Complex sentence: Pierre Humbert (13 June 1891, Paris-17 November 1953, Paris) was a French mathematician who worked on the theory of elliptic functions and introduced Humbert polynomials.
Split into simpler sentences: Pierre Humbert (13 June 1891, Paris-17 November 1953, Paris) was a French mathematician. Humbert worked on the theory of elliptic functions and introduced Humbert polynomials.