My name is
Qingyuan Bai (白庆源)
and this page collects some of the pdfs I wrote. Since September of 2025, I am
unemployed.
I was a PhD
student in Mathematics at Københavns
Universitet.
Before
moving to Copenhagen, I was a master student at Peking University supervised by Bohan Fang.
Even before
that I got my bachelor degree from Sichuan University,
where I learnt a lot from Xiaojun
Chen.
Writings
1.
Topological Fukaya category and mirror symmetry for toric Calabi-Yau
3-orbifolds. arXiv
Joint
with Bohan Fang. Accepted by Mathematical Research Letters.
2.
Toric mirror symmetry for homotopy theorists. pdf
Joint
with Yuxuan Hu.
3.
A study of sheaves on real vector spaces. pdf
Joint
with Robert Burklund.
4.
On the K-theory of non-split tori. arXiv
Joint
with Shachar Carmeli, Branko Juran and Florian Riedel. Shachar Carmeli gave a talk
on this project.
5.
On the localizing invariants of category of constructible sheaves.
Joint
with Peter Haine. In preparation. Peter
Haine’s Masterclass lecture notes explained some
ideas surrounding this project.
Events
Masterclass:
Proof of the geometric Langlands conjecture
Fall
2024: Copenhagen homotopy theory problem solving seminar
Masterclass:
Continuous K-theory, dualizable and rigid categories
Masterclass:
Exit paths and stratified homotopy types
Teaching
2022
Fall: Exercise session for Geometric Topology (Morse Theory)
2024
Spring: Exercise session for Commutative Algebra
2024
Fall: Exercise session for Algebraic Geometry 2 (Scheme Theory)
Contact
You
know how to reach me.