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　　From July 21 to 25, 2025, Professor Xu Yang from the Department of Mathematics at the University of California, Santa Barbara, was invited to give a talk. The title is "Asymptotic Analysis Across Scales: From Singular Perturbations to Multiscale Modeling in Physics". For more information, see the poster.

　　Xu Yang , Professor of Mathematics at the University of California, Santa Barbara, has long been engaged in research in applied analysis and numerical computation. His work is physics-motivated, spanning multiple cutting-edge areas, including semiclassical analysis, wave propagation, high-frequency computation, seismic imaging, quantum dynamics, and materials science modeling. He previously conducted postdoctoral research at Princeton University and the Courant Institute of Mathematical Sciences at New York University. He has achieved a series of significant results in the Frozen Gaussian method, photonic graphene, Schrödinger equations with random perturbations, and multiscale quantum system modeling.

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