Presentations

INVITED LECTURES IN CONFERENCES

• Efficient Methods for Least-Norm Regularization.
  Workshop Numerical Linear Algebra - Algorithms, Applications, and Training, Delft, The Netherlands, April 2012.
  
  
• New Methods for Least-Norm Regularization.
  Householder Symposium XVIII, Tahoe City, California, U.S.A., June 2011.
  
  
• Efficient Methods for Least-Norm Regularization.
  Workshop on Optimization, Design and Control, Oxford, U.K., September 2010.
  
  
• Large-Scale Eigenvalue Problems in Trust-Region Calculations.
  2nd International Kyoto Forum 2010 on Krylov Subspace Methods, Kyoto, Japan, March 2010.
  
  
• Trust Regions in Large-Scale Optimization and Regularization.
  GAMM Workshop Applied and Numerical Linear Algebra with special emphasis on Regularization of Ill-Posed Problems, Hamburg, Germany, September 2008.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  Householder Symposium XVII, Zeuthen, Germany, June 2008.
  
  
• TRUSTμ: An Interior-Point Method for Large-Scale Non-Negative Regularization.
  Gene Golub Around the World, Delft, The Netherlands, February 29, 2008.
  
  
• Large-Scale Nonnegative Regularization.
  Householder Symposium XV, Peebles, Scotland, UK, June 2002.
  
  
• Large-Scale Eigenvalue Problems and the Regularization of Discrete Ill-Posed Problems.
  Plenary talk, Householder Symposium XIV, Whistler, British Columbia, Canada, June 1999.
  
  
• Regularization of Large-Scale Discrete Ill-Posed Problems.
  Mathematical Journey through Analysis, Matrix Theory and Scientific Computation: a conference on the occasion of Richard S. Varga's 70th birthday, Kent, Ohio, U.S.A., March 1999.

• The LSTRS Software for Large-Scale Trust-Region Subproblems and Regularization.
  Smart Wells/ISAPP Meeting, Delft University of Technology, Delft, The Netherlands, October 2010.
  
  
• Accelerating the LSTRS Algorithm.
  Department of Mathematical and Computing Sciences, Tokyo Institute of Technology, Tokyo, Japan, March 2010.
  
  
• Optimization Techniques for Large-Scale Inverse Problems.
  Central Research Laboratory, Hitachi, Ltd., Tokyo, Japan, March 2010.
  
  
• The LSTRS Software for Large-Scale Trust-Region Subproblems and Regularization.
  Computational Science Workshop, Department of Mathematics, Keio University, Yokohama, Japan, March 2010.
  
  
• Accelerating the LSTRS Algorithm.
  Linear Algebra and Optimization Seminar, Institute for Computational Mathematics and Engineering, Stanford University, Stanford, California, U.S.A., October 2009.
  
  
• Optimization Techniques for Large-Scale Inverse Problems.
  Vision Lab, University of Antwerp, Antwerp, Belgium, March 2009.
  
  
• Teaching Programming.
  Department of Informatics, University of Bergen, Bergen, Norway, February 2009.
  
  
• Trust Regions in Large-Scale Optimization and Regularization.
  Department of Mathematics, Temple University, Philadelphia, Pennsylvania, U.S.A., October 2008.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  Modelling, Analysis and Simulation Seminars, Centrum voor Wiskunde en Informatica (CWI) (Center for Mathematics and Informatics), Amsterdam, The Netherlands, June 2008.
  
  
• A Trust-Region Approach to the Regularization of Large-Scale Discrete Forms of Linear Ill-Posed Problems.
  Faculty of Science, Computer Science School, Central University of Venezuela, Caracas, Venezuela, January 2008.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  Department of Mathematical and Computing Sciences, Tokyo Institute of Technology, Tokyo, Japan, November 2007.
  
  
• Large-Scale Optimization.
  IMM Seminar, Department of Informatics and Mathematical Modelling, Technical University of Denmark, Lyngby, Denmark, September 2007.
  
  
• LSTRS 1.2: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  IMM Seminar, Department of Informatics and Mathematical Modelling, Technical University of Denmark, Lyngby, Denmark, April 2007.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  Optimization Group Seminar, Department of Information Systems and Algorithms, Delft University of Technology, Delft, The Netherlands, January 2006.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  Department of Informatics and Mathematical Modelling, Technical University of Denmark, Lyngby, Denmark, August 2005.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  Center for Research and Advanced Training in Scientific Computing (CERFACS), Toulouse, France, November 2003.
  
  
• An Interior-Point Trust-Region-Based Method for Large-Scale Non-Negative Regularization.
  Laboratory of Mathematics for Industry and Physics, Paul Sabatier University, Toulouse, France, October 2003.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  Department of Informatics and Mathematical Modelling, Technical University of Denmark, Lyngby, Denmark, August 2003.
  
  
• Large-Scale Optimization Techniques for the Regularization of Ill-Posed Problems.
  Mathematical and Computational Sciences Division, NIST (National Institute of Standards and Technology), Gaithersburg, Maryland, U.S.A., May 2003.
  
  
• Large-Scale Nonnegative Regularization.
  Scientific Computing and Computational Mathematics, Stanford University, Stanford, California, U.S.A., November 2002.
  
  
• Large-Scale Nonnegative Regularization.
  Department of Mathematical Modelling, Technical University of Denmark, Lyngby, Denmark, March 2002.
  
  
• Trust-Region-Based Optimization Techniques for the Regularization of Large-Scale Discrete Forms of Ill-Posed Problems.
  Department of Mathematics, Linköping University, Linköping, Sweden, March 2002.
  
  
• Trust Regions and the Regularization of Large-Scale Discrete Forms of Ill-Posed Problems. INRIA, Rocquencourt, France, March 2001.
  
  
• Trust Regions and the Regularization of Large-Scale Discrete Forms of Ill-Posed Problems.
  Department of Mathematical Modelling, Technical University of Denmark, Lyngby, Denmark, March 2001.
  
  
• Trust Regions and the Regularization of Large-Scale Discrete Forms of Ill-Posed Problems.
  ExxonMobil Upstream Research, Houston, Texas, U.S.A., February 2001.
  
  
• Trust Regions and the Regularization of Large-Scale Discrete Forms of Ill-Posed Problems.
  Department of Mathematics, Wake Forest University, Winston-Salem, North Carolina, U.S.A., January 2001.
  
  
• A Matrix-Free Method for the Large-Scale Trust-Region Subproblem.
  Institute for Analysis and Computational Mathematics. Department of Computational Mathematics and Optimization, Johannes Kepler University Linz, Linz, Austria, December 2000.
  
  
• A Matrix-Free Method for the Large-Scale Trust-Region Subproblem.
  Centre for Mathematics, University of Coimbra, Coimbra, Portugal, February 2000.
  
  
• A Matrix-Free Method for the Large-Scale Trust-Region Subproblem.
  Laboratory of Mathematics for Industry and Physics, Paul Sabatier University, Toulouse, France, February 2000.
  
  
• Large-Scale Eigenvalue Problems, Trust Regions and the Regularization of Discrete Ill-Posed Problems.
  TRIP Seminar, Department of Computational and Applied Mathematics, Rice University, Houston, Texas, U.S.A., October 1999.
  
  
• A Trust-Region Approach to the Regularization of Large-Scale Discrete Ill-Posed Problems.
  Department of Informatics, University of Bergen, Bergen, Norway, May 1999.
  
  
• An Introduction to the Numerical Treatment of Ill-Conditioned Linear Systems and Least Squares Problems.
• A Trust-Region Approach to the Regularization of Large-Scale Discrete Ill-Posed Problems.
  Department of Mathematics, Instituto Tecnológico Autónomo de México (ITAM), Mexico City, Mexico, September 1998.
  
  
• A Large-Scale Trust-Region Approach to the Regularization of Inverse Problems.
  Western Atlas Logging Services, Research Seminar, Houston, Texas, U.S.A., June 1998.
  
  
• Introduction to Parallel Numerical Methods.
  Department of Mathematics, Federal University of Rio de Janeiro, Ilha do Fundão, Rio de Janeiro, Brazil, April 1990.

• Large-Scale Eigenvalue Problems, Trust Regions and Regularization.
  Minisymposium "Matrix Computations in Large-Scale Optimization," 9th SIAM Conference on Optimization, Boston, Massachusetts, U.S.A., May 2008.

• Efficient Methods for Least-Norm Regularization.
  10th SIAM Conference on Optimization, Darmstadt, Germany, May 2011.
  
  
• Solving Large-Scale Eigenvalue Problems from Optimization.
  SIAM Conference on Applied Linear Algebra, Monterey Bay-Seaside, California, U.S.A., October 2009.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  9th IMACS International Symposium on Iterative Methods in Scientific Computing, Lille, France, March 2008.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  Computational Methods with Applications, Harrachov, Czech Republic, August 2007.
  
  
• Surrogate modeling for geometry optimization in material design.
  6th International Congress on Industrial and Applied Mathematics ICIAM07, Zürich, Switzerland, July 2007.
  
  
• Surrogate Modeling for Electronic-Structure Calculations.
  Surrogate Modelling and Space Mapping for Engineering Optimization SMSMEO-06, Lyngby, Denmark, November 2006.
  
  
• A Comparison of Methods for the Large-Scale Trust-Region Subproblem.
  12th International Congress on Computational and Applied Mathematics ICCAM 2006, Leuven, Belgium, July 2006.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  11th International Congress on Computational and Applied Mathematics ICCAM 2004, Leuven, Belgium, July 2004.
  
  
• Large-Scale Optimization Techniques for Nonnegative Image Restorations.
  47th Annual Meeting of the Society for Photo-Optical Engineering (SPIE), Seattle, Washington, U.S.A., July 2002.
  
  
• An Interior-Point Trust-Region-Based Method for Large-Scale Nonnegative Regularization.
  47th Annual Meeting of the Society for Photo-Optical Engineering (SPIE), Seventh SIAM Conference on Optimization, Toronto, Ontario, Canada, May 2002.
  
  
• Optimization Techniques for Large-Scale Discrete Forms of Ill-Posed Problems.
  Applied Inverse Problems 2001, Montecatini Terme, Italy, June 2001.
  
  
• Optimization Techniques for Image Restoration Problems.
  17th International Symposium on Mathematical Programming ISMP 2000, Atlanta, Georgia, U.S.A., August 2000.
  
  
• A Trust-Region Approach to the Regularization of Large-Scale Discrete Ill-Posed Problems.
  SFB-Conference on Inverse Problems, Strobl/St. Wolfgang, Austria, June 2000.
  
  
• A New Method for the Large-Scale Trust-Region Subproblem.
  Sixth SIAM Conference on Optimization, Atlanta, Georgia, U.S.A., May 1999.
  
  
• Trust Regions and the Regularization of Discrete Ill-Posed Problems.
  Fifth SIAM Conference on Mathematical and Computational Issues in the Geosciences, San Antonio, Texas, U.S.A., March 1999.
  
  
• Different Preconditioning Strategies for the Conjugate Gradient Method.
  First Panamerican Workshop for Applied Mathematics, Caracas, Venezuela, January 1993.
  
  
• A Preconditioner for the Conjugate Gradient Method.
  V Mathematics School, San Cristóbal, Táchira, Venezuela, June 1992.
  
  
• Implementation of a Primal Potential Reduction Algorithm for Linear Programming.
  Fourth SIAM Conference on Applied Linear Algebra, Minneapolis, Minnesota, U.S.A., September 1991.
  
  
• Efficient Implementation of Interior Point Methods for Linear Programming.
  PANEL'91, XVII Latin American Conference on Informatics, Caracas, Venezuela, July 1991.
  
  
• Some Considerations for the Implementation of a Primal Potential Reduction Algorithm for Linear Programming.
  IV Mathematics School, Caracas, Venezuela, April 1991.
  
  
• Natural Language Processing with Applications.
  First Workshop of the Comtrad Group of Venezuela, Puerto Ordaz, Bolívar, Venezuela, October 1989.

• Surrogate Modeling for Electronic-Structure Calculations.
  Mathematical and Algorithmic Challenges in Electronic Structure Theory, Institute for Mathematics and its Applications, University of Minnesota, Minneapolis, Minnesota, September 29-October 4, 2008.

• Efficient Solution of the Optimization Problem in Model-Reduced Gradient-Based History Matching.
  SIAM Conference on Computational Science and Engineering, Boston, Massachusetts, U.S.A., February 2013.
  
  
• Efficient Methods for Least-Norm Regularization.
  7th International Congress on Industrial and Applied Mathematics ICIAM2011, Vancouver, British Columbia, Canada, July 2011.
  
  
• Surrogate Modeling for Geometry Optimization in Material Design.
  15th European Conference on Mathematics for Industry ECMI 2008, London, United Kingdom, July 2008.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  9th SIAM Conference on Optimization, Boston, Massachusetts, U.S.A., May 2008.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems and Regularization.
  6th International Congress on Industrial and Applied Mathematics ICIAM2007, Zürich, Switzerland, July 2007.
  
  
• A Comparison of Methods for the Large-Scale Trust-Region Subproblem.
  Sparse Days at CERFACS, Toulouse, France, June 2006.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems.
  12èmes Journées du Groupe MODE, Le Havre, France, March 2004.
  
  
• LSTRS: MATLAB Software for Large-Scale Trust-Region Subproblems.
  Sparse Days and Grid Computing at St. Girons, St. Girons, France, June 2003.
  
  
• Regularization of Discrete Ill-Posed Problems.
  Annual Meeting of the Center for Research in Parallel Computation (CRPC), Houston, Texas, U.S.A., May 1997.