Weierstraß
Karl Weierstrass was a German mathematician widely regarded as the "father of modern analysis." Born in 1815, his early career was marked by teaching secondary school mathematics due to his lack of a university degree. However, his self-published work on the theory of elliptic functions gained him recognition, eventually leading to an academic position.
Weierstrass's most significant contributions lie in the rigorous formulation of calculus and mathematical analysis. He is
He also made advancements in the study of functions, including the Weierstrass M-test for uniform convergence