Euler's work on infinitesimal calculus

Leonhard Euler was a pioneering mathematician who advanced the development of infinitesimal calculus, a branch of mathematics concerned with analyzing change and motion. He expanded the understanding of calculus by introducing new techniques for solving complex problems involving rates of change and accumulation, such as derivatives and integrals. Euler's work helped formalize the methods used to analyze dynamic systems, laying the groundwork for many modern applications in science and engineering. His contributions made calculus more accessible and powerful, shaping how mathematicians and scientists understand the behavior of functions and physical phenomena.