Jean-Robert Argand

Jean-Robert Argand
BornJuly 18, 1768
Geneva, Republic of Geneva
DiedAugust 13, 1822 (1822-08-14) (aged 54)
Paris
NationalityRepublic of Geneva, and then Switzerland (since 1815)
Known forArgand diagram and Proof of Fundamental Theorem of Algebra
Scientific career
FieldsMathematics

Jean-Robert Argand (UK: /ˈɑːrɡænd/, US: /ˌɑːrˈɡɑːn(d)/,[1][2] French: [ʒɑ̃ ʁɔbɛʁ aʁɡɑ̃]; July 18, 1768 – August 13, 1822) was a Genevan amateur mathematician. In 1806, while managing a bookstore in Paris, he published the idea of geometrical interpretation of complex numbers known as the Argand diagram and is known for the first rigorous proof of the Fundamental Theorem of Algebra.

  1. ^ Wells, John C. (2008). Longman Pronunciation Dictionary (3rd ed.). Longman. ISBN 978-1-4058-8118-0.
  2. ^ Jones, Daniel (2011). Roach, Peter; Setter, Jane; Esling, John (eds.). Cambridge English Pronouncing Dictionary (18th ed.). Cambridge University Press. ISBN 978-0-521-15255-6.