus
Although he was not a creative mathematician, Plato (427–347 BC) included the "quadrivium" as the basis for philosophical education in the "Republic". He encouraged a younger mathematician, Eudoxus of Cnidus (c. 410 BC–c. 347 BC), to develop a system of Greek astronomy. According to a modern historian of science, David Lindberg: