Weierstrass Definition

Karl Theodor Wilhelm Weierstrass was a German mathematician who is often cited as the father of modern analysis and made significant contributions to mathematical analysis during the 19th century. His work laid the foundation for calculus and analysis, including the rigorous establishment of the Weierstrass functions which are continuous everywhere but differentiable nowhere, and the Weierstrass’ theorem which provides a sufficient condition for a function to be uniformly continuous.