French Esperantists

Théophile Cart (March 31, 1855 in Saint-Antoine-de-Breuilh - May 21, 1931 in Paris) was a French Esperantist professor and linguist.
Beginning in 1907, Cart was an editor for Lingvo Internacia.

René Maurice Fréchet (French: [ʁəne mɔʁis fʁeʃɛ, moʁ-]; 2 September 1878 – 4 June 1973) was a French mathematician. He made major contributions to general topology and was the first to define 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. He is often referred to as the founder of the theory of abstract spaces.