When1: 1814
When2: 1829
Who: Augustin-Louis Cauchy [Cauchy, Augustin-Louis]
What: mathematician
Where: Paris, France
works\ Lessons on Differential Calculus [1829]
Detail: He lived 1789 to 1857, used arithmetic concepts for mathematical analysis, and began complex-variable function theory [1814]. He invented Cauchy's principle, Cauchy convergence criterion, and Cauchy integral theorem. He studied method of characteristics, theory of content, and spaces. Separating first-order partial-differential-equation variables can make ordinary-differential-equation systems. First-order partial differential equation systems can describe elastic-media properties.
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Date Modified: 2022.0224