Ruihan Xu

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I am a student in Physical Science Division (PSD) of the university of chicago. I received my bachelor's degree in Mathematics and Applied Mathematics from Shanghai Jiao Tong university in 2024.

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I am interested in a wide range of topics related to applied mathematics, and I am always exploring new math problems during my research. Currently my interests are around:

  • Sampling

    • Markov chain Monte Carlo (MCMC)

    • Glauber Dynamics (optimal mixing time and its implications for modern machine learning)

    • Stochastic Localization (the theory framework for analyzing MCMC, and its implication for sampling and machine learning)

    • Optimal transport (the theory (Diffusions, Gradient Flow), and its applcation in machine learning)

  • Computation

    • Large-scale Matrix (tensor) Problem (especially randomized algorithm for the least-squares, eigenvalue problems)

    • Random Matrix theory (theoretical guarantee for structured random matrix)

  • Machine Learning

    • Training Dynamics and Optimizer Design

    • Probability Model

    • Online Learning

My goals have been about two part

  • Develop theoretical insights in computational science that can more practically inform algorithmic design and implementation.

  • Explore new paradigms for the development of AI, enlightened by applied math/physics.

e-mail: ruihanx@uchicago.edu




More about Ruihan:

  • lifelong leaner, interest driven

  • doing sports is part of my life, bouldering recently, basketball before (I still can dunk)

  • amateur pianist, music making