Bas Edixhoven
Sebastiaan Johan Edixhoven (12 March 1962 – 16 January 2022) was a Dutch mathematician who worked in arithmetic geometry. He was a professor at University of Rennes 1 and Leiden University. Education Bas Edixhoven was born on 12 March 1962 in Leiden, Netherlands. Edixhoven graduated from in Zoetermeer in 1980. He then studied at Utrecht University where he graduated with a master's degree in pure mathematics cum laude in 1985 and a PhD in mathematics in 1989, both under the direction of Frans Oort. His thesis was about modular curves. Career Edixhoven was a Morrey assistant professor at the University of California, Berkeley from 1989 to 1991, after which he returned to Utrecht University. From 1992 to 2002, he was a professor at the University of Rennes 1. He moved to Leiden University as a Professor of Geometry in 2002. In 2004, Edixhoven and Peter Stevenhagen established Leiden's participation in the Algebra, Geometry and Number Theory (ALGANT) collaborative program for master's and PhD students across French, Italian, German, Canadian, and Dutch universities. Edixhoven was a co-managing editor of Compositio Mathematica from 2003 to 2012. He was an editor for Compositio Mathematica from 2000 to 2012, for the Journal de Théorie