Aise Johan de Jong

Aise Johan de Jong (born 30 January 1966) is a Dutch mathematician born in Belgium. He currently is a professor of mathematics at Columbia University. His research interests include arithmetic geometry and algebraic geometry.
Education.
De Jong attended high school in The Hague, obtained his master's degree at Leiden University and earned his doctorate at the Radboud University Nijmegen in 1992, under supervision of Frans Oort and Joseph H. M. Steenbrink.
Career.
In 1996, de Jong developed his theory of alterations which was used by Fedor Bogomolov and Tony Pantev (1996) and Dan Abramovich and de Jong (1997) to prove resolution of singularities in characteristic 0 and to prove a weaker result for varieties of all dimensions in characteristic "p" which is strong enough to act as a substitute for resolution for many purposes.
In 2005, de Jong started the Stacks Project, "an open source textbook and reference work on algebraic stacks and the algebraic geometry needed to define them." The book that the project has generated currently runs to more than 6,000 pages as of March 2018.
Awards and honors.
In 1998 he was an Invited Speaker of the International Congress of Mathematicians in Berlin. He won the Cole Prize in 2000 for his theory of alterations. In the same year, De Jong became a correspondent of the Royal Netherlands Academy of Arts and Sciences.
Personal life.
De Jong lives in New York City with his wife, Cathy O'Neil, and their three sons.