Theonis Smyrnaei Philosophi Platonici: Expositio Rerum Mathematicarum Ad Legendum Platonem Utilium is a book written by Theon, a Platonist philosopher from Smyrna, in 1878. The book is an exposition of the mathematical concepts that are useful for reading and understanding Plato's works. Theon provides a detailed analysis of topics such as arithmetic, geometry, and astronomy, and how they relate to Plato's philosophy. The book is written in Greek...