Hahn Lheem

Equipe Théorie des nombres

Institut de Mathématiques de Jussieu-Paris Rive Gauche (UMR7586)

About

I am a first year Ph.D. student in Mathematics at the Institut de Mathématiques de Jussieu-Paris Rive Gauche (IMJ-PRG). I am advised by Loïc Merel and Olivier Fouquet.

I completed my undergraduate degree in mathematics at Harvard, where I was supervised by Barry Mazur for my senior honors thesis. Afterwards, I completed the M2 master's program in mathématiques fondamentales at Sorbonne Université, where I was supervised by Christophe Cornut.

I was involved in the PROMYS program for several years, both as a student and counselor. I originally hail from North Carolina.

Research Interests

Special values of L-functions, Harris-Venkatesh Conjecture, modular forms (especially those of weight 1), Stark conjectures, eigenvarieties

Contact

Email:
first [dot] last [at] imj-prg [dot] fr
Office:
Sophie Germain 747
Address:
Université Paris-Cité Bâtiment Sophie Germain 8 Place Aurélie Nemours 75013 Paris, France

Activities

I am currently co-organizing a learning seminar on p-adic Hodge theory with a view towards p-adic L-functions with Zheng Wang. You can find the notes for my talks below.

Conferences that I have attended/plan to attend:

  • (May 18-22, 2026 in NYC) The Eisenstein Ideal and Galois Representations: Looking Forward after 50 Years. link
  • (Jan 26-30, 2026 at CIRM) Around the Langlands program, Week 1: Winter School on Galois representations and automorphic forms. link
  • (Oct 27-31, 2025 at IHES) New Structures and Techniques in p-adic Geometry. link

Notes & Expository

to be added

Affiliations

  • I spent five summers at the PROMYS program (Student 2017-18, Junior Counselor 2019, Counselor 2022, Head Counselor 2024).
  • I helped organize the Harvard-MIT Mathematics Tournament (HMMT) for three years (Problem Staff 2019-21, Community Coordinator 2021-22).
  • I sang in the Harvard Glee Club for three years (2021-24).