# Chol Park

박 철

Associate Professor

Nat. Sci. Bldg (108), Room 301-14

Dept. of Mathematical Sciences, UNIST

UNIST-gil 50, Ulsan 44919, S. Korea

Contact Information

+82-52-217-2533 (office)

+82-52-217-2219 (fax)

cholpark"at"unist.ac.kr

## Education and Employment

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

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

Weight part of Serre's conjecture.

Breuil--Mezard conjecture.

Mod-p local-global compatibility.

Emerton--Gee stacks.

Local models for Galois deformation rings.

## Papers

On families of strongly divisible modules of rank 2 (with S. Han)

in preparation.Colength one deformation rings (with D. Le, B. Le Hung, S. Morra, Z. Qian)

Trans. Amer. Math. Soc. 377 (2024) 5749--5786 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. (to appear), 169 pages pdf.Semi-stable deformation rings in even Hodge--Tate weights: the residually reducible case (with W. Lee)

Int. J. Number Theory 18 no.10 (2022) 2171--2209 pdf.A classification of Breuil modules

Israel J. Math. 242 (2021) 605–635 pdf.On mod p local-global compatibility for GL_n(Q_p) in the ordinary case (with Z. Qian)

Mém. Soc. Math. France 173 (2022) vi+150 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 GL_3(Q_p) 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.

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

Grant from Samsung Science & Technology Foundation (PI), Aug. 2020.

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:

Hyeonmin Kim (Ph.D. expected in 2029)

Seongjae Han (Ph.D. expected in 2027)

Euntaek Lee (Ph.D. expected in 2027)

Former:

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