Numerical Analysis and Scientific Computing Seminar
The Numerical Analysis and Scientific Computing seminar will resume online in Fall 2020, meeting at the usual time of Fridays at 10am unless otherwise noted. The Zoom link to join the seminar will be sent to the seminar mailing list. Contact the organizers if you haven't received the Zoom link.
To subscribe to the seminar mailing list, please see here.
Seminar Organizer(s): Benjamin Peherstorfer and Georg Stadler
Upcoming Events for Fall 2020

SEP 2510AM, Warren Weaver Hall (online)
Efficient Probabilistic Tsunami Hazard Assessment using Clustering and Multiresolution Modeling
Randall J LeVeque, Applied Mathematics, University of Washington 
OCT 210AM, Warren Weaver Hall (online)
tbd
Daniel Kressner, Swiss Federal Institute of Technology in Lausanne (EPFL) 
OCT 1610AM, Warren Weaver Hall (online)
Uniform Error Estimates for the Lanczos Method
John Urschel, Massachusetts Institute of Technology 
OCT 2310AM, Warren Weaver Hall (online)
tbd
Philipp Petersen, University of Vienna 
OCT 3010AM, Warren Weaver Hall (online)
tbd
Anne Gelb, Dartmouth College 
NOV 610AM, Warren Weaver Hall (online)
tbd
Tim Warburton, Virginia Polytechnic Institute and State University 
NOV 1310AM, Warren Weaver Hall (online
tbd
Amneet Bhalla, San Diego State University 
NOV 2010AM, Warren Weaver Hall (online)
tbd
George Biros, Oden Institute for Computational Engineering and Sciences, The University of Texas at Austin 
DEC 410AM, Warren Weaver Hall (online)
tbd
Karen VeroyGrepl, Eindhoven University of Technology 
DEC 1110AM, Warren Weaver Hall (online)
tbd
Wayne Isaac Uy, Courant Institute of Mathematical Sciences, New York University
Past Events

SEP 1810AM, Warren Weaver Hall (online)
Multigrid Methods for Computing LowRank Solutions to ParameterDependent Partial Differential Equations
Howard Elman, University of Maryland 
MAR 610AM, Warren Weaver Hall 1302
An upwind hybridized discontinuous Galerkin methods: theory and application to atmospheric flows and magnetohydrodynamics
Tan Bui, University of Texas, Austin 
FEB 2810AM, Warren Weaver Hall 1302
Direct solution of systems with rankstructured matrices
Daria Sushnikova, CIMS 
FEB 2110AM, Warren Weaver Hall 1302
Approximating lowrank eigenpairs of matrixvalued linear operators
Nicola Guglielmi, Gran Sasso Science Institute, Italy 
FEB 1410AM, Warren Weaver Hall 1302
Computation of regularity, stability and passivity distances for dynamical systems with portHamiltonian structure
Volker Mehrmann, TUBerlin 
FEB 710AM, Warren Weaver Hall 1302
Stochastic Gradient Descent: General Analysis and Improved Rates
Robert Gower, Facebook 
2019

DEC 1310AM, Warren Weaver Hall 1302
Computing the Kreiss Constant of a Matrix
Tim Mitchell, Max Planck Institute, Magdeburg 
DEC 610AM, Warren Weaver Hall 1302
Contour Integral Methods for Nonlinear Eigenvalue Problems: A System Theoretic Approach
Mark Embree, Virginia Tech 
NOV 2910AM, Location TBA
THANKSGIVING BREAK

NOV 2210AM, Warren Weaver Hall 1302
RandomthenGreedy Procedure: From Empirical Risk Minimization to Gradient Boosting Machine
Haihao (Sean) Li, Google Research and University of Chicago 
NOV 1510AM, Location TBA
No seminar

NOV 810AM, Warren Weaver Hall 1302
Reynoldsrobust preconditioning for the incompressible NavierStokes equations
Florian Wechsung, Courant Institute 
NOV 110AM, Warren Weaver Hall 1302
LimitedMemory BFGS with Displacement Aggregation
Albert Berahas, Lehigh 
OCT 2510AM, Warren Weaver Hall 1302
Directional H2matrices for Helmholtz problems with complex frequencies
Maria Lopez Fernandez, Sapienza University, Rome 
OCT 1810AM, Warren Weaver Hall 1302
Machine Learning in adaptive domain decomposition methods  predicting the geometric location of constraints
Axel Klawonn, Cologne 
OCT 1110AM, Warren Weaver Hall 1302
Controltheoretic models of environmental crime
Alexander B. Vladimirsky, Cornell 
SEP 2710AM, Warren Weaver Hall 1302
A new framework for solving Lyapunov (and other matrix) equations
Heike Fassbender, TU Braunschweig 
SEP 2010AM, Warren Weaver Hall 1302
Datadriven modeling for dynamical systems
Serkan Gugercin, Virginia Tech 
SEP 1310AM, Warren Weaver Hall 1302
Minimal realization and model reduction of structured systems
Peter Benner, Max Planck Institute, Magdeburg 
MAY 310AM, Warren Weaver Hall 1302
The generalized null space decomposition and its implications for computing the Jordan form
Michael Overton, NYU Courant 
APR 2610AM, Warren Weaver Hall 1302
Model uncertainty issues in nonlinear inverse problems
Kui Ren, Columbia 
APR 1910AM, Warren Weaver Hall 1302
Optimization of PhaseField Damage Evolution
Winni Wollner, Darmstadt 
APR 1210AM, Warren Weaver Hall 1302
Four “better” ways to solve the NavierStokes equations: simulation of Richardson pair dispersion, ensemble discretization methods, an auxiliary equation approach for UQ, and filtered regularizations
Max Gunzburger, Florida State 
MAR 2910AM, Warren Weaver Hall 1302
Scalable Optimization Algorithms for Largescale Subspace Clustering
Daniel Robinson, Johns Hopkins University 
MAR 1510AM, Warren Weaver Hall 1302
Fractional PDEs: Optimal Control and Applications
Harbir Antil, George Mason University 
FEB 2210AM, Warren Weaver Hall 1302
Reduced Order Methods for PDEs: state of the art and perspectives with applications in Industry, Medicine and Environmental Sciences
Gianluigi Rozza, SISSA 
FEB 1510AM, Warren Weaver Hall 1302
Dimensionality Reduction of Nonlinear Waves Using Transport and Radon Transform
Donsub Rim, Columbia University 
FEB 810AM, Warren Weaver Hall 1302
DimensionRobust MCMC Methods for Bayesian Inversion
Matt Dunlop, CIMS 
FEB 110AM, Warren Weaver Hall 1302
PrimalDual Interior Methods for Nonlinear Optimization
Philip Gill, UCSD 
2018

DEC 1410AM, Warren Weaver Hall 1302
An L1 Augmented Lagrangian Algorithm and Why, at Least Sometimes, it is a Very Good Idea
Andrew Conn, IBM Watson Research Center 
DEC 710AM, Warren Weaver Hall 1302
Fast, HighFidelity Methods for Simulation of Particulate Flows
Shravan Veerapaneni, University of Michigan 
NOV 3010AM, Warren Weaver Hall 1302
Numerical Solution of TwoPhase Flow in Porous Media at the Pore Scale
Beatrice Riviere, Rice University 
NOV 910AM, Warren Weaver Hall 1302
Optimal Transport for Seismic Inversion: Tackling the Nonlinearity
Yunan Yang, Courant 
NOV 210AM, Warren Weaver Hall 1302
High Order Accurate Compact Finite Difference Scheme for Wave Equation in General Shaped Domains using Simple Meshes
Eli Turkel, Tel Aviv University 
OCT 2610AM, Warren Weaver Hall 1302
Dynamic Coupling of Full and Reduced Models via Randomized Online Basis Updates
Benjamin Peherstorfer, Courant 
OCT 1910AM, Warren Weaver Hall 1302
Moment Limiters for the Discontinuous Galerkin Method on Unstructured Meshes
Andrew Giuliani, Courant 
OCT 510AM, Warren Weaver Hall 1302
SurveillanceEvasion Games Under Uncertainty
Alexander Vladimirsky, Cornell 
SEP 2810AM, Warren Weaver Hall 1302
Numerical Computation with Rational and Harmonic Functions
Nick Trefethen, Oxford and NYU Courant 
SEP 2110AM, Warren Weaver Hall 1302
Interpolatory Methods for Robust Control of Dynamical Systems
Matthias Voigt, TU Berlin 
MAY 410AM, Warren Weaver Hall 1302
How to Characterize the WorstCase Performance of Algorithms for Nonconvex Optimization
Frank E. Curtis, Lehigh University 
APR 2710AM, Warren Weaver Hall 1302
An accurate and fast solver for highfrequency wave propagation
Matthias Taus, MIT 
APR 2010AM, Warren Weaver Hall 1302
Nonholonomic stability and rotation with zero angular momentum: Demonstrations of driving stability and of the falling cat phenomenon go sour
Andy Ruina, Cornell 
APR 1310AM, Warren Weaver Hall 1302
Polynomial approximations of the region of attraction of a polynomial control system
Didier Henrion, Toulouse 
APR 610AM, Warren Weaver Hall 1302
Continuous analogues of Krylov methods for differential operators
Alex Townsend, Cornell 
MAR 3010AM, Warren Weaver Hall 1302
On the Evaluation of Sums of Periodic Gaussians
Andrei Osipov, Shaw Research 
MAR 2310AM, Warren Weaver Hall 1302
A fast direct solution technique for boundary value problems on locally perturbed geometries
Adrianna Gillman, Rice University 
MAR 910AM, Warren Weaver Hall 1302
Optimal model reduction: An interpolatory framework
Serkan Gugercin, Virginia Tech 
MAR 210AM, Warren Weaver Hall 1302
Pattern Formation on the Sphere
Hadrien Montanelli, Columbia 
FEB 2310AM, Warren Weaver Hall 1302
Graph Partitioning using Matrix Differential Equations
Nicola Guglielmi, Gran Sasso Science Institute, Italy 
FEB 1610AM, Warren Weaver Hall 1302
The Summationby Parts Property: Provably Stable Discretizations of Hyperbolic Partial Differential Equations
David Zingg, University of Toronto 
FEB 910AM, Warren Weaver Hall 1302
Support Function Based Optimization of Eigenvalues
Emre Mengi, Koç University, Turkey 
FEB 211AM, 60 Fifth Avenue 150
Special CS Colloquium: DataDriven Multifidelity Methods for Monte Carlo Estimation
Benjamin Peherstorfer, University of WisconsinMadison 
JAN 2610AM, Warren Weaver Hall 1302
FabricationAware Geometry Processing
Daniele Panozzo, Courant 
2017

DEC 1510AM, Warren Weaver Hall 1302
A Hybridizable Discontinuous Galerkin solver for axisymmetric plasma equilibrium
Tonatiuh SanchezVizuet, Courant 
DEC 810AM, Warren Weaver Hall 1302
High Performance Sparse Linear Algebra
Erin Carson, Courant 
DEC 110AM, Warren Weaver Hall 1302
Parallelizable Approach for Optimization Problems with Orthogonality Constraints
Xin Liu, Chinese Academy of Sciences 
NOV 2410AM, Warren Weaver Hall 1302
Thanksgiving
No seminar 
NOV 1710AM, Warren Weaver Hall 1302
Scalable Integral Equation Methods for Elliptic Boundary Value Problems
Dhairya Malhotra, CIMS 
NOV 1010AM, Warren Weaver Hall 1302
An Optimal Control Framework for Efficient Training of Deep Neural Networks
Lars Ruthotto, Emory University 
NOV 310AM, Warren Weaver Hall 1302
Accelerated conditional gradient methods for continuous sparse optimization problems
Konstantin Pieper, Florida State University 
OCT 2710AM, Warren Weaver Hall 1302
Convexification Techniques for Global Optimization of MixedInteger Nonlinear Optimization Problems
Aida Khajavirad 
OCT 2010AM, Warren Weaver Hall 1302
Courant Instructor Day
No seminar 
OCT 1310AM, Warren Weaver Hall 1302
Isogeometric Analysis and Domain Decomposition
Olof Widlund, Courant 
OCT 610AM, Warren Weaver Hall 1302
Untangling the nonlinearity in inverse scattering using datadriven reduced order models
Liliana Borcea, University of Michigan 
SEP 2910AM, Warren Weaver Hall 1302
On the solution of elliptic partial differential equations on regions with corners
Kirill Serkh, Courant 
SEP 2210AM, Warren Weaver Hall 1302
Pursuing Rapid Convergence for Gradient Samplinglike Methods for Nonsmooth Optimization
Lucas Simões, University of Campinas, Brazil 
SEP 1510AM, Warren Weaver Hall 1302
Lowrank methods for PDEconstrained optimization under uncertainty
Peter Benner, Max Planck Institute, Magdeburg 
SEP 810AM, Warren Weaver Hall 1302
Some new vector spaces of possible linearizations for matrix polynomials
Heike Fassbender, University of Braunschweig 
MAY 1210AM, Warren Weaver Hall 1302
Numerical Aspects of Flow Stabilization by Riccati Feedback
Heiko Weichelt, The Mathworks, UK 
MAY 510AM, Warren Weaver Hall 1302
Fast Algorithms for Robust Stability Measures
Tim Mitchell, Max Planck Institute, Magdeburg 
APR 2810AM, Warren Weaver Hall 1302
A Space Decomposition Framework for Nonlinear Optimization
Luis Nunes Vicente, University of Coimbra & Rice University 
APR 2110AM, Warren Weaver Hall 1302
Should you derive, or let the data drive? A stochastic optimization approach for model misspecification mitigation
Lior Horesh, IBM TJ Watson 
APR 1410AM, Warren Weaver Hall 1302
Approximate Versions of the Alternating Direction Method of Multipliers (ADMM)
Jonathan Eckstein, Rutgers 
APR 710AM, Warren Weaver Hall 1302
Sketchy Decisions: Convex LowRank Matrix Optimization with Optimal Storage
Madeleine Udell, Cornell 
MAR 3110AM, Warren Weaver Hall 1302
Variable Coefficients and Numerical Methods for Electromagnetic Waves
LiseMarie ImbertGerard, CIMS 
MAR 2410AM, Warren Weaver Hall 1302
Anderson Acceleration: Convergence Theory and Numerical Experience
Tim Kelley, NCSU 
MAR 1010AM, Warren Weaver Hall 1302
Clustered Particle Filtering for High Dimensional NonGaussian Systems
Yoonsang Lee, CIMS 
MAR 310AM, Warren Weaver Hall 1302
Anisotropic Multiscale Systems on Bounded Domains
Gitta Kutyniok, TUBerlin 
FEB 242:30PM, Warren Weaver Hall 109
**Special Time** Domain Decomposition: From Poisson to Coupled Multiphysics Problems
XiaoChuan Cai, University of Colorado at Boulder 
FEB 1710AM, Warren Weaver Hall 1302
Simulating semiflexible fiber suspensions in Stokes flow applied to cell mechanics
Ehssan Nazockdast, Simons 
FEB 1010AM, Warren Weaver Hall 1302
Computational Methods for Storm Surge Modeling
Kyle Mandli, Columbia 
FEB 310AM, Warren Weaver Hall 1302
Incremental methods for additive convex cost optimization
Mert Gurbuzbalaban, Rutgers 
JAN 2710AM, Warren Weaver Hall 1302
Solving Conic Optimization Problems with MOSEK
Erling Andersen, MOSEK 
2016

DEC 910AM, Warren Weaver Hall 1302
Optimization methods for optimal transport in imaging
Dirk Lorenz, TUBraunschweig 
DEC 211:30AM, Warren Weaver Hall 1302
Model reduction for edgeweighted personalized PageRank
David Bindel, Cornell University 
NOV 1810AM, Warren Weaver Hall 1302
Fast convolution with freespace Green’s functions
Felipe Vico, Universidad Politecnica de Valencia 
NOV 1110AM, Warren Weaver Hall 1302
Data assimilation by the Ensemble Kalman filter and other particle filters — why are 50 ensemble members enough?
Matti Morzfeld, University of Arizona at Tucson 
NOV 410AM, Warren Weaver Hall 1302
A fluctuating boundary integral method for Brownian suspensions
Aleks Donev, CIMS 
OCT 2810AM, Warren Weaver Hall 1302
From Dominant Eigenspace Computation to Orthogonal Constrained Optimization Problems
Xin Liu, Chinese Academy of Sciences and CIMS 
OCT 710AM, Warren Weaver Hall 1302
Cubature, approximation, and isotropy in the hypercube
Nick Trefethen, University of Oxford and CIMS 
SEP 2310AM, Warren Weaver Hall 1302
Meshfree finite difference methods for fully nonlinear elliptic equations
Brittany Froese, NJIT 
SEP 1610AM, Warren Weaver Hall 1302
Fast Approximation of the Stability Radius and the Hinfinity Norm for LargeScale Linear Dynamical Systems with Output Feedback
Michael Overton, CIMS 
SEP 910AM, Warren Weaver Hall 1302
On the Linear Convergence of the FrankWolfe Algorithm
Javier Pena, Carnegie Mellon University 
MAY 2010AM, Warren Weaver Hall 1302
Randomized Algorithms for Matrix Decomposition
Yariv Aizenbud, Tel Aviv University 
MAY 1310AM, Location TBA
No Seminar

MAY 610AM, Warren Weaver Hall 1302
Finite Elements Methods on NonAligned Meshes for High Contrast Interface Problems
Marcus Sarkis, Worcester Polytechnic Institute 
APR 2910AM, Warren Weaver Hall 1302
A Sparse Linear Programming method for Optimal Transportation
Adam Oberman, McGill University 
APR 2210AM, Warren Weaver Hall 1302
Challenges in Multivalued Matrix Functions
Nick Higham, University of Manchester 
APR 1510AM, Warren Weaver Hall 1302
Level Set Methods in Convex Optimization
James Burke, University of Washington 
APR 810AM, Location TBA
**CANCELLED** Incremental Methods for Additive Convex Cost Optimization
Mert Gurbuzbalaban, MIT 
APR 110AM, Warren Weaver Hall 1302
Communication Lower Bounds for Loop Nests
Nicholas Knight, CIMS 
MAR 2510AM, Warren Weaver Hall 1302
Complexity Analysis of Root Clustering for a Complex Polynomial
Chee Yap, CIMS 
MAR 1110AM, Warren Weaver Hall 1302
A Novel SkewSymmetric Discontinuous Galerkin based Approach for Nonlinear Conservation Laws: High Resolution, High Performance Computing and Robustness
Gregor Gassner, University of Cologne 
MAR 410AM, Warren Weaver Hall 1302
Inverse medium scattering with multiple frequency data and multiple angles of incidence
Carlos Borges, CIMS 
FEB 2610AM, Warren Weaver Hall 1302
A generic acceleration scheme for largescale gradientbased optimization
Zaid Harchaoui, CIMS 
FEB 1910AM, Warren Weaver Hall 1302
3D Eddycurrent tomography of deposits in steam generators
Kamel Riahi, NJIT 
FEB 510AM, Warren Weaver Hall 1302
Eigenvalue Attraction
Ramis Movassagh, IBM Yorktown Heights 
2015

DEC 152PM, Warren Weaver Hall 101
(CS Colloquium, Tuesday) Nonsmooth Optimization via Piecewise Differentiation
Andreas Griewank, Yachay Tech, Ecuador and Humboldt University, Berlin 
DEC 1110AM, Warren Weaver Hall 1302
Transport of probability measures in high dimensions with applications to Bayesian inference
Alessio Spantini, MIT 
DEC 73:45PM, Warren Weaver Hall 1302
(Joint CS and Math Colloquium, Monday) Coordinate Descent Algorithms
Stephen J. Wright 
DEC 410AM, Warren Weaver Hall 1302
Parallel Computing and Numerical Optimization
Jonathan Eckstein, Rutgers 
NOV 2710AM, Warren Weaver Hall 1302
Thanksgiving
No seminar 
NOV 2010AM, Warren Weaver Hall 1302
On Nonsingular SaddlePoint Systems with a Maximally RankDeficient Leading Block
Chen Greif, UBC 
NOV 1310AM, Warren Weaver Hall 1302
Balancing Domain Decomposition by Constraints methods: stateoftheart, current implementation in PETSc and future perspectives.
Stefano Zampini, KAUST 
NOV 610AM, Warren Weaver Hall 1302
CoreChasing Algorithms for Eigenvalue Computation
David Watkins, Washington State University 
OCT 3010AM, Warren Weaver Hall 1302
Predicting Extreme Events in Fluid Turbulence with the Instanton Formalism: Numerical Computation of Large Deviation Minimizers
Tobias Grafke, CIMS 
OCT 2310AM, Warren Weaver Hall 1302
Merits and Pitfalls of Splitting Methods
Alexander Ostermann, University of Innsbruck 
OCT 1610AM, Warren Weaver Hall 1302
Avoiding Communication in Krylov Subspace Methods
Erin Carson, CIMS 
OCT 910AM, Warren Weaver Hall 1302
Fast Steerable Principal Component Analysis and Its Applications
Jane Zhao 
OCT 210AM, Warren Weaver Hall 1302
Courant Instructor Day
No seminar 
SEP 2510AM, Warren Weaver Hall 1302
No seminar
No seminar 
SEP 1810AM, Warren Weaver Hall 1302
EulerMaclaurin, Gregory, and Other Equally Spaced Interpolants
Nick Trefethen, Oxford and CIMS 
MAY 810AM, Warren Weaver Hall 1302
Extremescale nonlinear Stokes solvers, with application to flow simulations in Earth's mantle
Georg Stadler, CIMS 
APR 1710AM, Warren Weaver Hall 1302
Variable coefficient and volume integral for Helmholtz equation
LiseMarie ImbertGerard, CIMS 
APR 310AM, Warren Weaver Hall 1302
Numerical Modeling of Vesicle Electrohydrodynamics in Three Dimensions
Ebrahim M. Kolahdouz, SUNY Buffalo 
MAR 274PM, Warren Weaver Hall 102
Fast algorithms based on asymptotic expansions of special functions
Dr. Alex Townsend, MIT 
MAR 2710AM, Warren Weaver Hall 1302
On the evaluation of prolate spheroidal wave functions and associated quadrature rules
Andrei Osipov, Yale 
MAR 2010AM, Warren Weaver Hall 1302
Spring break 
MAR 610AM, Warren Weaver Hall 1302
Finite Element Exterior Calculus and Applications.
Richard Falk, RutgersNew Brunswick 
FEB 2010AM, Warren Weaver Hall 1302
Universality in numerical computations with random data
Thomas Trogdon, CIMS 
2014

DEC 510AM, Warren Weaver Hall 1302
An immersedboundary method for suspensions of rigid bodies
Aleksandar Donev, Courant Institue 
NOV 2110AM, Warren Weaver Hall 1302
Time Reversal for the Inverse problem of locating sources and obstacles
Eli Turkel, Tel Aviv University 
NOV 1410AM, Warren Weaver Hall 1302
Multigrid Methods for Saddle Point Problems.
DukSoon Oh, Rutgers 
NOV 710AM, Warren Weaver Hall 1302
Scalable finite element viscous flow solvers on octree meshes, with application to ice sheet dynamics
Tobin Isaac, University of Texas at Austin 
OCT 3110AM, Warren Weaver Hall 1302
Upwind methods for second order wave equations.
Thomas Hagstrom, Southern Methodist University 
OCT 1710AM, Warren Weaver Hall 1302
BDDC deluxe domain decomposition algorithms
Olof Widlund, Courant Institute 
OCT 1010AM, Warren Weaver Hall 1302
A class of Laplacian multiwavelets bases for highdimensional data
Nir Sharon, Tel Aviv 
OCT 310AM, Warren Weaver Hall 1302
Courant Instructor Day
No seminar 
SEP 2610AM, Warren Weaver Hall 1302
Asymptotically compatible discretization of parametrized variational problems with applications to nonlocal models
Qiang Du, Columbia University 
SEP 1910AM, Warren Weaver Hall 1302
A levelset based mesh evolution method for shape optimization
Charles Dapogny, Rutgers, New Brunswick 
SEP 1210AM, Warren Weaver Hall 1302
Probabilistic Tsunami Hazard Assessment
Randall J LeVeque, University of Washington 
MAY 1512PM, Warren Weaver Hall 1302
** THURSDAY talk at 12:00pm ** Computational Problems in Tensors
Shmuel Friedland, University of Illinois, Chicago 
MAY 210AM, Warren Weaver Hall 1302
Multilevel Iterative Methods and Temporal Parallelism
Mike Minion, Stanford University 
APR 2511AM, Warren Weaver Hall 1302
Calculating Electrical and Thermal Conductivities in a Hydrogen Plasma with Classical and Quantum Molecular Dynamics
Christian Scullard, Lawrence Livermore National Laboratory 
APR 1810AM, Warren Weaver Hall 1302
Finitedifference Gaussian Rules for DirichlettoNeumann Operators, Perfectly Matched Layers and Inverse Problems
Vladimir Druskin, Schlumberger Doll Research 
APR 1110AM, Warren Weaver Hall 1302
Extended Sparsification and Hierarchical Compression Based Fast Direct Solvers
Sivaram Ambikasaran, CIMS 
APR 410AM, Warren Weaver Hall 1302
Multiple Eigenvalues in Stability Analysis
Oleg Kirillov, HelmholtzZentrum DresdenRossendorf 
MAR 2810AM, Warren Weaver Hall 1302
Increased Accuracy of Immersed Boundary Methods Using Fourier Approximations of Delta Functions
Robert Guy, University of California, Davis 
MAR 710AM, Warren Weaver Hall 1302
Spectrally Accurate Direct Solution of Variablemedia Scattering Problems Via Impedance Maps
Alex Barnett, Dartmouth College 
FEB 2810AM, Warren Weaver Hall 1302
Graph Expansion and Communication Complexity of Algorithms
Olga Holtz, UC Berkeley, TUBerlin and IAS 
FEB 2110AM, Warren Weaver Hall 1302
Efficient Simulation of Gas Flow in a Pipe Network (Techniques and Theory in Model Order Reduction)
Sara Grundel, Max Planck Institute 
FEB 711:30AM, Warren Weaver Hall 1302
**CS Colloquium at 11:30am**
Doug James, Cornell University 
2013

DEC 1310AM, Warren Weaver Hall 1302
Recent Progress on the Search of 3D Euler Singularities
Thomas Hou, California Institute of Technology 
DEC 610AM, Warren Weaver Hall 1302
A Multifrequency Method for the Shape Reconstruction of 2D Scatterers
Carlos Borges, CIMS 
NOV 2910AM, Warren Weaver Hall 1302
No speaker Nov 29
No speaker Nov 29 
NOV 2210AM, Warren Weaver Hall 1302
Crouzeix's Conjecture
Anne Greenbaum, University of Washington 
NOV 1510AM, Warren Weaver Hall 1302
Discontinuous Galerkin with Peacewise Constant Fluxes for Diffusion Equations
Yuri Kuznetsov, University of Houston 
NOV 810AM, Warren Weaver Hall 1302
Nonsymmetric Preconditioning for Symmetric Linear Equations and Eigenvalue Problems
Andrew Knyazev, Mitsubishi Electric Research Laboratories 
OCT 2510AM, Warren Weaver Hall 1302
Nonsmooth Slope, Alternating Projections, and Trajectories of Steepest Descent
Adrian Lewis, School of ORIE, Cornell University 
OCT 1810AM, Warren Weaver Hall 1302
Seminar Cancelled
Seminar Cancelled 
OCT 1110AM, Warren Weaver Hall 1302
A Staggered Discontinuous Galerkin Method for the Stokes System and its Fast Solvers by Domain Decomposition Methods
Hyea Hyun Kim, Kyung Hee University, Korea 
OCT 410AM, Warren Weaver Hall 1302
Continuous Analogues of Matrix Factorizations
Alex Townsend, University of Oxford 
SEP 2710AM, Warren Weaver Hall 1302
Francis's Algorithm
David Watkins, Washington State University 
SEP 2010AM, Warren Weaver Hall 1302
Algorithms Based on Analytic Function Values at Roots of Unity
Nick Trefethen, Oxford University and CIMS 
SEP 1310AM, Warren Weaver Hall 1302
A Nasty Cone with Nice Properties  New Issues in Copositive Optimization
Immanuel Bomze, University of Vienna 
APR 2611:30AM, Warren Weaver Hall 1302
**held at 11:30am** SystemTheoretic Model Reduction for Nonlinear Systems
Peter Benner, Max Planck Institute, Magdeburg 
APR 1910AM, Warren Weaver Hall 1302
Timestepping Schemes for Nonsmooth Rigid Multibody Dynamics
Florian Potra, University of Maryland, Baltimore County 
APR 1210AM, Warren Weaver Hall 1302
Nonreflecting Boundaries for Water Wave Problems
Smadar Karni, University of Michigan 
MAR 2910AM, Warren Weaver Hall 1302
Quadrature by Expansion: A New Method for the Evaluation of Layer Potentials
Andreas Kloeckner, CIMS 
MAR 2210AM, Warren Weaver Hall 1302
No Speaker March 22
No Seminar March 22 
MAR 1510AM, Warren Weaver Hall 1302
Robust Methods for LargeScale Inverse Problems
Aleksandr Aravkin, IBM Watson Research Center 
MAR 810AM, Warren Weaver Hall 1302
The Interplay of Convexity and Algorithmic Algebra in Optimization and Systems Analysis
Amir Ali Ahmadi, IBM Watson Research Center 
MAR 110AM, Warren Weaver Hall 1302
No Seminar March 1
No Seminar March 1 
FEB 2210AM, Warren Weaver Hall 1302
Linear Rational Interpolation Done Unwisely (But Efficiently)
Stefan Guettel, The University of Manchester 
FEB 1510AM, Warren Weaver Hall 1302
Accurate and Efficient Numerical Methods for Highfrequency 3D Wave Scattering and Periodic Geometries
Alexander Barnett, Dartmouth College 
FEB 810AM, Warren Weaver Hall 1302
Stable and Accurate Integral Equation Methods for Elliptic Problems with Multiple Material Interfaces in Two Dimensions
Leslie Greengard, CIMS 
FEB 110AM, Warren Weaver Hall 1302
Jet Schemes and GradientAugmented Level Set Methods
Benjamin Seibold, Temple University 
2012

DEC 103:45PM, Warren Weaver Hall 1302
Gaussian Elimination As An Iterative Algorithm **Math Colloquium Mon at 3:45pm**
Nick Trefethen, Oxford University 
DEC 711:30AM, Warren Weaver Hall 1302
A Simple, Combinatorial Algorithm for Solving Laplacian Systems in NearlyLinear Time Without Recursive Preconditioning **CS Colloquium at 11:30am**
Jonathan Kelner, MIT 
NOV 3010AM, Warren Weaver Hall 1302
A Composite Spectral Method for Variable Coefficient Elliptic PDEs with its Own Fast Direct Solver
Adrianna Gillman, Dartmouth College 
NOV 2310AM, Warren Weaver Hall 1302
No Speaker Nov 23
No Seminar Nov 23 
NOV 169AM, Warren Weaver Hall 1302
The Search for an Efficient and Robust Solver for Largescale Nonlinear Optimization
Daniel Robinson, Johns Hopkins University 
NOV 911:30AM, Warren Weaver Hall 1302
CommunicationAvoiding Algorithms for Linear Algebra and Beyond **CS colloquium at 11:30am**
James Demmel, University of California at Berkeley 
OCT 2610AM, Warren Weaver Hall 1302
A Randomized Approximate Nearest Neighbors Algorithm
Andrei Osipov, Yale University 
OCT 1910AM, Warren Weaver Hall 1302
A Convex Perspective on Spectral Methods in Signal Processing.
Ben Recht, University of Wisconsin  Madison 
OCT 1210AM, Warren Weaver Hall 1302
Optimization on Riemannian Manifolds for Solving Rankstructured Matrix and Tensor Problems
Bart Vandereycken, Princeton University 
SEP 2810AM, Warren Weaver Hall 1302
Lagrange Newton Interpolation, Divided Differences, Splines and Sobolev Spaces
Bogdan Bojarski, Polish Academy of Sciences 
APR 2710AM, Warren Weaver Hall 1302
Evaluating Discontinuous Galerkin Methods on Manycore Architectures
Tim Warburton, Rice University 
APR 2010AM, Warren Weaver Hall 1302
A Highorder Constrained Transport Method for the 3d Magnetohydrodynamic Equations
Christiane Helzel 
APR 1310AM, Warren Weaver Hall 1302
Superconvergence in Numerical Solutions: Making it Useful
Jennifer Ryan, Delft University of Technology 
APR 610AM, Warren Weaver Hall 1302
Domain Decomposition Algorithms for Some Problems Posed in H(curl)
Olof Widlund, CIMS 
MAR 3010AM, Warren Weaver Hall 1302
Moving Forward in Contact, Impact, and Dissipation: Challenges and Choices for Computing Contactconstrained Trajectories
Danny Kaufman, Columbia University 
MAR 2310AM, Warren Weaver Hall 1302
Lowfrequency Electromagnetic Scattering in Multiplyconnected Geometries
Michael O'Neil, CIMS 
MAR 1610AM, Warren Weaver Hall 1302
No Seminar
Spring Break 
MAR 910AM, Warren Weaver Hall 1302
How Long Does it Take to Compute the Eigenvalues of a Random Symmetric Matrix?
Christian Pfrang, Brown University 
MAR 210AM, Warren Weaver Hall 1302
Lyapunov Inverse Iteration for Identifying Hopf Bifurcations in Models of Incompressible Flow
Howard Elman, University of Maryland 
FEB 2410AM, Warren Weaver Hall 1302
New Numerical Methods for Solving the Advection Equation and Wave Propagation Problems
Haruhiko Kohno, Lehigh University 
FEB 1710AM, Warren Weaver Hall 1302
Spiny Disks, Flexible Fibers and Waving Rings: Explorations in Phytoplankton Fluid Dynamics
Lisa Fauci, Tulane University 
FEB 310AM, Warren Weaver Hall 1302
Efficient Methods for Detecting Lowrank Substructure
Aaditya Rangan, CIMS 
2011

DEC 910AM, Warren Weaver Hall 1302
Antibandwidth Maximization: A Map Coloring Problem
Jennifer Scott, Rutherford Appleton Laboratory, UK 
DEC 210AM, Warren Weaver Hall 1302
Using Random Models in Derivativefree Optimization
Katya Scheinberg, Lehigh University 
NOV 1810AM, Warren Weaver Hall 1302
Random Sampling Preconditioners
Haim Avron, IBM 
NOV 1110AM, Warren Weaver Hall 1302
Efficient Basis Set for KohnSham Density Functional Theory
Jianfeng Lu, CIMS 
OCT 2810AM, Warren Weaver Hall 1302
Optimal Newtontype Algorithms for Largescale Nonlinear Optimization
Coralia Cartis, University of Edinburgh 
OCT 1410AM, Warren Weaver Hall 1302
Fast Solvers for Geodynamic Flows
Scott MacLachlan, Tufts University 
OCT 710AM, Warren Weaver Hall 1302
Integral Equation Methods for Unsteady Stokes Flow
Shidong, NJIT and CIMS 
SEP 3010AM, Warren Weaver Hall 1302
Nonconforming Finite Element Methods for the Brinkman Problem and a Singularly Perturbed Fourthorder Problem
Johnny Guzman, Brown University 
SEP 2310AM, Warren Weaver Hall 1302
Computation of the Lower Spectral Radius of a Set of Nonnegative Matrices
Nicola Guglielmi, U L'Aquila 
MAY 610AM, Warren Weaver Hall No Talk
Courant 75th Anniversary
No Talk 
APR 2910AM, Warren Weaver Hall 1302
No Seminar 4/29
No Seminar 
APR 2210AM, Warren Weaver Hall 1302
No Seminar
No Seminar 
APR 1510AM, Warren Weaver Hall 1302
Algebraic Optimizable Schwarz Methods for the Solution of Banded Linear Systems and PDEs on Irregular Domains
Daniel Szyld, Temple University 
APR 810AM, Warren Weaver Hall 1302
Matrix Factorizations for Computer Network Tomography
David Bindel, Cornell 
APR 110AM, Warren Weaver Hall 1302
Aggregation of Microglia in 2D with a Gradient Weighted Moving Finite Element Method
Abigail Wacher, Durham University 
MAR 2510AM, Warren Weaver Hall 1302
Efficient Inexact Rayleigh Quotient Iteration and its Connections to the JacobiDavidson Method
Fei Xu, Temple University 
MAR 1810AM, Warren Weaver Hall No Talk
Spring Break
No Talk 
MAR 1110AM, Warren Weaver Hall 1302
** Seminar at 11:30am **TBA 3/11
George Biros, Georgia Tech 
MAR 410AM, Warren Weaver Hall 1302
FiniteVolume Schemes for Fluctuating Hydrodynamics
Aleksandar Donev, CIMS 
FEB 2510AM, Warren Weaver Hall 1302
Semidefinite Programming Applied to Ordering Problems
Franz Rendl, University of Klagenfurt 
FEB 1810AM, Warren Weaver Hall 1302
Recent Discontinuous Galerkin developments at ONERA
Juliet Ryan, ONERA & Paris 13 University 
FEB 1110AM, Warren Weaver Hall 1302
A Fast Algorithm for Sparse Matrix Computations Related to Inversion
Song Li, Stanford 
FEB 410AM, Warren Weaver Hall 1302
A Triangle Based Fast Multipole Method for Elastostatic Interactions in a Half Space
Zydrunas Gimbutas, CIMS 
JAN 2810AM, Warren Weaver Hall 1302
Diffraction Gratings and Photonic Crystals: New Integral Representations for Periodic Scattering and Eigenvalue Problems
Alex Barnett, Dartmouth College 
2010

DEC 1010AM, Warren Weaver Hall 1302
Six Myths of Interpolation and Quadrature
Nick Trefethen, Oxford University 
DEC 310AM, Warren Weaver Hall 1302
Alternating Direction Augmented Lagrangian Methods for Convex Optimization
Donald Goldfarb, Columbia University 
NOV 2610AM, Warren Weaver Hall 1302
No Seminar November 26th
no speaker 
NOV 1910AM, Warren Weaver Hall 1302
Machineadapted Methods: Highorder DG Wave Propagation on GPUs
Andreas Kloeckner, CIMS 
NOV 1210AM, Warren Weaver Hall 1302
Rankdeficient and Illconditioned Nonlinear Least Squares Problems
Carl T. Kelley, North Carolina State University 
NOV 510AM, Warren Weaver Hall 1302
An Algorithm for the Rapid Evaluation of Special Function Transforms
Michael O'Neil, CIMS 
OCT 2910AM, Warren Weaver Hall 1302
Low Mach Number Models in Computational Astrophysics
John Bell, Lawrence Berkeley National Laboratory 
OCT 2210AM, Warren Weaver Hall 1302
Sweeping Preconditioners for the Helmholtz Equation
Lexing Ying, University of Texas, Austin 
OCT 1510AM, Warren Weaver Hall 1302
Towards a Parallel Solver Environment for the Numerical Simulation of Arterial Wall Models
Axel Klawonn, University of DuisburgEssen 
OCT 810AM, Warren Weaver Hall 1302
No Seminar October 8th
no speaker 
OCT 110AM, Warren Weaver Hall 1302
The Stability of GMRES Convergence, With Application to Preconditioning by Approximate Deflation
Josef Sifuentes, CIMS 
SEP 2410AM, Warren Weaver Hall 1302
No Seminar September 24th
no speaker 
SEP 1710AM, Warren Weaver Hall 1302
Fast Algorithms for Approximating the Pseudospectral Abscissa and Pseudospectral Radius
Nicola Guglielmi, University of L'Aquila 
MAY 710AM, Warren Weaver Hall 1302
Accelerating First Order Methods For Convex Optimization Problems Arising In Machine Learning
Katya Scheinberg, Columbia University 
FEB 2610AM, Warren Weaver Hall 1302
Joint Spectral Characteristics of Matrices and Semidefinite Programming
RaphaÃ«l Jungers / MIT 
FEB 1910AM, Warren Weaver Hall 1302
Graph Expansion and CommunicationOptimal Algorithms
Olga Holtz / UC Berkeley, TUBerlin and IAS 
2009

DEC 1110AM, Warren Weaver Hall 1302
Impossibility of Approximating Analytic Functions from Equispaced Samples
Nick Trefethen, Oxford University 
DEC 410AM, Warren Weaver Hall 109
Special Day in Memory of Isaacson and Keller
TBA 
NOV 2010AM, Warren Weaver Hall 1302
The MaxFlux Functional: Derivation, Numerics, and Application to LJ38
Maria Cameron, New York University 
NOV 1310AM, Warren Weaver Hall 1302
Tractable Performance Bounds for Compressed Sensing
Alexandre d'Aspremont, Princeton University 
OCT 1610AM, Warren Weaver Hall 1302
RealTime Embedded Convex Optimization
Stephen Boyd, Stanford University 
OCT 910AM, Warren Weaver Hall 1302
Domain Decomposition Methods for Almost Incompressible Elasticity
Olof Widlund, New york University 
OCT 210AM, Warren Weaver Hall 1302
Analysis of Direct Searches for NonLipschitzian Functions
Luis Nunes Vicente, University of Coimbra