Hi
there!
My name is
Qingyuan Bai (白庆源)
and I'm a PhD
student in Mathematics at Københavns
Universitet. Starting from September of 2025, I am unemployed.
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.
So far, my
research is mostly on higher algebra inspired by homological mirror symmetry.
Other than that, I daydream about fancier things like motives, higher
categories and Langlands duality.
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 (draft)
Joint
with Yuxuan Hu. Draft vailable upon request. See also Remark 12 in 3 below.
3.
Stuff about sheaves on real vector spaces. pdf
Joint
with Robert Burklund. Expository note.
4.
On the K-theory of non-split tori.
Joint
with Shachar Carmeli, Branko Juran and Florian Riedel. In preparation. 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
Fall
2024: I am currently organizing Copenhagen homotopy theory problem solving
seminar, it happens every Friday during lunchtime. Ask me for details if you
want to join.
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.