# Mathematician:Hypsicles of Alexandria

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## Mathematician

Alexandrian mathematician and astronomer best known for having Book $\text{XIV}$ of Euclid's *The Elements* attributed to him.

Whether or not he was also responsible for Book $\text{XV}$ of *The Elements* is still up for debate.

Also appears to have written a (now lost) work on polygonal numbers.

## Nationality

Alexandrian

## History

- Born: c. 190 BCE, Alexandria, Egypt
- Died: c. 120 BCE

## Publications

- Book $\text{XIV}$ of Euclid's
*The Elements* *On the Ascension of Stars*