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Johann Rahn

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Name
  
Johann Rahn

Grandparents
  
Hans Rudolf Rahn

Parents
  
Hans Heinrich Rahn

Died
  
1676, Zurich, Switzerland

Role
  
Mathematician


Johann Rahn (Latinised form Rhonius) (10 March 1622 – 25 May 1676) was a Swiss mathematician who is credited with the first use of the division symbol, ÷ (obelus) 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. Rahn was also, it seems, mayor of the city of Zurich in 1655.

Contents

Books

  • Teutsche Algebra - Johann H. Rahn

    • Literatur

  • R. Acampora Johann Heinrich Rahn und seine Teutsche Algebra, in R. Gebhardt (Herausgeber) Visier- und Rechenbücher der frühen Neuzeit, Schriften des Adam-Ries-Bundes Annaberg-Buchholz 19, 2008, S. 163–178
  • Moritz Cantor: Rahn, Johann Heinrich . In: General German Biography (ADB). Volume 27, Duncker & Humblot, Leipzig, 1888, pp. 174 f
  • Noel Malcolm, Jacqueline Stedall John Pell (1611–1685) and His Correspondence with Sir Charles Cavendish: The Mental World of an Early Modern Mathematician, Oxford University Press, Oxford, 2005
  • Christoph Scriba John Pell's English Edition of J. H. Rahn 's Teutsche Algebra, in: R. S. Cohen (Herausgeber) For Dirk Struik, Reidel: Dordrecht 1974, S. 261–274
  • Jacqueline Stedall A Discourse Concerning Algebra: English Algebra to 1685, Oxford University Press, Oxford, 2002

    • References

    Johann Rahn Wikipedia
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