The Jean-Robert Argand reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Jean-Robert Argand

Jean-Robert Argand (July 18, 1768 - August 13, 1822) was a non-professional mathematician. In 1806, he, while managing a bookstore in Paris, published the idea of geometrical interpretation of complex numbers.

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