fourths correspond respectively with the fractions 2/1, 3/2, and 4/3. His contributions greatly contributed to the fields of music and physics (Papadopoulos, 2002). See also Theon of Alexandria Notes Bibliography Theon of Smyrna: Mathematics useful for understanding Plato; translated from the 1892 Greek/French edition of J. Dupuis by Robert and Deborah Lawlor and edited and annotated by Christos Toulis and others; with an appendix of notes by Dupuis, a copious glossary, index of works, etc. Series: Secret doctrine reference series, San Diego : Wizards Bookshelf, 1979. . 174pp. E.Hiller, Theonis Smyrnaei: expositio rerum mathematicarum ad legendum Platonem utilium, Leipzig:Teubner, 1878, repr. 1966. J. Dupuis, Exposition des connaissances mathematiques utiles pour la lecture de Platon, 1892. French translation. Lukas Richter:"Theon of Smyrna". Grove Music Online, ed. L. Macy. Accessed 29 Jun 05. (subscription access) Papadopoulos, Athanase (2002). Mathematics and music theory: From Pythagoras to Rameau. The Mathematical Intelligencer, 24(1), 65–73. doi:10.1007/bf03025314 2nd-century philosophers Ancient Greek mathematicians Ancient Greek music theorists Ancient Smyrnaeans People from İzmir Neo-Pythagoreans Ancient Roman philosophers Philosophers of ancient Ionia Pythagoreans Middle Platonists 2nd-century mathematicians