About Me
I am a first-year PhD student studying theoretical computer science (TCS) in CMU, co-advised by William Kuszmaul and Guy Blelloch. I completed my Bachelor’s degree in Yao Class, Tsinghua University.
I mainly work on classical data structures, especially hash tables and succinct data structures. I also work on fast matrix multiplication.
SODA 2025 Schedule
Here is the schedule of SODA 2025 where concurrent sessions appear in parallel.
HTML: [Day1] [Day2] [Day3] [Day4]
PDF: [Day1] [Day2] [Day3] [Day4]
Official schedule: [Online Program] [Speaker Index] [Special Events]
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Selected Publications
- More Asymmetry Yields Faster Matrix Multiplication
with Josh Alman, Ran Duan, Virginia Vassilevska Williams, Yinzhan Xu, and Zixuan Xu
In SODA 2025 - Tight Bounds and Phase Transitions for Incremental and Dynamic Retrieval
with William Kuszmaul, Aaron Putterman, Tingqiang Xu, and Hangrui Zhou
In SODA 2025 - Tight Bounds for Classical Open Addressing
with Michael A. Bender and William Kuszmaul
In FOCS 2024 - New Bounds for Matrix Multiplication: from Alpha to Omega
with Virginia Vassilevska Williams, Yinzhan Xu, and Zixuan Xu
In SODA 2024
Covered in Quanta Magazine - Dynamic Dictionary with Subconstant Wasted Bits per Key
with Tianxiao Li, Jingxun Liang, and Huacheng Yu
In SODA 2024 - Dynamic “Succincter”
with Tianxiao Li, Jingxun Liang, and Huacheng Yu
In FOCS 2023 - Tight Cell-Probe Lower Bounds for Dynamic Succinct Dictionaries
with Tianxiao Li, Jingxun Liang, and Huacheng Yu
In FOCS 2023
Covered in Quanta Magazine - Faster Matrix Multiplication via Asymmetric Hashing
with Ran Duan and Hongxun Wu
In FOCS 2023
Covered in Quanta Magazine
Misc
Chinese name: 周任飞
Pronunciation of my name: Renfei [ˈrɛnˌfeɪ], Zhou [ˈʒoʊ]. Sounds like “Ren-fay Joe”.
Sports: ping-pong, cycling (had a trip from Hangzhou to Beijing, 1700km on bike)
Erdős number: 4