About me I am a postdoctoral associate at Western University. I received my Ph.D in mathematics in May 2024 at the University of Pennsylvania. My advisor is Julia Hartmann. My research interests include arithmetic and algebraic geometry and algebraic number theory. In particular, local-global principles, algebraic groups and differential Galois theory. Here is my CV. Before Penn, I was an undergraduate student at the University of California, Berkeley. Office: Middlesex College 120 Email: ywan6443 at uwo dot ca