🎓About Me
Hi! My name is Kam Chuen Tung (I usually go by Alex) and I am from Hong Kong. I recently obtained my PhD in Computer Science from the University of Waterloo, advised by Prof. Lap Chi Lau, and I will start working at SIG as a Quantitative Systematic Trader in June 2025. Prior to my PhD studies, I obtained a BSc in Mathematics (minor in French) from the Chinese University of Hong Kong. I am known as alex20030190 on Codeforces.
I like writing, solving puzzles, and choir singing.
Publications
(2025).
Reweighted Eigenvalues: A New Approach to Spectral Theory beyond Undirected Graphs.
PhD Thesis.
(2023).
Online Algorithms for Spectral Hypergraph Sparsification.
In IPCO 2024.
(2023).
Fast Algorithms for Directed Graph Partitioning Using Flows and Reweighted Eigenvalues.
In SODA 2024.
(2022).
Cheeger Inequalities for Directed Graphs and Hypergraphs Using Reweighted Eigenvalues.
In STOC 2023.
(2022).
Cheeger Inequalities for Vertex Expansion and Reweighted Eigenvalues.
In FOCS 2022.
Recent Blog Posts