About

Welcome! I am a (tenure-track) Richard Duke Assistant Professor in the School of Math at Georgia Tech.

In Fall 2026, I am teaching Math 3012, Applied Combinatorics.

In Spring 2027, I am teaching Math 7018, Probabilistic Combinatorics, and Math 8803-XHE (Topics in Mathematical AI Safety).

My research interests are extremal, probabilistic, and algebraic combinatorics, especially Ramsey theory, graph coloring, additive combinatorics, discrete geometry, and coding theory, and their applications to computer science.

I am also interested in AI Safety.

Previously, I was an NSF postdoctoral research fellow at Princeton University working with Noga Alon. Before that, I received my PhD in mathematics from Stanford University in 2021, where my advisor was Jacob Fox.

You can find my CV here. I blog about life, research, and rationality at my personal blog; most of my better posts can also be found cross-posted on LessWrong.

Current group

Jiaxi Nie (Visiting Assistant Professor)
Fei Peng (Visiting Assistant Professor)
Ruben Ascoli (ACO PhD Student)
Winston Stucki (SoM PhD Student)
Logan Post (ACO PhD Student)

If you are a student interested in working with me, please reach out after taking a look at problems and my blog to get a sense of my research interests and philosophy.

This cycle, I am hiring for a Visiting Assistant Professor position (a three-year postdoc) in Mathematical AI Safety (broadly construed). Please apply through MathJobs by November 1, 2026, and feel free to contact me if you have any questions.

Contact: xhe399 [at] gatech [dot] edu

Office: Skiles 260