From Wikipedia, the free encyclopedia
Johann Rahn (Latinised form Rhonius) (1622–1676) was a Swiss mathematician who is credited with the first use of the division symbol, ÷ (obelus) and the therefore sign, ∴. The symbol is used in Teutsche Algebra, published in 1659.
- Cajori, Florian. A History of Mathematical Notations. 2 volumes. Lasalle, Illinois: The Open Court Publishing Co., 1928–1929 vol. 2, page 211.
|This article about a Swiss scientist is a stub. You can help Wikipedia by expanding it.|
|This article about a European mathematician is a stub. You can help Wikipedia by expanding it.|