Chol Park

Education and Employment

• Associate Professor, Ulsan National Institute of Science and Technology, Mar. 2024 - present

• Visiting Professor, University of Toronto, Feb. 2025 - Jan. 2026 (sabbatical year)

• Assistant Professor, Ulsan National Institute of Science and Technology, Feb. 2019 - Feb. 2024

• CMC Fellow, Korea Institute for Advanced Study, Sep. 2018 - Jan. 2019

• Research Fellow, Korea Institute for Advanced Study, Aug. 2015 - Aug. 2018 (Mentor: Youn-Seo Choi)

• Postdoctoral Fellow, Max Planck Institute for Mathematics, Bonn, Aug. 2014 - July 2015

• Postdoctoral Fellow, University of Toronto, July 2013 - June 2014 (Mentor: Florian Herzig)

• Ph. D., University of Arizona, May 2013 (Advisor: David Savitt)

Research Interests

• Mod-p / p-adic aspects of Langlands program

• (Integral) p-adic Hodge theory

Papers

• On the geometric Breuil--Mézard conjecture for GL₂(ℚₚ²) in the semi-stable setting (with S. Han, H. Kim)
  in preparation.

• On families of strongly divisible modules of rank 2 (with S. Han)
  submitted, 141 pages pdf.

• Moduli of Fontaine--Laffaille representations and a mod-p local-global compatibility result (with D. Le, B. Le Hung, S. Morra, Z. Qian)
  Mem. Amer. Math. Soc. 312 (2025), no.1584, v+191 pages pdf.

• Colength one deformation rings (with D. Le, B. Le Hung, S. Morra, Z. Qian)
  Trans. Amer. Math. Soc. 377 (2024) 5749--5786 pdf. 

• Semi-stable deformation rings in even Hodge--Tate weights: the residually reducible case (with W. Lee)
  Int. J. Number Theory 18 (2022),  no.10, 2171--2209 pdf.

• On mod p local-global compatibility for GLₙ(ℚₚ) in the ordinary case (with Z. Qian)
  Mém. Soc. Math. France 173 (2022) vi+150 pages pdf.

• A classification of Breuil modules
  Israel J. Math. 242 (2021) 605–635 pdf.

• Semi-stable deformation rings in even Hodge--Tate weights (with L. Guerberoff)
  Pacific J. Math. 298(2) (2019) 299--374 pdf.

• On mod p local-global compatibility for GL₃(ℚₚ) in the non-ordinary case (with D. Le, S. Morra)
  Proc. Lond. Math. Soc. 117 (2018) 790--848 pdf.

• Serre weights for three-dimensional ordinary Galois representations (with S. Morra)
  J. Lond. Math. Soc. 96 (2017) 394--424 pdf.

• Reduction modulo p of certain semi-stable representations
  Trans. Amer. Math. Soc. 369 (2017) 5425--5466 pdf.

• Regular filtered (ϕ,N)-modules of dimension  3
  J. Number Theory 163 (2016) 406--433 pdf.

• Semi-stable deformation rings in Hodge--Tate weights (0,1,2)
  Thesis, University of Arizona (2013).

Grants / Awards / etc.

• Basic Research Lab (BRL), National Research Foundation of Korea (Co-I), June 2025 -- May 2028.

• Grant from National Research Foundation (Mid-Career Program), Mar. 2025 -- Feb. 2030.

• KIAS Alumni Academic Award, Korea Institute for Advacned Study, 2023.

• Grant from Samsung Science & Technology Foundation (PI), Aug. 2020 -- July 2025.

• Basic Research Lab (BRL), National Research Foundation of Korea (Co-I), July 2020 -- Feb. 2023.

• Posco TJ Park Science Fellowship for Young Professors, 2020.

• Associate Member, Korea Institute for Advanced Study, Apr. 2019 -- Feb. 2020.

• KIAS Research Fellow Award, Korea Institute for Advanced Study, 2016.
  
  

Teaching

Spring 2024

• • Modern Algebra I

Fall 2023

• • Algebraic Topology

Spring 2023

• • Advanced Algebra

Fall 2022

• • Elementary Number Theory

Spring 2022

• • Algebraic Geometry II

Fall 2021

• • Algebraic Geometry I

  • Modern Algebra II

Spring 2021

• • Modern Algebra I

Students

Current:

• • Jeonghyeon Yoo (since Spring 2025)

  • Hyeonmin Kim (since Fall 2023)

  • Seongjae Han (since Spring 2022)

  • Euntaek Lee (since Spring 2021)

Former:

• • Hyeonmin Cheon (Ms in 2023, currently PhD program at Indiana Univ.)

Upcoming Events / Useful Links

• French-Korean Conference 2025

• Samsung Global Research Symposium 2025

• Arxiv-Number Theory

• UNIST Number Theory Group

• University of Toronto Number Theory Seminar

• Korea--France Number Theory Seminar

• Spring school towards mod-p Langlands correspondence.