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.

Sources

• John J. O'Connor and Edmund F. Robertson: "Johann Heinrich Rahn": MacTutor History of Mathematics archive