Stephen William Semmes (born 26 May 1962) is the Noah Harding Professor of Mathematics at Rice University.
[1] He is known for contributions to analysis on metric spaces, as well as harmonic analysis, complex variables, partial differential equations, and differential geometry.
at the age of 18, a Ph.D. at 21 from Washington University in St. Louis and became a full professor at Rice at 25.
Semmes was awarded a Sloan Fellowship in 1987.
[2] In 1994, he gave an invited talk at the International Congress of Mathematicians.