The Greek mathematician Diophantus is generally regarded as the "Father of Algebra". Diophantus first used algebraic notation and symbols around 250 AD. He wrote a treatise on algebra in his "Arithmetica", comprising 13 books. Only six of these books have survived.
A mathematician to the very end, Diophantus' age can be determined from the epitaph on his tombstone. An English paraphrase of this epitaph reads:
"Diophantus passed one-sixth of his life in childhood, one-twelfth in youth, one-seventh more as a bachelor; five years after his marriage a son was born who died four years before his father at half his father's final age."
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