Mathematician:Diophantus of Alexandria

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Mathematician living in Alexandria, Egypt, about whom very little is known.

Author of a series of books called Arithmetica, some of which are now lost, concerning the solution of algebraic equations.

Sometimes referred to as "the father of algebra", but some claim the title should belong to Al-Khwarizmi.


Egyptian, probably a Hellenized Babylonian


  • Born: between 200 and 214 CE (location unknown)
  • Died: between 284 and 298 CE

Theorems and Definitions

Results named for Diophantus of Alexandria can be found here.

Definitions of concepts named for Diophantus of Alexandria can be found here.


  • Arithmetica (13 books, of which 6 have survived (some say 10))
  • On Polygonal Numbers (only fragments now exist)
  • Porisms (may have originally been part of Arithmetica)

Critical View

I came to believe that in Arithmetic and Logistic, "I was Somebody". And in fact by not a few, among them some true scholars, I was adjudged an Arithmetician beyond the common order. But when I first came upon the work of Diophantos, his method and his reasoning so overwhelmed me that I scarcely knew whether to think of my former self with pity or with laughter.
-- Wilhelm Xylander
-- Introduction to his translation of the Arithmetica of Diophantus

Also known as

Some sources render his name as Diophantos.

Also see