# Arthur Lei Qiu (he/him)

I am a PhD student in the University of Toronto's Department of Mathematics. This webpage is my attempt at trying something new: web development. Treat it as an exercise in HTML, because that's exactly what it is.

### Some topics I've written about

Gompf gluing and non-computability of classification, for a course on 4-dimensional manifolds that I took with Alexander Kupers in 2023.

The Cauchy problem for Einstein's vacuum equations, for a course on waves and black holes that I took with Yakov Shlapentokh-Rothman in 2023.

Simple homotopy equivalence, Whitehead groups, and Whitehead torsion, for a course on diffeomorphism groups that I took with Alexander Kupers in 2023.

Euler-like vector fields, for a course on symplectic geometry that I took with Yael Karshon in 2021. This was accompanied by a presentation and slides.

Black hole no-hair theorems, for a course on general relativity that I took with Stefan Czimek in 2020.

Regularity of elliptic partial differential equations, for an independent reading course I took with Fabio Pusateri in 2019.

### Some things I've done

I ran the 2023 TCS Toronto Waterfront Marathon and fundraised for the Princess Margaret Cancer Foundation along the way.

I ran the 2022 BMO Vancouver Marathon and fundraised for the BC Cancer Foundation along the way.

I computed the number of holes in a Minecraft world. (There's a lot. More details coming soon.)