Recycling Krylov Subspaces for Sequences of Linear Systems: Convergence Analysis, 45 minute plenary lecture at the Householder XVI Symposium on Numerical Linear Algebra, Seven Springs Mountain Resort, Champion, PA, May 23-27, 2005.
Scientific Computing and Imaging Institute, University of Utah, Salt Lake City, Utah, May 9-11, 2005, Fast Solvers for Long Sequences of Linear Systems,
Parallel Multilevel Preconditioners for Simulations on Adaptively Refined Meshes, 5th Symposium of the Los Alamos Computer Science Institute (LACSI), AMR Workshop, Santa Fe, New Mexico, October 12-14, 2004.
Optimization Technology Center and Northwestern University (broadcast through Access Grid), Evanston, Illinois, October 6, 2004, Probing for Schur Complements and Preconditioning Generalized Saddle-Point Problems,
Department of Mathematics and Computer Science, Emory University, Atlanta, Georgia, March 17-19, 2004, Iterative Solution of a Sequence of Linear Systems,
SCCM Program, Stanford University, February 27, 2004, Iterative Solution of a Sequence of Linear Systems,
Department of Computer Science, University of Maryland at College Park, December 9-11, 2004, Preconditioners for Generalized Saddle-Point Problems,
Preconditioners for Generalized Saddle-Point Problems, Solution Methods for Saddle-Point Systems in Computational Mechanics, workshop organized by Sandia National Labs and the SCCM Program, Stanford, Santa Fe, New Mexico, December 3-6, 2004,
Updating, Truncating, and Reusing Krylov Spaces, Dagstuhl Seminar on Theoretical and Computational Aspects of Matrix Algorithms, Schloss Dagstuhl, Wadern, Germany, October 11-18, 2003.
Department of Mathematics, Tufts University, September 17-21, 2004, Iterative Solution of a Sequence of Linear Systems,
Parallel Multi-Physics Integration Frameworks for Virtual Rocket Science, in Minisymposium ‘Supporting Infrastructures for Computational Mechanics Applications’ (Carter Edwards), 7th US National Congress on Computational Mechanics 2003, July 27-30, 2003, Albuquerque, NM.
Preconditioning Saddle-point Problems using Cheap Approximations to the Schur Complement, in Minisymposium Analysis and Algorithms for Ill-conditioned Saddle-point Systems (Kim-Chuan Toh), ICIAM 2003, July 7-11, 2003, Sydney, Australia.
Krylov Methods for Lattice QCD, Third International Workshop on Numerical Analysis and Lattice QCD, University of Edinburgh & UK National e-Science Centre, e-Science, Institute, Edinburgh, Scotland, June 30 – July 4, 2003 (canceled due to accident of my wife),
Inner-outer iteration for a sequence of linear systems, Sparse Matrices and Grid Computing, St Girons Deux, June 10-13, 2003, St. Girons, France (canceled due to accident of my wife),
Preconditioning Saddle Point Problems using Cheap Approximations to the Schur Complement, ETNA: Following the Flows of Numerical Analysis, Kent, OH, May 29-31, 2003.
Oxford Computing Lab, Oxford University, February 5-8, 2003, Preconditioning Indefinite Linear Systems Using Cheap Approximations to the Schur Complement (postponed due to visa problems)
Department of Mathematics, TU Berlin, February 9-13, 2003, Preconditioning Indefinite Linear Systems Using Cheap Approximations to the Schur Complement (postponed due to visa problems)
Ecole Polytechnique de Montreal, Dept. of Computer Science, Montreal, Canada, November 19-23, 2002, Algorithmic and Accuracy Issues in Surface Parameterization,
Centre de Recherche en Calcul Applique (CERCA), Montreal November 19-23, 2002, Fast Solution of Symmetric and Nonsymmetric Indefinite Problems,
Preconditioning for Symmetric and Nonsymmetric Indefinite Linear Systems, Second ASCI Tri-Labs Apps-Driven Solver Workshop (Joel Dendy/DOE), August 13-15, 2002, Monterey, CA.
Conference on Discrete Geometry with Applications to Science and Medicine (NSF sponsored workshop organized/invited by Monica Hurdal), Wakulla Spring (State Park and Lodge), Florida, May 16-19, 2002. (canceled due to illness of my wife)
Fast Solution Methods and Preconditioners for Symmetric and Nonsymmetric Indefinite Systems, Plenary presentation at the 15th Householder Symposium in Numerical Linear Algebra (June 2002).
Norm-wise and Iteration-wise Bounds on the Convergence of Krylov Subspace Methods relative to GMRES, in Minisymposium on Fundamentals of Krylov Subspace Methods (Anne Greenbaum and Nick Trefethen), Copper Mountain Conference on Iterative Methods, Copper Mountain, Colorado, March 24-29, 2002.
Coupling Stand-alone Applications and Existing Frameworks for Large-scale, Parallel, Multi-physics Simulations, Fifth World Congress on Computational Mechanics (WCCM-V), July 7-12, 2002, Vienna University of Technology, Vienna, Austria, in minisymposium “Supporting Infrastructures for Computational Mechanics”. (did not attend due to illness daughter)
Accuracy and Algorithmic Issues in Surface Parameterization, Fifth AFA Conference on “Curves and Surfaces”, June 27-July 3, 2002, St. Malo, Bretagne, France, in minisymposium “Parameterization and Surface Reconstruction” (Michael Floater).
University of Leiden (Netherlands), Department of Mathematics, January 7, 2002, Fast Solution Methods and Preconditioners for Symmetric and Nonsymmetric Indefinite Systems,
University of Utrecht (Netherlands), Department of Mathematics, December 14, 2001 - January 12, 2002 (1 month), Fast Solution Methods and Preconditioners for Symmetric and Nonsymmetric Indefinite Systems,
Extending and truncating the search space in the Jacobi-Davidson Algorithm, SIAM Conference on Numerical Linear Algebra, Raleigh, North-Carolina, USA, October 23-26, 2000 (minisymposium on Invariant Subspaces).
Analysis of Newton and Newton-Krylov Methods for Nonlinear Problems with Ill-conditioned Jacobians, Workshop on Solution Methods for Large-Scale Nonlinear Problems, Lawrence Livermore National Laboratory, CASC/Institute for Terascale Simulation, Livermore, CA, July 26-28, 2000.
Sandia National Laboratories, June 4-20, 2000 (no presentation), collaboration on linear solvers.
Lawrence Livermore National Laboratory/CASC, Livermore, CA, March 12-19, 2000, Programming Environments for Multi-Application Simulation.
Analyzing Krylov Subspace Methods by their Projections, 2000 Joint Mathematics Meetings (AMS/MAA/SIAM), Washington DC, January 19-22, 2000 (minisymposium on the Analysis of Krylov Subspace Methods).
Ecole Polytechniqe / Centre de Mathematiques Appliquées, Paris (Palaiseau), France, 3-5 January, 2000, Three-dimensional, Integrated, Simulation of Solid Propellant Rockets (overview).
Universite Paris VI Pierre et Marie Curie / Laboratoire d’Analyse Numerique, Paris, France, January 3, 2000, Three-dimensional, Integrated, Simulation of Solid Propellant Rockets - coupling applications on separate grids.
Argonne National Laboratory / Mathematics and Computer Science Division, Chicago, Illinois, USA, December 9, 1999, A Programming Environment for Multi-Application Simulations.
Emory University / Department of Mathematics, Atlanta, Georgia, USA, December 2-5, 1999, Fast and Robust Short Recurrence Krylov Subspace Methods.
Swiss Federal Institute of Technology (ETH Zurich) / Department of Civil and Environmental Engineering (VAW), Zurich, Switzerland, July 15-August 1, 1999, Fellow of the European Research Consortium on Flow, Turbulence, and Combustion (ERCOFTAC), Integrated, Threedimensional,Simulation of Solid Propellant Rockets.
BiCG Explained, Householder Symposium XIV, Chateau Whistler, Whistler, BC, Canada, June 13-19, 1999.
The Convergence of BiCG, A Mathematical Journey through Analysis, Matrix Theory, and Scientific Computing: A Conference in Honor Richard Varga's 70th Birthday, Kent State University, Kent, OH, USA, March 25-27, 1999.
Los Alamos National Laboratory, Los Alamos, NM, USA, March 17-18, 1999, The Convergence of BiCG.
Sandia National Laboratories, Albuquerque, NM, USA, March 15-16,19, 1999,
Truncation of Optimal Krylov Subspace Methods,
The Convergence of BiCG.
Technische Universität Bergakademie Freiberg / Institut für Angewandte Mathematik II, Freiberg, Germany, 11-15 November, 1998, The Convergence of BiCG.
College of William and Mary / Department of Computer Science, Williamsburg, Virginia, USA, 21-27 October, 1998, Truncation Strategies for Optimal Krylov Subspace Methods.
Variations on the Jacobi-Davidson Theme, plenary lecture, Fourth IMACS International Symposium on Iterative Methods in Scientific Computation, honoring the 75th birthday of David M. Young, Austin, Texas, USA, October 18-20, 1998.
University of Illinois at Urbana-Champaign / Center for Simulation of Advanced Rockets, USA, 7-11 July, 1998, HPF for Regular, Block-structured, and Irregular, Grid-based Applications.
Panel member in the Forum Discussion at the High Performance Fortran User Group Conference 1998 (HUG’98), Porto, Portugal, 25-26 June, 1998, The Future of High Performance Fortran.....
Katholieke Universiteit Leuven (KUL), Leuven, Belgium, 22-24 April, 1998, Implementation Aspects and Parallelism in Krylov Methods. (in KUL-UCL Graduate Courses in Numerical Analysis / Seminar Series: Iterative Methods for Large Scale Systems and Eigenvalue Problems, organized by Paul Van Dooren and Stefan Vandewalle)
Efficient Parallel Implementations of Krylov Subspace Methods,
Message Passing and Data Parallel Implementation Strategies,
Truncation Strategies for Optimal Krylov Subspace Methods.
Oak Ridge National Laboratory / Mathematical Sciences Section, TN, USA, 24-28 March, 199
The Convergence of BiCG
Parallel Iterative Solvers for Irregular Sparse Matrices in High Performance Fortran.
University of Pavia / Institute for Numerical Analysis, Pavia, Italy, 3-6 March, 1998, The Convergence of BiCG.
Stanford University / SCCM / Dept. Computer Science, USA, 18-21 February, 1998, Parallel Iterative Solvers for Irregular Sparse Matrices in High Performance Fortran.
Ecole Polytechniqe / Centre de Mathematiques Appliquées, Paris (Palaiseau), France, 2-6 February, 1998.
The Convergence of BiCG.
Parallel Iterative Solvers for Irregular Sparse Matrices in High Performance Fortran.
Universite de Geneve / Departement d’Econometrie, Geneva, Switzerland, 19 December, 1997, An Introduction to Iterative Methods and their Applications. (in Seminaires de Recherche du Departement d’Econometrie)
Australian National University/Computer Sciences Laboratory, Canberra, Australia, 10-16 November, 1997.
Truncation Strategies for Optimal Krylov Subspace Methods.
Parallel Iterative Solvers for Irregular Sparse Matrices in High Performance Fortran.
Stanford University / SCCM, USA, June 30 - August 12, 1997, Truncation Strategies for Optimal Krylov Subspace Methods.
A Robust and Efficient Truncated GMRES, Third IMACS International Symposium on Iterative Methods in Scientific Computation, Jackson Hole, Wyoming, USA, July 9-12, 1997. (in minisymposium)
Truncation Strategies for Optimal Krylov Subspace Methods, Leslie Fox Prize Meeting 1997, University of Dundee, Scotland, June 23, 1997. Awarded 2nd Prize.
University of Basel/Institut für Informatik, Switzerland, 12-14 May, 1997, High Performance Fortran Course. (3 days)
M.I.T./Lab. for Computer Science, Cambridge MA, USA, 14-18 October, 1996, Parallel Solution of Irregular Sparse Problems using High Performance Fortran. (in Supercomputing Technologies Seminar)
Inner-Outer Methods with Deflation for Linear Systems with Multiple Right Hand Sides, Householder Symposium XIII, 17-21 June, 1996, Pontresina, Switzerland.
CERFACS, Toulouse, France, July 20-23, 1996, Truncation Strategies for Krylov Subspace Methods (in CERFACS Seminars).
Stanford University/SCCM, USA, 15-19 April, 1996, Inner-Outer Methods with Deflation for Linear Systems with Multiple Right Hand Sides.
EPFL/COSMASE, EPFL Lausanne, Switzerland, 12-16 February, 1996, in Parallel Computation Course, Introduction to High Performance Fortran. (1 day)
CRS4 (Centre for Advanced Studies, Research, and Development in Sardinia), Cagliari, Italy, 16-21 January, 1996.
HPF for Realistic Problems,
Nested Iterative Methods.
K.U. Leuven, Belgium, 11-13 September, 1995, in Parallel Computing Course organized by MMARIE (European Community MAST II Programme) and K.U. Leuven (Catholic University of Leuven)
High Performance Fortran
Parallelisation of Krylov Subspace Methods.
Inner-Outer Methods with Deflation for Multiple Right Hand Sides, plenary lecture, Workshop on Large Sparse Matrix Computations and Lattice Quantum Chromodynamics, University of Kentucky, Lexington, USA, August 31-September 2, 1995.
Delft University of Technology, The Netherlands, 18-20 April, 1995, Parallelizing Applications with High Performance Fortran on the Intel Paragon.
GMD and University Cologne, Sankt Augustin, Germany, 3 March, 1995, High Performance Fortran on the Intel Paragon.
EPFL and Cray PATP, Lausanne, Switzerland, 31 January, 1995, High Performance Fortran on the Intel Paragon.
K.U. Leuven (Catholic University of Leuven), Belgium, 7 June, 1994, Nested GMRES and Preserving the Optimality in the Inner Iteration.
Delft University of Technology, The Netherlands, 31 May - 3 June, 1994, in CWI-RUU Symposia on Massively Parallel Computing and Applications and Parallel Computing in Fluid Dynamics (course), IBLU Preconditioners on Overlapping Subdomains for Massively Parallel Computing.
Interdisciplinary Project Center for Supercomputing, ETH Zurich, Switzerland, 13-15 July, 1993, Iterative Solution of Large Linear Systems on Massively Parallel Computers.
Swiss Scientific Computing Center CSCS-ETHZ, Manno, Switzerland, April 22, 1993, in Swiss High Performance Computing Seminar, The Efficient Implementation of Conjugate Gradient-like Methods on Massively Parallel Computers.
The IBM Europe Institute Seminar/Workshop on Highly Parallel Computing Systems, Oberlech, Austria, 13-17 July, 1992, (no presentation).
A Parallel Variant of GMRES(m), IMACS World Congress on Computation and Applied Mathematics, Trinity College Dublin, Ireland, July 22-26, 1991. (in minisymposium)