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Rahn biography
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Johann Heinrich Rahn

Born: 10 March 1622 in Zurich, Switzerland
 Died: 1676

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Version for printing

Johann Rahn was the first to use the symbol € for division in his algebra book published in 1659. Rahn's book was written in German. Pell helped Rahn with this book which contains an example of Pell's equation.

The book is important for the innovation in algebraic symbolism that it contains but recent work has suggested that credit for this may be due more to Pell than to Rahn.

Article by: J J O'Connor and E F Robertson

A Reference (One book/article)
Mathematicians born in the same country

Additional Material in MacTutor

  1. Pell's equation

Cross-references in MacTutor

  1. History Topics: Pell's equation
  2. Chronology: 1650 to 1675
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