Hello, I'm glad to answer your question. Augustin louis cauchy is a famous mathematician. The first mathematician who realized that the theory of infinite series is not a general generalization of polynomial theory, but should base its complete theory on limit. Achievements:/kloc-The calculus principle in the 9th century is not strict. He rejected the theory of calculus at that time and defined a series of principles of calculus. He published more than 800 papers in his life. Among them, the most famous ones are Analysis Course, Introduction to Differential Element Analysis and Application of Calculus in Geometry. In a paper of 1823, he proposed that the general equations of elastic body equilibrium and motion can be expressed by six components respectively. He and Ma Kraulin rediscovered the integral test, a method to test whether infinite series converges. The integral test can be traced back to14th century Indian mathematician Madava and Kerala School in Madava. His most important contributions in his life are mainly in calculus, complex variable functions and differential equations. Academic Value: augustin louis cauchy is a world-famous mathematician. He is the pioneer of mathematical analysis rigor, the founder of complex variable function theory and the founder of elastic theory foundation. He is a prolific mathematician next to Euler. All his works, including 789 papers, amount to 24 volumes, among which there are many groundbreaking works. It is universally acknowledged that even after nearly two centuries, Cauchy's work is still not far from the central position of modern mathematics. The method he introduced and his unparalleled creativity opened a new era of rigor in modern mathematics. Main works: augustin louis cauchy discovered and proved many differential equations all his life. The main list is as follows: Cauchy Discrimination Cauchy Integral Theorem Cauchy Integral Formula Cauchy-Schwartz Inequality Cauchy Distribution Cauchy Sequence Cauchy-Riemann Equation Cauchy Product Cauchy-Binet.Alfred Formula Cauchy-Euler Equation Cauchy Problem Cauchy Integral Test The above is my answer, I hope it will be helpful to you.