Greetings. I am a PhD candidate at the University of British Columbia (UBC) working with Malabika Pramanik and Joshua Zahl. I am interested in Harmonic Analysis.
Prior to coming to UBC, I did my master's degree at Peking University (PKU) with Baoping Liu. Before that, I was an undergraduate of Beijing University of Posts and Telecommunications (BUPT).
Email: chjwang@math.ubc.ca.
Preprints
The Kakeya problem for codimension-two planes in $\mathbb{R}^n$, with Chun Kit Lai, Yixuan Pang, Rahul Sethi.
Weighted mixed-norm estimates for circular averages and exceptional set estimates for the wave equation, with Yixuan Pang.
Slides and notes
Volume estimates for unions of convex sets, and the Kakeya set conjecture in three dimensions after H. Wang and J. Zahl, with Sam Craig, Peiqi Nie, Yixuan Pang. Full slides.
Kakeya conjecture over $\mathbb Z/ N\mathbb Z$ after M. Dhar, with Xu Zheng.
A Roth-type theorem for dense subset of $\mathbb R^d$ after B. Cook, A. Magyar and M. Pramanik, with Angel Cruz. Slides.
Harmonic analysis seminar at UBC
High/low method in harmonic analysis (Fall 2025) Notes
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At UBC, besides answering general questions at the Math Learning Centre (MLC), my teaching assistantship duties include providing feedback on homework submissions, tutoring students online, creating engaging problems to meet desired learning outcomes, and grading for the midterm/final exams.
As a teaching assistant, I supported the following courses.
2026 Fall: MATH 220: Mathematical Proofs
2025 Spring/Fall: MATH 256: Differential Equations /MATH 215: Elementary Differential Equations I
2024 Spring/Fall: MATH 215: Elementary Differential Equations I/MATH 253: Multivariable Calculus
2023 Spring/Fall: MATH 227: Advanced Calculus/MATH 120: Honors Differential Calculus