Mathematician:Theodosius of Bithynia
Greek astronomer and mathematician best known for writing Sphaerics, a book on spherical geometry.
According to Vitruvius, he is supposed to have invented a sundial which would work anywhere in the world.
Sometimes confused with various other writers called Theodosius. On this basis, often erroneously believed to have been born in Tripolis.
- Born: c. 160 BCE, Bithynia, Anatolia (now Turkey)
- Died: c. 100 BCE
- Sphaerics (possibly inspired or influenced by a lost work by Eudoxus of Cnidus)
- On Habitations (discussing astronomical matters from the point of view of various different latitudes)
- On Days and Nights (on the apparent motion of the Sun)
Possibly also wrote a commentary on The Method by Archimedes, but as this information comes from the same unreliable source (mentioned above) that confuses this Theodosius with others, this is uncertain.
- It is evident that Theodosius was simply a laborious compiler, and that there was practically nothing original in his work.
- -- T.L. Heath
- To which one might feel justified in replying that Heath must have believed he had found a kindred spirit.