Johann Rahn

Johann Rahn
Johann Rahn

Johann Rahn was a Swiss mathematician who is credited with the first use of the division sign, ÷ and the therefore sign, ∴. The symbols were used in Teutsche Algebra, published in 1659. John Pell collaborated with Rahn in this book, which contains an example of the Pell equation. It is uncertain whether Rahn or Pell was responsible for introducing the symbols.

From *.wikipedia.org,
General Info
.
Male
Date of Birth
March 10th, 1622
Age
404
Birth Place
Switzerland, Canton of Zürich, Winterthur
Date of Death
May 27th, 1676
Died Aged
54
Star Sign
Pisces
Social Networks , Links
Interest
Loading Chart...
Lists
    index: 1x 0.026754856109619s
fmsppl-page-output: 1x 0.023239135742188s
t_/pages/fms-person-json: 1x 0.023213863372803s
t_/blocks/person-card-json: 1x 0.016571044921875s
headline: 8x 0.010818004608154s
t_/common/header: 1x 0.0061428546905518s
router_page: 1x 0.0027060508728027s
t_/common/head: 1x 0.00053000450134277s
head-facts: 1x 0.00050711631774902s
t_/common/footer: 1x 0.00030422210693359s
t_/common/searcher-result: 1x 1.3828277587891E-5s
----- END OF DUMP (2026-08-31 11:43:08)  -----