Xinyu Fang

About

I am a third-year PhD student in Mathematics at Harvard University. My advisor is Professor Bjorn Poonen. 

I am broadly interested in number theory, arithmetic geometry, and arithmetic statistics. Specifically, I am interested in rational points on varieties, the Brauer-Manin obstruction on cubic surfaces, and some questions in arithmetic statistics

I graduated from National University of Singapore with a Bachelor's degree in Science (with Honours), majoring in Mathematics. My undergraduate advisor was Professor Wee Teck Gan.

You can reach me at: xinyufang@math.harvard.edu

Research papers. 

CV.

News

• I am a Problem Session Leader for the course Quaternion Algebras at the Preliminary Arizona Winter School 2026 virtual program.

• I recently put out a preprint Galois group of exceptional curves on the generic del Pezzo surface on arXiv.