Xiaolong Han (韩晓龙)

Department of Mathematics

California State University, Northridge (CSUN)

Northridge, CA 91330, USA

Phone: 1 # 818 # 677 # 2710

Email: xiaolong.han at csun.edu

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Another mathematician Xiaolong (Hans) Han (韩肖垄)

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Here is my CV.

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Research interests: Microlocal and semiclassical analysis, harmonic analysis, spectral and scattering theory, quantum chaos.

A list of my articles is available on arXiv and MathSciNet (authentication required).

Research articles in chronological order:

•      Small scale quantum ergodicity in cat maps. II. Quasimodes that are not equidistributed at the logarithmical scales.

•      Small scale quantum ergodicity in cat maps. I.

•      Spherical harmonics and point configurations on the sphere. To appear in Geometric and Functional Analysis.

•      Fractal uncertainty principle for random Cantor sets, with P. Salekani. To appear in Journal of the Australian Mathematical Society.

•      The semiclassical measure of certain spherical harmonics on S3. To appear in Indiana University Mathematics Journal.

•      Fractal uncertainty principle for discrete Cantor sets with random alphabets, with S. Eswarathasan. Mathematical Research Letters, 2023.

•      Riemann moduli spaces are quantum ergodic, with D. Baskin and J. Gell-Redman. Journal of Differential Geometry, 2023.

•      From nodal points to non-equidistribution at the Planck scale. Comptes Rendus Mathématique, 2022.

•      Tomas-Stein restriction estimates on convex cocompact hyperbolic manifolds, International Mathematics Research Notices, 2021.

•      Equidistribution of random waves on small balls, with M. Tacy. Communications in Mathematical Physics, 2020.

•      Nodal lengths of eigenfunctions in the disc, with M. Murray and C. Tran. Proceedings of the American Mathematical Society, 2019.

•      Lp bilinear quasimode estimates, with Z. Guo and M. Tacy. Journal of Geometric Analysis, 2019.

•      Distribution of the nodal sets of eigenfunctions on analytic manifolds. Journal of Spectral Theory, 2018.

•      Small scale equidistribution of random eigenbases. Communications in Mathematical Physics, 2017.

•      Spherical harmonics with maximal Lp (2<p<=6) norm growth. Journal of Geometric Analysis, 2016.

•      Small scale quantum ergodicity in negatively curved manifolds. Nonlinearity, 2015.

•      Sharp norm estimates of layer potentials and operators at high energy, with M. Tacy and an appendix by J. Galkowski. Journal of Functional Analysis, 2015.

•      Completeness of boundary traces of eigenfunctions, with A. Hassell, H. Hezari, and S. Zelditch. Proceedings of the London Mathematical Society, 2015.

•      Existence of maximizers for Hardy-Littlewood-Sobolev inequalities on the Heisenberg group. Indiana University Mathematics Journal, 2013.

•      Hardy-Littlewood-Sobolev and Stein-Weiss inequalities and integral systems on the Heisenberg group, with G. Lu and J. Zhu. Nonlinear Analysis, 2012.

•      On regularity of solutions to an integral system associated with Bessel potentials, with G. Lu. International Journal of Mathematics, 2012.

•      Dual spaces of weighted multi-parameter Hardy spaces associated with the Zygmund dilation, with G. Lu and Y. Xiao. Advanced Nonlinear Studies, 2012.

•      Characterization of balls in terms of Bessel-potential integral equation, with G. Lu and J. Zhu. Journal of Differential Equations, 2012.

•      Regularity of solutions to an integral equation associated with Bessel potential, with G. Lu. Communications on Pure Applied Analysis, 2011.

•      A geometric covering lemma and nodal sets of eigenfunctions, with G. Lu. Mathematical Research Letters, 2011.

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Seminar notes:

•      Problems.

•      Harmonic functions and nodal sets by Logunov-Malinnikova.

•      Dynamical zeta functions for Anosov systems via microlocal analysis by Dyatlov-Zworski.

•      Classical ergodicity.

•      Intersecting Lagrangian distributions by Melrose-Uhlmann.

•      Fourier integral operators by Duistermaat-Hörmander.

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Lecture notes:

•      Complex Analysis.

•      Real Analysis.

•      Topology.

•      Mathematical Analysis.

•      Differential Equations.

•      Introduction to Probability.

•      Applied Differential Equations.

•      Calculus III.

•      Calculus I.

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Miscellany notes:

•      Develop a personal teaching style.

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Editorial:

•      I am an editor of Mathematics Exchange. Please email me if you wish to submit a paper.

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Courses taught at CSUN:

•      MATH 655, Complex Analysis.

•      MATH 651A, Advanced Topic in Analysis: Harmonic Functions and Nodal Sets.

•      MATH 552, Real Analysis.

•      MATH 550, Calculus on Manifolds.

•      MATH 501, Topology.

•      MATH 450B, Advanced Calculus II.

•      MATH 450A, Advanced Calculus I.

•      MATH 351, Differential Equations.

•      MATH 340, Introduction to Probability and Statistics.

•      MATH 280, Applied Differential Equations.

•      MATH 250, Calculus III.

•      MATH 150A, Calculus I.

•      MATH 102, Pre-Calculus I.

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Students supervised at CSUN:

•      2023 Fall, K. Jannati, M.S. in Mathematics. Thesis: A fractal uncertainty principle of discrete Fourier transform on Cantor sets.

•      2022 Fall, K. Schmidt, M.S. in Mathematics. Thesis: Dvir’s solution to the Kakeya conjecture in finite fields.

•      2022 Spring, J. Horowitz, M.S. in Mathematics. Thesis: Hyperbolic toral automorphisms: A case study of mathematical chaos.

•      2020 Fall, D. Nolasco, M.S. in Mathematics. Thesis: Riemann zeta function and the prime number theorem.

•      2020 Spring, A. Britton, M.S. in Mathematics. Thesis: Harmonic functions and nodal sets.

•      2019 Spring, M. Murray, M.S. in Mathematics. Thesis: Nodal lengths of eigenfunctions in the disc.

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Collaborators:

•      Dean Baskin

•      Suresh Eswarathasan

•      Jeff Galkowski

•      Jesse Gell-Redman

•      Zihua Guo

•      Andrew Hassell

•      Hamid Hezari

•      Guozhen Lu

•      Michael Murray

•      Pouria Salekani

•      Melissa Tacy

•      Chuong Tran

•      Yayuan Xiao

•      Steve Zelditch (1953-2022)

•      Jiuyi Zhu