S E L E C T E D   R E C E N T     P R E S E N T A T I O N S

• Winter school, University M6 Polytechnic, Benguerir, Morocco. Feb 26, 2024
  
  [PDF] Linear and Nonlinear Methods for Data Science Applications
  
  
• ICIAM 2023 -- Tokyo, Japan August 22, 2023
  
  [PDF] Iterative linear algebra for large scale computations (John von Neumann Lecture)
  
  
• Numerical Analysis and Scientific Computation with Applications (NASCA23). Athens, Greece. July 3rd, 2023
  
  [PDF] nlTGCR: A nonlinear acceleration procedure based on Generalized Conjugate Residuals.
  
  
• Foundations of Computational Mathematics (FoCM 2023). Paris, France. June 19, 2023
  
  [PDF] Gradient-Type Subspace Iteration Methods for Symmetric Eigen-Problems
  
  
• ILAS 2023 25th conference of the international Linear algebra society. Madrid, Spain. June 15, 2023
  
  [PDF] Applications of trace estimation techniques.
  
  
• 75th Anniversary of Mathematics and Statistics at NIST (virtual meeting) June 30, 2022
  
  [PDF] The Origin and Development of Krylov Subspace Methods
  
  
• 47th Univ. of Arkansas Spring Lecture Series - Tutorial. May 4-6, 2022.
  
  • [ArkLec1.pdf] Historical Perspective; Background & Examples; Sparsity; Data structures; Relaxation methods
  • [ArkLec2.pdf] Projection methods for lin. systems, Krylov methods; Eigenvalue Pbs; Proj. Methods; Subs. it.; Lanczos
  • [ArkLec3.pdf] Backround on Graphs; Graph representations; Graphs for Data; Networks & Centrality; Graph Laplaceans
  • [ArkLec4.pdf] Graph methods; Clustering; Segmentation; Graph embedding; Dimension Reduction; Rank estimation
  • [ArkLec5.pdf] Spectral density; Supervised Learning; Neural Networks; Coarsening in scientific computing & in Data Sciences
  • [All.pdf] Everthing in one file
  • [DEMOS.zip] All matlab demos
  
  

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• Copper Mountain Conference on Iterative Methods, 2022 -- Copper Mountain, CO. Mar. 31, 2022
  
  • [PDF] Iterative methods: from theory to practice (A tutorial) - core 2 lectures (Y. Saad)
  • [PDF] Applications, Filtering (Y. Xi)
  • [PDF] Software, Applications, & Demos (R. Li)
  • [Matlab_suite.tar.gz] Matlab set of scripts used for demos in lectures by YS.
  
  
• Numerical Methods and Scientific Computing, Luminy, (France) , Nov. 12, 2021
  
  [PDF] Supspace Iteration and Variants, Revisited.
  
  
• CERFACS Tribute to Françoise Chatelin, Toulouse, France , Oct. 14, 2021
  
  [PDF] Tribute to Françoise Chatelin
  
  
• Cedya/CMA conference (Spanish Math. meeting) 2021, Gijon, Spain , June 15, 2021
  
  [PDF] Numerical Linear Algebra for data-related applications [updated version of the M2A19 talk below]
  
  
• Modelling 2019, Olomuc, Czech republic. , Sep. 18th, 2019
  
  [PDF] Parallel Multilevel Low-Rank approximation preconditioners
  
  
• The International Conference Mathematical Modeling with Applications (M2A19) Apr. 6, 2019, Rabat (Morocco)
  
  [PDF] Numerical Linear Algebra for data-related applications
  
  
• Emory University CS-Math Colloquium, Atlanta, GA, Feb 22, 2019
  
  [PDF] ``Filtering techniques for eigenvalue problems".
  
  
• CMR Workshop on Mathematical and Computational Methods for quantum systems, CRM, University of Montreal, Canada. Dec. 15 2018.
  
  [PDF] Divide and conquer algorithms and software for large Hermitian eigenvalue problems
  
  
• ICERM, Celebrating 75 years of Math. Comp. Nov 1-3, 2018 Nov. 2, 2018.
  
  [PDF] A brief journey into the past of iterative methods for solving sparse linear systems
  
  
• NASCA 2018, Kalamata, Greece. [This talk is a modified version of the one given in Padua shown next.] July 6th, 2018
  [PDF] Dimension reduction techniques: Algorithms and Applications
  
  
• Padua University, Padua, (Italy), Math. seminar June 7th, 2018
  [PDF] Dimension reduction techniques: Algorithms and Applications
  
  
• 15th Copper Mountain Conference On Iterative Methods, March 26-29, 2018, Copper Mountain, CO
  [PDF] The EVSL package for symmetric eigenvalue problems
  
  
• 2017 Meeting of the International Linear Algebra Society (ILAS-2017); July 25, 2017, Ames, IA
  [PDF] Polynomial and rational filtering for eigenvalue problems and the EVSL package (a shorter version of the Lugano talk below).
  
  
• Platform for Advanced Scientific Computing (PASC17), June 27, 2017, Lugano, Switzerland
  [PDF] Polynomial and rational filtering for eigenvalue problems and the EVSL project
  
  
• Platform for Advanced Scientific Computing (PASC17), June 28, 2017, Lugano, Switzerland
  [PDF] Spectral densities: computations and applications in linear algebra.
  
  
• SMAI 2017 Bi-annual French Congress in Industrial and Applied Mathematics June 6th, 2017, Ronce les Bains, France
  [PDF] Low-rank correction preconditioning techniques.
  
  
• Rencontre en Algebre Lineaire Numerique Amiens-Calais May 30th, 2017, Amiens, France
  [PDF] Applications of trace estimation techniques (same talk as in HPCSE17 next)
  
  
• High Performance Computing in Science and Engineering (HPCSE17) May 24, 2017, Beskydy Mountains (near Ostrawa), Czech republic.
  [PDF] Applications of trace estimation techniques
  
  
• MATH + X Symposium on Seismology and Inverse Problems Jan 19, 2017, Rice University, Houston, TX.
  [PDF] Divide and conquer algorithms and software for large Hermitian eigenvalue problems.
  
  
• SIAM CSE-2017, Feb 28, 2017, Atlanta, GA.; Minisymposium on excited states.
  [PDF] "Polynomial and rational function filtering techniques for Hermitian eigenvalue problems"
  
  
• Purdue Oct 7th, 2016, Samuel Conte Distinguished lecture, Purdue University, West-Lafayette, IN.
  [PDF] " Divide and conquer algorithms and software for large Hermitian eigenvalue problems"
  
  
• PMAA-16 July 8, 2016, Bordeaux (France).
  [PDF] " Filtered thick restart Lanczos algorithm and the EVSL package."
  
  
• PMAA-16 July 7, 2016, Bordeaux (France).
  [PDF] "Applications of trace estimation techniques."
  
  
• Valenciennes - Meeting in memory of Mohammed Bellalij. May 19th, 2016, Valenciennes (France).
  [PDF] "The trace ratio optimization problem."
  
  
• One day meeting on ``Matrix scientific computing" May 18th, 2016, Calais (France).
  [PDF] "Dimension reduction methods: Algorithms and Applications."
  
  
• HPC days in Lyon April 8th, 2016, Lyon (France).
  [PDF] "High performance numerical linear algebra: trends and new challenges."
  
  
• IMA Data Lab talk - IMA. Nov. 10, 2015. This is a shorter version of the Kalamata talk:
  
  [PDF] "Sampling Algorithms in Numerical Linear Algebra and their applications".
  
  
• ICERM Workshop on Numerical Methods for Large-Scale Nonlinear Problems and Their Applications ; Providence, RI Aug. 31, 2015.
  
  [PDF] "Acceleration, inexact Newton, and Nonlinear Krylov subspace methods"
  
  
• Berkeley, applied math. seminar; Berkeley, CA .   Apr. 22, 2015. (A different version of this talk was given in Greifswald)
  
  [PDF] "Divide and conquer algorithms for large eigenvalue problems"
  
  
• Stanford, ICME distinguished speaker series ; Palo Alto, CA.   Apr. 20, 2015. (Updated version of the Modelling 2014 talk)
  
  [PDF] "Parallel multilevel low-rank preconditioners"
  
  
• College of William and Mary - CS colloq. ; Williamsburg, VA Oct. 31, 2014.
  
  [PDF] "Numerical Linear ALgerba Methods for Data Mining".
  
  
• SLA-2014 ; Kalamata, Greece, Sep. 8 -- 12, 2014.
  
  [PDF] "Sampling Algorithms in Numerical Linear Algebra and their applications".
  
  
• Parallel Matrix Algorithms and Applications (PMAA-2014) ; Lugano, Switzerland; July 2-4, 2014.
  
  [PDF] "Density of states and eigenvalue counts via approximation theory methods".
  
  
• Parallel Matrix Algorithms and Applications (PMAA-2014). Lugano, Switzerland; July 2-4, 2014.
  
  [PDF] " Divide and conquer algorithms for large eigenvalue problems".
  
  
• Modelling-14, Rosnov, Czech republic June 2nd, 2014
  
  [PDF] "Multilevel Low-Rank preconditioners"
  
  
• EPASA 2014 Tsukuba, Japan, March 8, 2014
  
  [PDF] "Sampling algorithms in numerical linear algebra and their applications"
  
  
• SIAM PP 2014 conference, Portland, OR, 02/21/2014.
  
  [PDF] ``Multilevel Low-Rank preconditioners"
  
  
• North Carolina State University, ECE Interdisciplinary Distinguished Seminar. NCSU, Jan 31, 2014
  
  [PDF] ``Linear algebra methods for data mining"
  
  
• Caltech Applied Math colloquium, Pasadena, Nov 12, 2013
  
  [PDF] ``Sampling algorithms in numerical linear algebra and their application"
  
  
• Syracuse University Applied Math Colloquium, Syracuse, NY, Sep. 20, 2013
  
  [PDF] ``Multilevel preconditioning techniques with applications"
  
  
• SIAM CSE 2013 conference, Boston, MA, Feb. 25 - Mar 1st, 2013.
  
  [PDF] ``Polynomial filtering for interior eigenvalue problems"
  
  
• SIAM CSE 2013 conference, Boston, MA, Feb. 25 - Mar 1st, 2013.
  
  [PDF] ``Multilevel low-rank approximation preconditioners"
  
  
• 2012 SIAM Annual meeting, Minneapolis, MN, July 9--13, 2012.
  
  [PDF] ``Linear algebra methods for data mining with applications to materials",
  
  
• SIAM Conference on Applied Linear Algebra, Valencia Spain, June 18--22, 2012.
  
  [PDF] "The new challenges to Krylov subspace methods"
  
  
• The International Conference on Scientific Computing 2012 Hong-Kong, Jan. 4-7, 2012.
  
  [PDF] "Linear algebra methods for data mining with applications to materials"
  
  
• Purdue Univ., Math-CS colloquium, Lafayette, IN, April 6th, 2011.
  
  [PDF] "Multilevel preconditioning techniques with applications"
  [updated from the Nancy talk below]
  
  
• Sparse days 2010, CERFACS, Toulouse (France), June 15th, 2010.
  
  [PDF] "Computing the diagonal of the inverse of a sparse matrix"
  
  
• Charles Hermite, one-day workshop on meshing and PDEs, Nancy (France) June 9th, 2010.
  
  [PDF] "Multilevel preconditioning techniques with applications"
  [Note: essentially the same talk was given at ETH, Zurich, on March 17th, 2010.
  
  
• Computer Science & Eng. Colloquium - Fall 09 Nov. 9th, 2009
  
  [PDF] "From data-mining to nanotechnology and back: The new problems of numerical linear algebra".
  [Note: This is an updated version of the Modelling-09 talk -- see below]
  
  
• 2009 SIAM Conference on Applied Linear Algebra Monterey, CA.
  
  (Mini-Symposium on Density Functional Theory) Oct. 27th, 2009
  [PDF] "Nonlinear Subspace Iteration with applications to DFT"
  
  
• Precond-09, Hong-Kong August 25th, 2009
  
  [PDF] "Coarsening based algebraic multi-level preconditioners" [note: 2nd half of this talk is a non-technical presentation]
  
  
• Modelling-09, Rosnov, Czech republic June 22nd, 2009
  
  [PDF] "From data-mining to nanotechnology and back: The new problems of numerical linear algebra"
  
  
• NASCA-09, Agadir (Morroco) May 20th, 2009
  
  [PDF] "Dimension reduction and graph based methods in data mining"
  
  
• Numan08, Kalamata (Greece). Sept. 5th, 2008
  
  [PDF] "Efficient linear algebra methods in data mining"
  
  
• Householder Symposium XVII, Zeuthen (Germany). June 6th, 2008
  
  [PDF] "A brief tour of the spectral problems of data mining".
  
  
• Fifth Montreal Scientific Computing Days, University of Montreal.
  
  Montreal, Canada, April 30th-May 2nd, 2008.
  "A tutorial on: Iterative Methods for Sparse Matrix Problems".
  • [PDF] Lecture 1 (Sparse matrices, basics on reordeting, relaxation methods)
  • [PDF] Lecture 2 (Projection methods, Krylov methods, standard preconditioners)
  • [PDF] Lecture 3 (Multilevel preconditioners, ARMS, ddPQ, parallel implementations)
  • [*.tar.gz] Matlab Demos for Lectures 1 and 2.
  • [*.tar.gz] Matlab Demos for Lecture 3. See also the somewhat more complete [if a little outdated] Calais tutorial which I gave in Calais in 2005.
  
  
• Ninth IMACS Inter. Symp. on Iterative Methods, Lille (France). March. 18th, 2008,
  and Institut Camille Jordan, Lyon (France) March 25th :
  
  [PDF] "Preconditioning techniques for highly indefinite linear systems".
  
  
• Workshop on Solution Methodologies for Scattering Problems, Pau (France). Dec. 12th, 2007:
  
  [PDF] "Preconditioning techniques for highly indefinite systems".
  
  
• Workshop ``Matrix Analysis and Applications," CIRM, Luminy, France. Oct. 18th, 2007:
  
  [PDF] "Efficient Linear Algebra Methods in Data Mining"
  
  
• University of Queensland, Brisbane, Australia , Sept. 21st, 2007:
  
  [PDF] "Solving large eigenvalue problems in electronic structure calculations"
  
  
• Queensland Univ. of Technology, Brisbane, Australia , Sept. 14th, 2007:
      [PDF] Recent progress in preconditioned Krylov methods
  
  
• Tutorial on Iterative Methods for Large Sparse Matrix Problems Calais, France, Jan 20--28, 2005     Calais Tutorial