Photo by Yuxin Yan
I am a 4th-year Ph.D. candidate in the Department of Mathematics at Rice University, working with Alan Reid. Before Rice, I completed a B.S. in mathematics and applied mathematics at Jilin University (graduated 2019) and a M.S. in mathematics at Brandeis University (graduated 2021), advised by Kiyoshi Igusa.
My research interests are broadly in geometric group theory and low-dimensional topology. More specifically, I study profinite completions of mapping class groups and how profinite methods can be used to understand questions of rigidity, subgroup structure, and the relationship between geometric and algebraic invariants.
Email: zl152@rice.edu
Here is a copy of my CV (updated Oct 2025): liu_cv_2025
Research:
Scaled homology and topological entropy, with Bingzhe Hou and Kiyoshi Igusa, Proc. Amer. Math. Soc. Ser. B 10 (2023), 273–287.
You may have seen me (or might see me) at:
Introductory Workshop: Topological and Geometric Structures in Low Dimensions & Geometry and Dynamics for Discrete Subgroups of Higher Rank Lie Groups, (Simons Laufer Mathematical Sciences Institute, January 2026)
Workshop on hyperbolic geometry and geometric group theory (SIMIS, December 2025)
Computational problems about 3-manifolds, associated groups and varieties (Rutgers University, October 2025)
The William Rowan Hamilton Geometry and Topology Workshop (in honor of Martin Bridson) (Trinity College Dublin, June 2025)
Geometric Group Theory and Related Topics (Beijing International Center for Mathematical Research, June 2025)
Geometry and Topology of Polyhedral Complexes (in honor of Mike Davis) (The Ohio State University, May 2025)
Recent Development in Geometric Group Theory (The University of Tennessee, May 2025)
Hyperbolic Manifolds, Their Submanifolds and Fundamental Groups (IMPA, January 2025)
Shanghai Geometric Group Theory Workshop (Fudan University, July 2024)
Graduate Student Conference in Algebra, Geometry, and Topology (Temple University, May 2024)
Cornell Topology Festival (Cornell University, May 2024)
Graduate Student Topology and Geometry Conference 2024 (Michigan State University, April 2024)
Hot Topics: Artin Groups and Arrangements - Topology, Geometry, and Combinatorics (Simons Laufer Mathematical Sciences Institute, March 2024)
Riverside Workshop on Geometric Group Theory: January follow-up (University of California, Riverside, January 2024)
Texas Geometry and Topology Conference (Rice University, November 2023)
Geometry and topology of Artin groups (American Institute of Mathematics, September 2023)
Groups around 3-Manifolds (Centre de Recherches Mathématiques, June 2023)
Geometric Topology in New York (Columbia University, June 2023)
Geometry of Subgroups (Centre de Recherches Mathématiques, May 2023)
Redbud Topology Conference (University of Oklahoma, March 2023)
Riverside Workshop on Geometric Group Theory (University of California, Riverside, March 2023)
Graduate Combinatorics, Algebra, and Topology Conference (Binghamton University, November 2022)
Workshop on Big Mapping Class Groups (Boston College, August 2022)
Geometry, Arithmetic, and Groups (in honor of Alan Reid) (University of Texas, Austin, June 2022)
The Circle at Infinity (in honor of Curtis McMullen) (Harvard University, June 2022)
3-Manifolds, Groups, and Singularities (in honor of Walter Neumann) (Columbia University, June 2022)
Graduate Student Conference in Algebra, Geometry, and Topology (Temple University, May 2022)
Talks given:
SIMIS Geometry & Topology Seminar (November 2024)
Scaled homology and topological entropy (slides)
UCR Geometry & Topology Seminar (November 2024)
Scaled homology and topological entropy
Temple Graduate Student Conference in Algebra, Geometry, and Topology (May 2024)
Profinite rigidity
Graduate Student Topology and Geometry Conference 2024
Scaled homology and topological entropy
Riverside Workshop on Geometric Group Theory: January follow-up
From braid groups to Artin groups
Binghamton University Graduate Combinatorics, Algebra, and Topology Conference
Large scale homology
Rice Topology Seminar
Scaled homology and topological entropy
Texas A & M Graduate Student Concentration Week on Metric Geometry
Scaled homology and topological entropy
Temple Graduate Student Conference in Algebra, Geometry, and Topology
Large scale homology
Brandeis Topology Seminar
Scaled homology and topological entropy
Photo by Yuxin Yan