Yujin H. Kim

Hi! I'm Yujin, a Ph.D. student in mathematics at the Courant Institute of NYU, graduating in May 2025. I am very fortunate to be advised by Eyal Lubetzky and Ofer Zeitouni.

For Fall 2024, I am a Junior Fellow at the Institut Mittag-Leffler for the program Random Matrices and Scaling Limits. In Fall 2021, I was a Program Associate at SLMath (formerly, MSRI) for Universality and Integrability in Random Matrix Theory and Interacting Particle Systems. Before graduate school, I studied mathematics at Columbia University.

Broadly speaking, I am interested in probability theory and its applications. Currently, I am thinking about the extrema of log-correlated fields, multiplicative chaos, branching diffusions and their connections with reaction-diffusion PDEs, random matrix theory, and lattice models in statistical physics. My research is partially supported by an NSF Graduate Research Fellowship and a MacCracken Fellowship.

You can reach me at first name [dot] last name [at] courant.nyu.edu. If you're at Courant, visit me in office 1003!

You can find my CV here.

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Research (in reverse order of arXiv appearance)
Absolute continuity of non-Gaussian and Gaussian multiplicative chaos measures
with Xaver Kriechbaum.
Submitted, 2024. (arXiv)
The shape of the front of multidimensional branching Brownian motion
with Ofer Zeitouni.
Submitted, 2024. (arXiv, slides-- also reviews papers "extremal" and "maximum" below)
On level line fluctuations of SOS surfaces above a wall
with Patrizio Caddeo and Eyal Lubetzky.
Forum of Mathematics, Sigma, 2024. (arXiv)
KPP traveling waves in the half-space
with Julien Berestycki, Cole Graham, and Bastien Mallein.
Submitted, 2023. (arXiv)
The extremal point process of branching Brownian motion in \R^d
with Julien Berestycki, Eyal Lubetzky, Bastien Mallein, and Ofer Zeitouni.
Annals of Probability, 2024. (arXiv, short video, more detailed video)
The maximum of branching Brownian motion in \R^d
with Eyal Lubetzky and Ofer Zeitouni.
Annals of Applied Probability, 2023. (video)
The lower tail of the half-space KPZ Equation
Stochastic Processes and its Applications, 2021.
A refined conjecture for the variance of Gaussian primes across sectors
with R. C. Chen, J. D. Lichtman, S. J. Miller, A. Shubina, S. Sweitzer, E. Waxman, E. Winsor, and J. Yang.
Experimental Mathematics, 2020.
Lower-order biases in the second moments of Dirichlet coefficients in families of L-functions
with M. Asada, R. C. Chen, E. Fourakis, A. Kwon, J. D. Lichtman, B. Mackall, S. J. Miller, E. Winsor, K. Winsor, J. Yang, and K. Yang.
Experimental Mathematics, 2021.
Spectral statistics of non-Hermitian random matrix ensembles
with R. C. Chen, J. D. Lichtman, S. J. Miller, A. Shubina, and S. Sweitzer.
Random Matrices: Theory and Applications, 2020.
Limiting distributions in generalized Zeckendorf decompositions
with G. Carty, A. Gueganic, S. J. Miller, A. Shubina, S. Sweitzer, E. Winsor, and J. Yang.
The Fibonacci Quarterly, 2019.
Anomalous primes and the elliptic Korselt criterion
with L. Babinkostova, J.C. Bahr, E. Neyman, and G. K. Taylor.
Journal of Number Theory, 2019.
On orders of elliptic curves with fixed j-invariants
with J.C. Bahr, E. Neyman, and G. K. Taylor.
Rose-Hulman Undergraduate Mathematics Journal, 2019.
Talks and Presentations

  • Lehigh University-University of Minnesota Joint Probability Seminar, Nov. 2024.
  • Stanford University, Probability Seminar, Sep. 2024.
  • CRM-ISM Montreal Probability Seminar, Sep. 2024.
  • Seoul National University, Probability Seminar, Jun. 2024.
  • University of Chicago, Probability and Statistical Physics Seminar, May 2024.
  • University of Pennsylvania/Temple University Probability Seminar, Apr. 2024.
  • Los Angeles Probability Forum, Apr. 2024.
  • Hong Kong University of Science and Technology, Probability Seminar, Jan. 2024.
  • KTH Royal Institute of Technology, Probability Seminar, Dec. 2023.
  • Northeast Probability Seminar, Nov. 2023.
  • University of Maryland, Probability Seminar, Oct. 2023.
  • University of Oxford, Probability Seminar, Jun. 2023.
  • Columbia University, Columbia Probability Workshop, May 2023.
  • Brin Mathematics Research Center, Workshop on Branching Processes and Reaction-Diffusion Equations, Mar. 2023.
  • Northeast Probability Seminar, Nov. 2021.
  • SLMath (formerly MSRI), Programs Associates' Short Talks, Sep. 2021.
  • Stanford University, Student Probability Seminar, Apr. 2021.
  • Joint Mathematics Meetings, AMS Special Session on Discrete Neural Networking, Jan. 2018 (w/ Eric Winsor).
  • Joint Mathematics Meetings, Undergraduate Poster Session, Jan. 2018.
  • Maine-Quebec Number Theory Conference, Oct. 2017 (w/ Shannon Sweitzer).
  • Joint Mathematics Meetings, Undergraduate Poster Session, Jan. 2017.
  • INTEGERS Conference, Oct. 2016.
Seminars Organized

At Courant, I co-organize the Student Probability Seminar. If you are interested in speaking at this seminar, please feel free to shoot me an email. In the past, I co-organized the Graduate Student/Postdoc Seminar, as well as the MSRI Program Associates' Seminar with Weitao Zhu.


"[Fourier] had the opinion that the principal aim of mathematics was public utility and explanation of natural phenomena; but a philosopher like him should have known that the sole end of science is the honor of the human mind." — Jacobi, in a letter to Legendre (1830).