Stefaan Vaes (born February 29, 1976, in Herentals, Belgium) is a Belgian mathematician.
Vaes studied mathematics at KU Leuven with a diploma in 1998 and a PhD in 2001 with thesis advisor Alfons Van Daele and thesis Locally Compact Quantum Groups.
[1] As a postdoc, he worked from 1998 to 2002 at KU Leuven and from 1998 to 2002 in Paris, where he did research for CNRS.
[2] His research deals with Von Neumann algebras and quantum groups.
In 2010, Vaes was an invited speaker with a talk on Rigidity for von Neumann algebras and their invariants at the International Congress of Mathematicians in Hyderabad.