Mathematician:Eratosthenes of Cyrene

Mathematician
Ancient Greek: Ἐρατοσθένης.

Greek geometer and astronomer best known for his estimate of the size of the Earth.

Also famous for his Sieve of Eratosthenes. Famously a correspondent with, who addressed the preamble of his to him.

Custodian of the Library of Alexandria.

Went blind in his old age, and it is said that he committed suicide by starving himself to death.

Nationality
Greek

History

 * Born: c. 276 BCE, Cyrene, North Africa (now Shahhat, Libya)
 * Died: c. 194 BCE, Alexandria, Egypt

Theorems and Topics

 * Sieve of Eratosthenes
 * Eratosthenes' Measurement of Earth

Books and Papers

 * Platonicus (on the philosophy of )
 * Hermes

Other works
These works are referred to by other ancient writers, but are now believed lost:
 * On the measurement of the Earth
 * On means (now lost: recognised by as one of the great works of geometry)