I am a postdoctoral student at the University of Michigan since Fall 2021. I have previously been affiliated with Leiden University, where I did my PhD under the supervision of Jan-Hendrik Evertse and Peter Stevenhagen, and the Max Planck Institute for Mathematics in Bonn. My PhD thesis is freely available here. I am interested in number theory and surrounding areas, in particular the distribution of class groups, the circle method and Diophantine equations.
Here is a Quanta Magazine article about my recent work.
koymans (at) umich (dot) edu
University of Michigan
East Hall, Office 1842
Ann Arbor, Michigan, USA