Applied Mathematics Colloquium

Most seminars will take place on Tuesdays from 2:45-3:45 PM and will be offered in a hybrid format, unless otherwise noted. At this time, only Columbia University ID-holders and approved guests are invited to in-person talks. All others are invited to attend remotely.

Most seminars will take place on Tuesdays from 2:45-3:45 PM and will be offered in a hybrid format, unless otherwise noted. At this time, only Columbia University ID-holders and approved guests are invited to in-person talks. All others are invited to attend remotely.

Tuesday, 9/9/25
2:45-3:45 PM, 214 Mudd
Yekaterina Epshteyn, Univ of Utah
Multiscale Modeling, Simulation, and Analysis of Microstructure Evolution in Polycrystalline Materials"

Tuesday, 9/16/25
2:45-3:45 PM, 214 Mudd
Xiaochuan Tian, UCSD
"Sparse Radial Basis Function Networks for Solving Nonlinear PDEs"

Tuesday, 9/23/25
2:45-3:45 PM, 214 Mudd
Chenyang Zhong, Columbia University, Statistics
"Entropic Selection in Optimal Transport"

Thursday, 9/25/25 *Special Day/Time
1:00-2:00 PM, 214 Mudd
Anjali Nair, University of Chicago
"From Schrödinger to diffusion- speckle formation of light in random media and the Gaussian conjecture"

Tuesday, 9/30/25
2:45-3:45 PM, 627 Mudd
Dingxuan Zhou, The University of Sydney
"Mathematical theory of structured deep neural networks"

Wednesday, 10/1/25 *Special Day/Time
10:00-11:00 AM, 214 Mudd
Jie Shen, Eastern Institute of Technology
"Efficient and accurate structure preserving schemes for complex nonlinear systems"

Tuesday, 10/21/25
2:45-3:45 PM, 627 Mudd
Susan Minkoff, Brookhaven National Lab
"Extension Methods to Mitigate Cycle Skipping in Seismic Full Waveform Inversion"

Tuesday, 10/28/25
2:45-3:45 PM, 627 Mudd
Molei Tao, Georgia Institute of Technology
"Where do all the scores come from? - an end-to-end accuracy analysis of diffusion model, and multimodal sampling via diffusion annealing"

Tuesday, 11/25/25
2:45-3:45 PM, 627 Mudd
Hongkai Zhao, Duke
"Mathematical and Computational Understanding of Neural Networks: From Representation to Learning and From Shallow to Deep Abstract"

Tuesday, 2/24/26
2:45-3:45 PM, 233 Mudd
Weizhu Bao, National University of Singapore
 "Structure-preserving parametric finite element methods for geometric PDEs and applications"

Tuesday, 3/3/26
2:45-3:45 PM, 233 Mudd
John Ball, Heriot-Watt University, Edinburgh
"Highly irregular microstructures and TN configurations"

Tuesday, 3/10/26
2:45-3:45 PM, 233 Mudd
Junshan Lin, Auburn University
"Resonances through Subwavelength Holes: Theory, Computation and Applications"

Joint Distinguished Colloquium Series in Interdisciplinary and Applied Mathematics (DCSIAM) and Mathematics Colloquium
Wednesday, March 25, 2026
4:30-5:30 PM, Room 520, Mathematics Hall, 2990 Broadway
Javier Gomez-Serrano, Brown University
"AI-Driven Mathematical Discovery: Singularities, Algorithms, and Beyond"

Tuesday, 3/31/26
2:45-3:45 PM, 233 Mudd
Yifei Lou, University of North Carolina at Chapel Hill
"Hyperspectral Unmixing via Graph Regularizations, Active Learning, and Spectral Bundles"

Joint DSI-Applied Mathematics Colloquium
Tuesday, 4/7/26
2:45-3:45 PM, Room 412 CEPSR (DAVIS AUDITORIUM)
George Karniadakis, Brown University

Tuesday, 4/14/26 
2:45-3:45 PM, 233 Mudd
Florian Kogelbauer, ETH Zürich
"Hydrodynamic Manifolds for Kinetic Equations"

Tuesday, 4/28/26
2:45-3:45 PM, 233 Mudd
Per-Olof Persson, UC Berkeley
"High-Order Methods on Unstructured Meshes and AI-Driven Mesh Generation"

Wednesday, 9/4/24
2:00 PM, 210 Mudd (APAM Conference Room)
Jack Xin, UC Irvine
Computing Entropy Production Rates and Chemotaxis Dynamics in High Dimensions by Stochastic Interacting Particle Methods

Monday, 9/9/24
4:00-5:00 PM, 210 Mudd (APAM Conference Room)
David Keyes, KAUST
"Efficient Computation through Tuned Approximation"

Tuesday, 9/10/24
2:45-3:45 PM, 214 Mudd
Samuli Siltanen, University of Helsinki
"CT scans without X-rays: parallel-beam imaging from nonlinear current flows"

Tuesday, 9/17/24
2:45-3:45 PM, 214 Mudd
Nicolas Trillos, University of Wisconsin Madison
"Minimax rates for the learning of spectra of differential operators from data"

Tuesday, 9/24/24
2:45-3:45 PM, 214 Mudd
Micah Goldblum, Columbia University
"Bridging the gap between deep learning theory and practice"

Tuesday, 10/1/24
2:45-3:45 PM, 214 Mudd
Arian Maleki, Columbia University
"Image acquisition challenges in the presence of speckle noise"

Friday, 10/11/24
Joint Materials / Applied Math / DSI Colloquium
11:00 AM, 214 Mudd and Zoom
Vitaliy Kurlin, University of Liverpool
"The Crystal Isometry Principle"

Tuesday, 10/15/24
2:45-3:45 PM, 214 Mudd
Alexander B. Vladimirsky, Cornell University
"Stochastic switching systems: abrupt context changes and structured uncertainty"

Friday, 10/18/24
1:30-2:30 PM, 210 Mudd, APAM Conference Room
Li Wang, University of Minnesota
"Learning-enhanced structure preserving particle methods for nonlinear PDEs"

Tuesday, 10/22/24
2:45-3:45 PM, 214 Mudd
Gadi Fibich, Tel Aviv University
"Spreading Processes on Networks"

Wednesday, 10/30/24
11:00 AM-12:00 PM, 417 Mudd
Xiao-Chuan Cai, University of Macau and University of Colorado Boulder
"Parallel algorithms for modelling blood flows in the human cardiovascular system with clinical accuracy"

Monday, 11/4/24
Gang Bao, Zhejiang University
Some New Directions for Computational Inverse Problems 

Tuesday, 11/5/24
University holiday, no seminar

Tuesday, 11/12/24
2:45-3:45 PM, 214 Mudd
Reserved for Special SEAS Colloquium in Climate Science

Tuesday, 11/19/24
2:45-3:45 PM, 214 Mudd
Nat Trask, Univ of Penn
"Structure-preserving generative scientific machine learning with the finite element exterior calculus"

Tuesday, 11/26/24
2:45-3:45 PM, 214 Mudd
Di Qi, Purdue University
"Reduced-Order Moment Closure Models for Uncertainty Quantification and Data Assimilation"

Tuesday, 12/3/24
2:45-3:45 PM, 214 Mudd
Peng Chen, Georgia Tech
"Neural Surrogates for Fast and Scalable Bayesian Optimal Experimental Design"

Spring 2025

Tuesday, 1/28/25
2:45-3:45 PM, 214 Mudd
Special Applied Math Seminar

Wednesday, 1/29/25
4:00-5:00 PM, 214 Mudd
Special Applied Math Seminar

Friday, 1/31/25
1:00-2:00 PM, 214 Mudd
Special Applied Math Seminar

Monday, 2/3/25
1:00-2:00 PM, 210 Mudd
Special Applied Math Seminar

Tuesday, 2/4/25
2:45-3:45 PM, 214 Mudd
Solomon Quinn, Flatiron Institute
"Asymmetric transport in continuous topological insulators"

Monday, 3/10/25
4:00-5:00 PM, 214 Mudd
Thomas Chen, UT Austin
"Explicit construction of global minimizers and the interpretability problem in Deep Learning"

Tuesday, 3/11/25
2:45-3:45 PM, 214 Mudd
Donsub Rim, Washington University
"Low Rank Neural Representation of Hyperbolic Conservation Laws"

Tuesday, 3/25/25
2:45-3:45 PM, 214 Mudd
Antoine Levitt, Univ Paris, Orsay
"Numerical integration for periodic spectral problems"

Tuesday, 4/1/25
2:45-3:45 PM, 214 Mudd
Fioralba Cakoni, Rutgers
"The Control of Scattered Field for Linear and Nonlinear Scattering Media"

Tuesday, 4/8/25
2:45-3:45 PM, 214 Mudd
John Harlim, Penn State
 "Learning Vector Fields of Dynamical Systems"

Tuesday, 4/22/25
2:45-3:45 PM, 214 Mudd
Josselin Garnier, Ecole Polytechnique
"Wave propagation in random media in the branched flow regime"

Tuesday, 4/29/25
2:45-3:45 PM, 214 Mudd
Yoichiro Mori, UPenn
"Filaments and Open Membranes in Biofluid Mechanics"

Tuesday, 5/20/25
10:30-11:30 PM, 214 Mudd
Andrew Stuart, Caltech
"Learning Memory and Material Dependent Constitutive Laws"

9/19/23
Sam Stechmann, University of Wisconsin
"Element learning: a systematic approach of accelerating finite element-type methods via machine learning, with applications to radiative transfer"

9/26/23
Alberto Bressan, Penn State University
"Hyperbolic conservation laws: past and future"

10/3/23
Linda Cummings, New Jersey Institute of Technology 
"Dewetting and dielectrowetting in thin films of nematic liquid crystals"

10/10/23
Yiping Lu, Courant Institute
"Simulation-Calibrated Scientific Machine Learning" 

10/20/23
Friday, 11:00 AM, 210 Mudd (APAM Conference Room)
José A. Carrillo, Oxford University
"Aggregation-Diffusion Equations for Collective Behaviour in the Sciences"

10/23/23
Monday, 11:00 AM, 210 Mudd (APAM Conference Room)
Leonardo Zepeda-Núñez, Google
"Statistical Downscaling via Optimal Transport and Conditional Diffusion Models"

10/24/23
Ari Stern, WUSTL
"Structure-preserving hybrid finite element methods"

10/31/23
Jiequn Han, Flatiron Institute
"Enjoy the Best of Both Worlds: A Neural-Network Warm-Start Approach for PDE Problems"

11/14/23
Fadil Santosa, John Hopkins University
"Modeling Plasmons on Graphene with Time- and Space-Dependent Properties"

11/28/23
Russ Caflisch, Courant Institute
"Optimization of the Boltzmann Equation"

12/7/23
Thursday, 10:00 AM, 214 Mudd
Qin Li, University of Wisconsin-Madison
"Accelerating optimization over probability measure space"

1/23/24
Pierre Amenoagbadji, Columbia University
"Wave propagation in quasiperiodic media"

1/30/24
Yifan Chen, Courant Institute
"Fast, Multimodal, and Derivative-Free Bayes Inference with Fisher-Rao Gradient Flows"

2/20/24
Jinchao Xu, KAUST and Penn State Univ 
"Deep Learning and Scientific Computing"

3/19/24
Yoonsang Lee, Dartmouth University
"Solving PDEs and learning dynamical systems using neural networks"

3/26/24 
Andrew Stuart, Caltech
"Gradient Flows for Sampling: Mean-Field Models, Gaussian Approximations and Affine Invariance"

4/8/25
John Harlim, Penn State

4/9/24
Yimin Zhong, Auburn University
"How much can one learn a PDE from its solution?"

TBD - Fall 2024
Dmitry Batenkov, Tel- Aviv University

9/17/19: Henry Lam, IEOR/Columbia University
"Enhancing efficiency and flexibility of stochastic gradient estimation"

9/17/19: John Schotland, University of Michigan
"Quantum Optics in Random Media"

9/26/19: Jonathan Weare, Courant Institute (Joint seminar)
"Fast randomized iterative numerical linear algebra for quantum chemistry and other applications"

9/27/19: Chandrajit Bajaj, University of Texas at Austin
"Learning the Koopman operator for dynamic data"

10/1/19: Yue Yu, Lehigh University
“A Multiscale/Multiphysics Coupling Framework for Bioprosthetic Heart Valves (BHVs) Damage”

10/11/19: Gadi Fibich, Tel Aviv University
"Diffusion of new products in social networks"

10/22/19: Charlie Epstein, University of Pennsylvania / Flatiron Institute
“The Geometry of the Phase Retrieval Problem”

10/29/19: Rustum Choksi, McGill University
"Optimal Quantization: Gersho's Conjecture in 3D and Navigating the Energy Landscape"

11/12/19: Bo Li, UCSD
"Variational Implicit-Solvent Predictions of the Ligand-Receptor (Un)Binding Kinetics"

11/19/19: Miranda Holmes-Cerfon, NYU
"Rolling versus sliding: the relative dynamics of DNA-coated colloids"

12/3/19: Ralph Smith, North Carolina State University
"Active Subspace Techniques to Construct Surrogate Models for Complex Simulation Codes"

12/4/19: Thomas Yizhao Hou, Caltech
"Recent Progress on Singularity Formation of 3D Euler Equations and Related Models"

2/18/20: Stefan Steinerberger, Yale University
"Polynomials with many roots - the mean field limit of differentiation"

2/24/20: Lorenzo Tamellini, CNR-IMATI Pavia
"Sparse-grids-based Uncertainty Quantification of geochemical compaction of sedimentary basins"

2/25/20: Alejandro Aceves, Southern Methodist University
"Light filament science: Old perspectives and new paradigms"

3/3/20: Chi-Wang Shu, Brown University
"Stability of time discretizations for semi-discrete high order schemes for time-dependent PDEs"

3/10/20: Barak Sober, Duke University
"The Manifold Moving Least-Squares (Manifold-MLS) Framework: estimating manifolds and reconstructing their atlas from discrete data sets"

3/24/20: Victor Preciado, University of Pennsylvania
"Optimal Resource Allocation to Control Epidemic Outbreaks in Networked Populations"

10/1/18: Nick Trefethen, University of Oxford / NYU
"Numerical computation with rational and harmonic functions"

10/2/18: Haizhao Yang National University of Singapore
"O(N log N) algorithms for matrix multiplications from highly oscillatory phenomena"

10/9/18: Xu Yang, University of California, Santa Barbara
"Frozen Gaussian approximation for 3-D elastic wave propagation and seismic tomography"

10/11/18: Weizhu Bao, National University of Singapore
"Multiscale methods and analysis for the Dirac equation in the nonrelativistic limit regime"

10/23/18: Nawaf Bou-Rabee, Rutgers University, Camden
"Sticky Diffusions & their Numerical Solution"

10/30/18: Pavel M. Lushnikov, University of New Mexico
"Nonlinear waves and singularities in nonlinear optics, plasmas, hydrodynamics and biology"

11/13/18: Anne Gelb, Dartmouth College
"High order imaging techniques for synthetic aperture radar"

11/27/18: Benjamin Peherstorfer, Courant Institute, NYU
"Model reduction for transport-dominated problems via adaptive basis updates"

12/4/18: Keaton Burns, Flatiron Institute "Flexible algorithms for solving PDEs with spectral methods"

2/12/19: Kyle Thicke, Duke University
"Electronic structure algorithms for computing edge states and accelerating DFT calculations"

2/19/19: Weiqi Chu, Penn State University
"First-Principal based model reduction method with applications in molecular dynamics"

2/21/19: Kevin DallaSanta, Courant Institute, NYU
"The circulation response to volcanic eruptions: investigating with a hierarchy of models"

2/26/19: Maurice Fabien, Rice University
"A discontinuous Galerkin method for flow and transport in porous media"

3/5/19: Liliana Borcea, University of Michigan
"Reduced order model approach for inverse scattering"

3/12/19: Richard Mikael Slevinsky, University of Manitoba
"FastTransforms and A Nonlocal Vector Calculus on the Sphere"

4/16/19: Max Gunzburger, Florida State University
"Quo vadis UQ?"