Seminars

Joint APPM/MATH Colloquium - Catherine Sulem

Sept. 24, 2019

Catherine Sulem Department of Mathematics, University of Toronto Bloch theory and spectral gaps for linearized water waves We consider the movement of a free surface of a two-dimensional fluid over a variable bottom. We assume that the bottom has a periodic prole and we study the water wave system linearized...

Applied Math Colloquium - John Harlim

Sept. 20, 2019

John Harlim Departments of Mathematics and Meteorology, Penn State University Manifold learning based computational methods Recent success of machine learning has drawn tremendous interests in applied mathematics and scientific computations. In this talk, I will discuss recent efforts in using manifold learning algorithms (a branch of machine learning) to do...

Applied Mathematics Colloquium - Matthew Norman

Sept. 17, 2019

Matthew Norman, Oak Ridge National Laboratory Fluids algorithms from a High Performance Computing Perspective Numerical approximations to Partial Differential Equations have provided diverse benefits to society over the years. Their applications in simulation codes have weathered a number of large changes in computing as well, from the original vector machines...

Applied Math Colloquium - Jennifer Ryan

Sept. 13, 2019

Jennifer Ryan Department of Applied Mathematics and Statistics, Colorado School of Mines Superconvergence Extraction: How to do it? When is it applicable? Many numerical simulations produce data that contains hidden information. This hidden information can be exploited to create even more accurate representations of the data by appropriately constructing convolution...

Applied Math Colloquium - Henry Adams

Sept. 6, 2019

Henry Adams Department of Mathematics, Colorado State University An introduction to applied topology This talk is an introduction to computational topology, as applied to data analysis and to sensor networks. The shape of a dataset often reflects important patterns within. Two such datasets with interesting shapes are a space of...

Applied Math Colloquium - Adrianna Gillman

Aug. 30, 2019

Adrianna Gillman Department of Applied Mathematics, University of Colorado Boulder An efficient and high order accurate direct solution technique for variable coefficient elliptic partial differential equations For many applications in science and engineering, the ability to efficiently and accurately approximate solutions to elliptic PDEs dictates what physical phenomena can be...

Department Colloquium - Marcel Nutz

April 26, 2019

Convergence to the Mean Field Game Limit: A Case Study Mean field games are used as approximations to n-player games with large n. Indeed, n-player Nash equilibria are known to converge to their mean field counterpart when the latter is unique. In this talk we study a specific stochastic game...

Department Colloquium - Yu Du and Fred Glover

April 19, 2019

QUBO Models in Optimization, Machine Learning, and Quantum Computing The Quadratic Unconstrained Binary Optimization (QUBO) model has gained prominence in recent years with the discovery that it unifies a rich variety of combinatorial optimization problems. By its association with the Ising problem in physics, the QUBO model has emerged as...

Department Colloquium - Jianfeng Zhang

April 12, 2019

Set Values for Nonzero Sum Games With Multiple Equilibriums Nonzero sum games typically have multiple Nash equilibriums (or no equilibriums), and unlike zero sum games, they may have different values at different equilibriums. While most works in the literature focus on the existence of individual equilibriums, we propose instead to...

Department Colloquium - Francesco Sorrentino

April 5, 2019

Cluster Synchronization in Networks with Symmetries We first review the master stability function (MSF) approach to synchronization of networks of coupled identical oscillators. The original formulation proposed by Pecora and Carroll applies to the case that all the oscillators in the network converge on the same time-evolution (complete synchronization) and...

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