Édouard Goursat
was born 159 years ago
21st May 1858

Édouard Goursat is best known for his version of the Cauchy-Goursat theorem stating that the integral of a function round a simple closed contour is zero if the function is analytic inside the contour.

Find out more at:
http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Goursat.html