Cauchy, Augustin Louis, Baron (1789–1857)
Augustin Cauchy was a French mathematician who founded complex
analysis, by discovering the Cauchy-Riemann equations, and wrote
789 papers – an output surpassed only by Leonhard Euler,
Arthur Cayley, and Paul Erdös.
He coined the name for the determinant and systematized its study and gave nearly modern definitions of limit, continuity, and convergence.