Augustin-Louis Cauchy, French Mathematician
Cauchy around 1840. Augustin-Louis Cauchy (August 21, 1789 - May 23, 1857) was a French mathematician and early pioneer of analysis. He started the project of formulating and proving the theorems of infinitesimal calculus, rejecting the heuristic principle of the generality of algebra exploited by earlier authors. He defined continuity in terms of infinitesimals and gave several important theorems in complex analysis and initiated the study of permutation groups in abstract algebra. He was a prolific writer who wrote over eight hundred research articles and five complete textbooks. He was a devout Roman Catholic, strict Bourbon royalist, and a close associate of the Jesuit order. He died in 1857 at the age of 67. His name is one of the 72 names inscribed on the Eiffel Tower. This image has been colorized
