## Most recent change of Argand

Edit made on November 12, 2008 by DerekCouzens at 08:26:57

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WW

HEADERS_END

~~Jean Robert~~ [[[> IMG:1156_Argand-Jean-Robert.jpg ]]]

Jean-Robert Argand (1768 - 1822) was an accountant and bookkeeper in Paris who was only an amateur mathematician.

Argand is famed for his geometrical interpretation of the complex numbers where

multiplication by /i/ is interpreted as an ~~anti-clocakwise~~ anti-clockwise rotation

through 90°. The concept of the modulus of a complex number is also due to Argand but Cauchy, who used the term

later, is usually credited as the originator this ~~concept. The Argand diagram is taught to most school children ~~

who are studying mathematics and Argand's name will live on in the history of mathematics through this important

concept.

The fact that his name is associated with this geometrical interpretation of complex numbers is only as a result

of a rather strange sequence of events.

For more, read on ...

* http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Argand.html

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One of the famous people on this site