Maurice Fréchet was a French mathematician. He made major contributions to the topology of point sets and introduced the entire
concept of metric spaces. He also made several important contributions to the field of statistics and probability, as well
as calculus. His dissertation opened the entire field of functionals on metric spaces and introduced the notion of compactness.
Independently of Riesz, he discovered the representation theorem in the space of Lebesgue square integrable functions.