# Mathematician:Johann Heinrich Rahn

## Mathematician

Swiss mathematician credited with the first use of the division symbol, $\div$, also known as the obelus, and the therefore sign, $\therefore$.

## Nationality

Swiss

## History

- Born: 10 March 1622 in Töss, Switzerland
- Died: 25 May 1676 in Zürich, Switzerland

## Publications

- 1659:
*Teutsche Algebra*(technically a collaboration with John Pell)

## Also known as

The Latinised form of his name was **Rhonius**.