Hello!

I’m Gahl, a third year math PhD candidate at the University of Michigan. I previously earned a math B.S. from UCSB in the College of Creative Studies. I’m interested in Steinberg modules and the cohomology of arithmetic groups, and generally excited to learn more group (co)homology and combinatorial topology/commutative algebra. My advisor is Jenny Wilson.

I’m very grateful to be supported by an NSF Graduate Research Fellowship and a Rackham Merit Fellowship (Rackham Science Award).

Beyond learning and doing math, I enjoy teaching math, playing soccer, reading, skateboarding, skiing, hiking, thrifting, and speaking Hebrew & French.

Do not hesitate to reach out!

Teaching

• UM Math 115 (Calc I) (Fall 2023, Winter 2024)
• UM Math 116 (Calc II) (Winter 2025)

Activities

I am on the executive board of Michigan’s Association for Women in Math, serve as a mentor and organizer for Michigan’s Directed Reading Program in Mathematics, and volunteer at Super Saturdays!

Sadie Lipman and I organized the 2025 Michigan summer minicourses.

Expository

• An intro to vanishing theorems in local cohomology, written as a final project for UM Math 614 (Commutative Algebra), Fall 2023.

Papers

• Topology of augmented bergman complexes with E. Bullock, A. Kelley, V. Reiner, K. Ren, D. Shen, B. Sun, A. Tao, and Z. Zhang (Electronic Journal of Combinatorics).
• On the Cauchy transform of the complex power function with B. Faktor and M. Kuhn (Ball State Mathematics Exchange).

Other

• Modular principal series representation of GL2 over finite rings.
• Lattice models and puzzles for Dual Weak symmetric Grothendieck Polynomials with E. Bullock, N. Caplinger, A. Chin, N. Davis, and C. Frechette.

Talks

• UM Student Commutative Algebra: Progress in Big & Small Cohen-Macaulay Modules (Mar 2024)
• UM Student Commutative Algebra: Introduction to Group Cohomology (Oct 2024)
• UM Student Dynamics/ Geometry/ Topology: Poincaré Duality Groups (Nov 2024)
• UM Student Commutative Algebra: Cohen-Macaulay Simplicial Complexes (Apr 2025)