Presentations

98 | 99 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12

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Compressed Postscript, PDF or powerpoint copies of the following recent talks given by group members are available:

2012

• January 19th
  J.A. Scott
  Antibandwidth maximization: a map coloring problem
  STFC Rutherford Appleton Laboratory
  
  
• January 17th
  J.A. Scott
  Antibandwidth maximization: a map coloring problem
  University of Reading
  
  

2011

• December 9th
  J.A. Scott
  Antibandwidth maximization: a map coloring problem
  Courant Institue, New York
  J.A. Scott
  Antibandwidth maximization: a map coloring problem
  IBM, Yorktown Heights, New Jersey
  
  
• December 5th
  J.A. Scott
  An introduction to the world of sparse direct solvers
  AT&T, New Jersey
  
  
• October 7th
  J. D. Hogg
  The HSL Mathematical Software Library: Past, present and future (PDF - link opens in a new window)
  NAG Ltd, Oxford, UK
  
  
• September 6th
  J. A. Scott
  An introductory look at the antibandwidth problem (PDF - link opens in a new window)
  Sparse Days 2011, CERFACS, Tolouse, France
  
  
• July 19th
  I. S. Duff
  The use of direct methods in the solution of sparse linear equations for constrained optimization (PDF - link opens in a new window)
  ICIAM 2011, Vancouver, Canada
  
  
• June 29th
  N. I. M. Gould
  Puiseux-based extrapolation for large-scale degenerate quadratic programming (PDF - link opens in a new window)
  24th Biennial Conference on Numerical Analysis, Strathclyde University
  J. D. Hogg
  Experience of Linear Solvers in a Nonlinear Interior Point Method (PDF - link opens in a new window)
  24th Biennial Conference on Numerical Analysis, Strathclyde University
  
  
• June 15th
  J. A. Scott
  The robust and efficient partial factorization of dense symmetric indefinite matrices (PDF - link opens in a new window)
  Householder symposium, Lake Tahoe
  
  
• June 13th
  M. Arioli
  Generalized Golub-Kahan bidiagonalization and stopping criteria (PDF - link opens in a new window)
  Householder symposium, Lake Tahoe
  H. S. Thorne
  Preconditioners for PDE-constrained optimisation problems (PDF - link opens in a new window)
  Householder symposium, Lake Tahoe
  
  
• May 20th
  N. I. M. Gould
  CQP: a fortran 90 module for large-scale convex quadratic programming (PDF - link opens in a new window)
  SIAM Conference on Optimization, Darmsdadt, Germany
  
  
• May 17th
  J. A. Scott
  A novel approach to level-based preconditioners (PDF - link opens in a new window)
  Preconditioning Techniques, Bordeaux
  
  
• April 11th
  M. Arioli
  Linear Regression models and stopping criteria for Krylov methods (PDF - link opens in a new window)
  BAM Conference 2011, Birmingham
  

2010

• December 9th
  M. Arioli
  An introduction to Quantum Graphs theory (PDF - link opens in a new window)
  ENSEEIHT CERFACS, Toulouse
  
  
• November 25th
  N. I. M. Gould
  CQP: a fortran 90 module for large-scale convex quadratic programming (PDF - link opens in a new window)
  OPTEC Workshop on Large Scale QP, Leuven, Belgum
  
  
• November 12th
  H. S. Thorne
  PDE-constrained optimisation: from linear to nonlinear constraints (PDF - link opens in a new window)
  Optimization and Inverse Problems Seminar Series, University of Basel, Switzerland
  
  
• September 16th
  H. S. Thorne
  PDE-constrained optimisation: from linear to nonlinear constraints (PDF - link opens in a new window)
  Optimization, Design and Control Workshop, Oxford, UK
  
  
• September 15th
  H. S. Thorne
  PDE-constrained optimisation: why is it so challenging and some methods to overcome these challenges (PDF - link opens in a new window)
  2nd IMA Conference on Numerical Linear Algebra and Optimisation, Birmingham, UK
  
  
• September 13th
  J. D. Hogg
  The challenge of the solve phase of a multicore solver (PDF - link opens in a new window)
  2nd IMA Conference on Numerical Linear Algebra and Optimisation, Birmingham, UK
  J. A. Scott
  Designing sparse direct solvers for multicore architectures (PDF - link opens in a new window)
  2nd IMA Conference on Numerical Linear Algebra and Optimisation, Birmingham, UK
  
  
• July 20th
  M. Arioli
  An Introduction to Quantum Graphs Theory (PDF - link opens in a new window)
  Daresbury Laboratory, UK
  
  
• July 2nd
  J. D. Hogg
  The challenge of the solve phase of a multicore solver (PDF - link opens in a new window)
  Parallel Matrix Algorithms and Applications 2010, Basel, Switzerland.
  
  
• July 1st
  J. A. Scott
  Designing sparse direct solvers for multicore architectures (PDF - link opens in a new window)
  Parallel Matrix Algorithms and Applications 2010, Basel, Switzerland.
  
  
• June 15th
  M. Arioli
  Generalized Golub-Kahan bidiagonalization and stopping criteria (PDF - link opens in a new window)
  Sparse Days 2010, CERFACS, Toulouse
  J. A. Scott
  The multicore challenge: the sparse indefinite case (PDF - link opens in a new window)
  Sparse Days 2010, CERFACS, Toulouse
  H. S. Thorne
  Challenges from PDE-constrained optimization and some methods to circumvent these issue (PDF - link opens in a new window)
  Scientific Computing Seminar Series, Uppsala University, Sweden
  
  
• April 14th
  H. S. Thorne
  "Challenges from PDE-constrained optimization and some methods to circumvent these issue (PDF - link opens in a new window)"
  ICFD Conference on Numerical Methods for Fluid Dynamics, Reading University.
  
  
• March 18th
  J. A. Scott
  A DAG-based sparse Cholesky solver for multicore architectures (PDF - link opens in a new window)
  Birmingham University, UK
  

2009

• November 2nd
  I. S. Duff
  Exploiting sparsity in the solution phase for large sparse equations (PDF - link opens in a new window)
  Sparse Day @ Berkeley Lab, LBNL, Berkeley, California.
  
  
• October 29th
  I. S. Duff
  Hybrid techniques in the solution of large scale problems (PDF - link opens in a new window)
  SIAM Conference on Applied Linear Algebra 2009, Seaside, Monterey, California.
  
  
• October 29th
  J. A. Scott
  A DAG-based sparse Cholesky solver for multicore architectures (PDF - link opens in a new window)
  CSC Workshop 2009, Seaside, Monterey, California.
  
  
• October 28th
  I. S. Duff
  Development and history of sparse direct methods (PDF - link opens in a new window)
  SIAM Conference on Applied Linear Algebra 2009, Seaside, Monterey, California.
  
  
• October 26th
  J. A. Scott
  The importance of structure in algebraic preconditioners (PDF - link opens in a new window)
  SIAM Conference on Applied Linear Algebra 2009, Seaside, Monterey, California.
  
  
• October 7th
  J. K. Reid
  "Coarrays in Fortran 2008 (PDF - link opens in a new window)"
  PGAS 2009, George Washington University.
  
  
• October 2nd
  M. Arioli
  "An introduction to HSL: Design of reliable software (PDF - link opens in a new window)"
  CSC / NAG Autumn School
  
  
• July 16th
  J. A. Scott
  "Too large to handle directly? (PDF - link opens in a new window)"
  Sparse Matrices for Scientific Computation, Coseners House, Abingdon.
  
  
• July 16th
  J. K. Reid
  "Direct solution of large sparse sets of equations on a multicore computer (PDF - link opens in a new window)"
  Sparse Matrices for Scientific Computation, Coseners House, Abingdon.
  
  
• June 25th
  J. A. Scott
  "Exploiting mixed precision in the solution of sparse symmetric linear systems (PDF - link opens in a new window)"
  23rd Biennial Conference on Numerical Analysis, Strathclyde University.
  
  
• June 24th
  H. S. Dollar
  "Solving trust-region and other regularised subproblems in optimization (PDF - link opens in a new window)"
  23rd Biennial Conference on Numerical Analysis, Strathclyde University.
  
  
• June 24th
  J. K. Reid
  "On Aasen's tridiagonalization method (PDF - link opens in a new window)"
  23rd Biennial Conference on Numerical Analysis, Strathclyde University.
  
  
• June 18th
  M. Arioli
  
  
• "Linear regression and stopping criteria for the conjugate gradient method (PDF - link opens in a new window)"
  Sparse Days at CERFACS 2009.
  
  
• June 18th
  J. A. Scott
  "A DAG-based sparse Cholesky solver for multicore architectures (PDF - link opens in a new window)"
  Sparse Days at CERFACS 2009.
  
  
• April 13th
  H. S. Dollar
  "Projected Krylov methods and PDE-constrained optimization (PDF - link opens in a new window)"
  Advances and Perspectives on Numerical Methods for Saddle Point Problems, Banff International Research Station, Canada.
  
  
• March 31st
  M. Arioli
  "Numerical stability in advance scientific computing (PDF - link opens in a new window)"
  INRIA Sophie Antipolis
  
  
• March 4th
  J. K. Reid
  "Development and maintenance of HSL codes (PDF - link opens in a new window)"
  Workshop on Experiences in Software Development within CSED, Daresbury.
  
  
• February 3rd
  J. K. Reid and J. A. Scott
  "Reducing the Total Bandwidth of a Sparse Unsymmetric Matrix (PDF - link opens in a new window)"
  Dagstuhl Seminar on Combinatorial Scientific Computing.
  
  
• February 3rd
  J. A. Scott
  "Fast AMD orderings for matrices with some dense rows (PDF - link opens in a new window)"
  Dagstuhl Seminar on Combinatorial Scientific Computing.
  

2008

• January 16th
  H. S. Dollar
  "The problem with being dense and how to get around it (PDF - link opens in a new window)"
  CASA Colloquium, Technical University of Eindhoven, The Netherlands.
  
  
• March 31st
  J. A. Scott
  "On the development of out-of-core direct solvers (PDF - link opens in a new window)"
  GAMM 2008, Bremen, Germany.
  
  
• April 8th
  H. S. Dollar
  "The challenges of PDE-constrained optimization (PDF - link opens in a new window)"
  Copper Mountain Conference on Iterative Methods, Colorado.
  
  
• April 17th
  J. A. Scott
  "An introduction to the world of sparse direct solvers and the HSL library (PDF - link opens in a new window)"
  University of Nottingham.
  
  
• May 12th
  H. S. Dollar
  "The challenges of PDE-constrained optimization (PDF - link opens in a new window)"
  SIAM Conference on Optimization, Boston.
  
  
• June 5th
  M. Arioli
  "Matrix square root and interpolation spaces (PDF - link opens in a new window)"
  Householder Symposium XVII, Berlin.
  
  
• June 5th
  J. A. Scott
  "The world of (HSL) sparse direct solvers (PDF - link opens in a new window)"
  Householder Symposium XVII, Berlin.
  
  
• June 5th
  H. S. Dollar
  "Fast AMD orderings for matrices with some dense rows (PDF - link opens in a new window)"
  Householder Symposium XVII, Berlin.
  
  
• June 20th
  M. Arioli
  "Backward stability of FGMRES (PDF - link opens in a new window)"
  Parallel Matrix Algorithms and Applications 2008, Neuchatel
  
  
• June 20th
  J. D. Hogg
  "A Fast Robust Sparse Mixed Precision Solver (PDF - link opens in a new window)"
  Parallel Matrix Algorithms and Applications 2008, Neuchatel
  
  
• June 24th
  M. Arioli
  "Backward stability of FGMRES (PDF - link opens in a new window)"
  Sparse Days 2008, CERFACS
  
  
• June 24th
  M. Arioli
  "Matrix square root and interpolation spaces (PDF - link opens in a new window)"
  Sparse Days 2008, CERFACS
  
  
• June 24th
  J. D. Hogg
  "A Fast Robust Sparse Mixed Precision Solver (PDF - link opens in a new window)"
  Sparse Days 2008, CERFACS
  
  
• July 16th
  H. S. Dollar
  "Symmetric iterative solvers for symmetric saddle-point problems (PDF - link opens in a new window)"
  Computational Linear Algebra for Partial Differential Equations, Durham
  
  
• September 18th
  H. S. Dollar
  "The problem with being dense and how to get around it (PDF - link opens in a new window)"
  Daresbury Laboratory Seminar
  
  
• September 23rd
  M. Arioli
  "Least-squares problems, normal equations, and stopping criteria for the conjugate gradient method (PDF - link opens in a new window)"
  Bath/RAL Day 2008, Bath
  
  
• September 23rd
  J. D. Hogg
  "A Fast Robust Sparse Mixed Precision Solver (PDF - link opens in a new window)"
  Bath/RAL Day 2008, Bath
  
  
• November 5th
  J. K. Reid
  "Parallel programming in Fortran with Coarrays (PDF - link opens in a new window)"
  RAPS Workshop, ECMWF, Reading.
  
  
• November 12th
  J. D. Hogg
  "Mixed Precision Solution of Linear Systems (PDF - link opens in a new window)"
  ERGO Seminar, University of Edinburgh
  
  
• Decemeber 4th
  J. D. Hogg
  "Cholesky factorizations for multicore systems (PDF - link opens in a new window)"
  CMA Seminar, University of Oxford
  
  
• Decemeber 11th
  H. S. Dollar
  "Optimal Solvers for PDE-Constrained Optimization (PDF - link opens in a new window)"
  OPTPDE 2008, Warsaw
  

2007

• February 17th
  I.S. Duff
  "Recent developments in multifrontal methods (PDF - link opens in a new window)"
  Combinatorial Scientific Computing (CSC07), Costa Mesa, California.
  
  
• March 1st
  C. Cartis
  "Some challenges in interior point methods for linear programming (PDF - link opens in a new window)"
  CORMSIS seminar series, University of Southampton, UK.
  
  
• March 28th
  I.S. Duff
  "Recent developments in multifrontal methods (PDF - link opens in a new window)"
  Berkeley Lab Scientific Computing Workshop, LBNL, Berkeley, California.
  
  
• March 28th
  J.A. Scott
  "A virtual memory system for use with an out-of-core solver (PDF - link opens in a new window)"
  Berkeley Lab Scientific Computing Workshop, LBNL, Berkeley, California.
  
  
• March 30th
  I.S. Duff
  "Combining direct and iterative methods for the solution of large systems in different application areas (PDF - link opens in a new window)"
  Stanford50, Stanford University, California.
  
  
• May 11th
  J.A. Scott
  "An introduction to HSL and the solution of sparse linear systems (PDF - link opens in a new window)"
  Department of Mathematics, University of Bath.
  
  
• June 26th
  J.K. Reid
  "Partial Solution of Full Symmetric Indefinite Linear Systems (PDF - link opens in a new window)"
  22nd Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• June 26th
  J.A. Scott
  "The performance of a new HSL out-of-core solver (PDF - link opens in a new window)"
  22nd Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• June 27th
  C. Cartis
  "A new perspective on the complexity of interior point methods for linear programming (PDF - link opens in a new window)"
  22nd Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• June 27th
  N. I. M. Gould
  "Adaptive cubic over-estimation methods for unconstrained optimization (PDF - link opens in a new window)"
  22nd Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• June 28th
  H. S. Dollar
  Iterative solution of saddle-point systems with examples from PDE-constrained optimization (PDF - link opens in a new window)
  22nd Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• June 28th
  M. Arioli
  GMRES preconditioned by a perturbed LDLT decomposition with static pivoting (PDF - link opens in a new window)
  22nd Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• July 11th
  H. S. Dollar
  Iterative solution of saddle-point systems with examples from PDE-constrained optimization (PDF - link opens in a new window)"
  2007 International Conference on Preconditioning Techniques, Toulouse, France.
  
  
• July 16th
  I. S. Duff
  "Developments in matching and scaling algorithms (PDF - link opens in a new window)"
  6th International Congress on Industrial and Applied Mathematics, Zurich, Switzerland.
  
  
• July 16th
  C. Cartis
  "Adaptive cubic overestimation methods for unconstrained optimization (PDF - link opens in a new window)"
  6th International Congress on Industrial and Applied Mathematics, Zurich, Switzerland.
  
  
• July 20th
  H. S. Dollar
  "Iterative linear algebra for constrained optimization (PDF - link opens in a new window)"
  6th International Congress on Industrial and Applied Mathematics, Zurich, Switzerland.
  
  
• July 20th
  H. S. Dollar
  "Iterative solution of saddle-point systems with examples from PDE-constrained optimization (PDF - link opens in a new window)"
  6th International Congress on Industrial and Applied Mathematics, Zurich, Switzerland.
  
  
• August 23rd
  J. A. Scott
  "On the direct solution of very large sparse linear systems using out-of-core techniques (PDF - link opens in a new window)"
  Computational Methods with Applications, Harrachov, Czech Republic.
  
  
• August 24th
  M. Arioli
  GMRES preconditioned by a perturbed LDLT decomposition with static pivoting (PDF - link opens in a new window)
  Computational Methods with Applications, Harrachov, Czech Republic.
  
  
• September 13th
  H. S. Dollar
  "Iterative solution of saddle-point systems with examples from PDE-constrained optimization (PDF - link opens in a new window)"
  First IMA Conference on Numerical Linear Algebra and Optimisation, Birmingham.
  
  
• September 14th
  J. K. Reid and J. A. Scott
  "Partial Solution of Full Symmetric Indefinite Linear Systems (PDF - link opens in a new window)"
  First IMA Conference on Numerical Linear Algebra and Optimisation, Birmingham.
  
  
• September 14th
  M. Arioli
  GMRES preconditioned by a perturbed LDLT decomposition with static pivoting (PDF - link opens in a new window)
  First IMA Conference on Numerical Linear Algebra and Optimization, Birmingham.
  
  
• September 14th
  J. A. Scott
  "Solving large sparse linear systems out of core (PDF - link opens in a new window)"
  First IMA Conference on Numerical Linear Algebra and Optimisation, Birmingham.
  
  
• September 25th
  J. A. Scott
  "Solving large sparse linear systems out of core (PDF - link opens in a new window)"
  Bath-RAL Numerical Analysis Day, Rutherford Appleton Laboratory, England.
  
  
• September 25th
  H. S. Dollar
  "Iterative solution of PDE-constrained optimization problems (PDF - link opens in a new window)"
  Bath-RAL Numerical Analysis Day, Rutherford Appleton Laboratory, England.
  
  
• October 26th
  H. S. Dollar
  "Iterative solution of PDE-constrained optimization problems (PDF - link opens in a new window)"
  Numerical Analysis and Scientific Computing Seminars, University of Manchester, England.
  

2006

• January 9-13th
  N. I. M. Gould
  Slides and lecture notes (link opens in a new window)
  University of Edinburgh Operations Research MSc course on Numerical Optimization.
  
  
• January-March
  N. I. M. Gould
  Slides and lecture notes (link opens in a new window)
  Oxford University Part C course on Continuous Optimization.
  
  
• June 15th
  N. I. M. Gould
  "Finding a well-centred point for a set of polyhedral constraints (PDF - link opens in a new window)"
  Sparse Days, CERFACS, Toulouse, France.
  
  
• June 16th
  H. S. Dollar
  "Implicit-factorization constraint preconditioners and permutations (PDF - link opens in a new window)"
  Sparse Days, CERFACS, Toulouse, France.
  
  
• June 16th
  M. Arioli
  "A note on GMRES preconditioned by a perturbed LDLT decomposition with static pivoting (PDF - link opens in a new window)"
  Sparse Days, CERFACS, Toulouse, France.
  
  
• June 20th
  J. A. Scott
  "The design of an out-of-core multifrontal solver for the 21st century (PDF - link opens in a new window)"
  PARA'06, Umea, Sweden.
  
  
• July 24th
  J. A. Scott
  "Refinement algorithms for bandwidth reduction (PDF - link opens in a new window)"
  GAMM-SIAM Conference on Applied Linear Algebra, Dusseldorf, Germany.
  
  
• July 25th
  M. Arioli
  "Stopping criteria in the context of finite-element discretization (PDF - link opens in a new window)"
  GAMM-SIAM Conference on Applied Linear Algebra, Dusseldorf, Germany.
  
  
• July 25th
  H. S. Dollar
  "Constraint style preconditioners for regularized saddle point problems (PDF - link opens in a new window)"
  GAMM-SIAM Conference on Applied Linear Algebra, Dusseldorf, Germany.
  
  
• August 1st
  C. Cartis
  "A new perspective on the complexity of interior point methods for linear programming (PDF - link opens in a new window)"
  International Symposium on Mathematical Programming, Rio de Janeiro, Brazil
  
  
• September 5th
  M. Arioli
  "Stopping criteria for Krylov methods and finite-element approximation of variational problems (PDF - link opens in a new window)"
  ECCOMAS CFD 2006 September 5-8, 2006 Egmond aan Zee, The Netherlands.
  
  
• September 26th
  C. Cartis
  "Finding a well-centred point within a polyhedron (PDF - link opens in a new window)"
  International Conference on Numerical Analysis and Optimization, Beijing, China
  
  
• September 27th
  N. I. M. Gould
  "SRLP-EQP filter methods for constrained optimization (PDF - link opens in a new window)"
  International Conference on Numerical Analysis and Optimization, Beijing, China
  
  
• November 2nd
  J. A. Scott
  "HSL and its out-of-core solver (PDF - link opens in a new window)"
  Institute of Computer Science, Academy of Sciences of the Czech Republic.
  
  
• November 15th
  H. S. Dollar
  "Iterative linear algebra for constrained optimization (PDF - link opens in a new window)"
  ERGO Seminar, University of Edinburgh, Scotland.
  
  
• November 9th
  M. Arioli
  "The role of finite dimensional Hilbert spaces and their duals in the design of Krylov subspaces methods (PDF - link opens in a new window)"
  Applied Mathematics Dep., University of Leicester.
  
  
• December 5th
  H. S. Dollar
  "Solving saddle-point problems at a gallop (PDF - link opens in a new window)"
  Second Internal Numerical Analysis Conference, University of Oxford.
  

2005

• January 17-20th
  N. I. M. Gould
  Slides and lecture notes (link opens in a new window)
  University of Edinburgh Operations Research MSc course on Numerical Optimization.
  
  
• January 21st
  J.A. Scott
  "HSL and the solution of sparse linear systems (PDF - link opens in a new window)"
  EPCC, The University of Edinburgh, Scotland.
  
  
• January 21st
  J.A. Scott
  "Which sparse direct solver? (PDF - link opens in a new window)"
  The University of Edinburgh, Scotland.
  
  
• January-February
  N. I. M. Gould
  Slides and lecture notes (link opens in a new window)
  Oxford University MSc course on Numerical Optimization.
  
  
• February 3rd
  J.A. Scott
  "HSL and parallel sparse direct solvers"
  University of Basel, Switzerland.
  
  
• February 17th
  N. I. M. Gould
  "To SQP or not to SQP - modern alternatives in large-scale nonlinear optimization"
  Oxford University Computing Laboratory, England.
  
  
• May 17th
  N. I. M. Gould
  "Useful linear algebra for large-scale nonlinear optimization"
  SIAM Conference on Optimization, Stockholm, Sweden
  
  
• May 23rd
  M. Arioli
  "Block partitioned matrices, inf-sup conditions, and stopping criteria (PDF - link opens in a new window)"
  Householder Symposium XVI, Seven Springs Mountain Resort, Pennsylvania, USA.
  
  
• May 24th
  J. A. Scott
  "On solving large sparse linear systems out-of-core"
  Householder Symposium XVI, Seven Springs Mountain Resort, Pennsylvania, USA.
  
  
• June 21st
  J. A. Scott
  "Reducing the total bandwidth of a sparse unsymmetric matrix"
  Second International Workshop on Combinatorial Scientific Computing, CERFACS, Toulouse, France.
  
  
• June 27th
  J. A. Scott
  "On solving large sparse linear systems out-of-core"
  21st Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• June 29th
  N. I. M. Gould
  "Finding a well-centred point for a set of convex polyhedral constraints"
  21st Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• June 29th
  M. Arioli
  "Stopping criteria for Krylov methods applied to the solution of mixed finite-element problems (PDF - link opens in a new window)"
  21st Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• August 16th
  N. I. M. Gould
  "Finding a well-centred point within a polyhedron"
  Optbridge 2005, Cambridge University, England.
  
  
• September 27th
  N. I. M. Gould
  "SRLP-EQP filter methods for constrained optimization"
  4th Bath-RAL Numerical Analysis Day, Rutherford Appleton Laboratory, England.
  
  
• September 27th
  J. K. Reid
  "Reducing the Total Bandwidth of a Sparse Unsymmetric Matrix (PDF - link opens in a new window)"
  4th Bath-RAL Numerical Analysis Day, Rutherford Appleton Laboratory, England.
  
  
• October 3rd
  N. I. M. Gould
  "Optimization - a brief overview"
  Mathematical Interdisciplinary Research Day on Optimization, University of Warwick, England.
  
  
• October 12th
  N. I. M. Gould
  "The (ir)resistible rise of sequential quadratic programming methods for nonlinear optimization"
  University of Manchester, England.
  
  
• November 3rd
  J. K. Reid
  "Solving large sparse symmetric linear systems out of core (PDF - link opens in a new window)"
  Oxford University Computing Laboratory, England.
  
  
• November 18th
  N. I. M. Gould
  "Requirements for automatic differentiation in numerical optimization" (PostScript, PDF (PDF - link opens in a new window))
  2nd European Workshop on Automatic Differentiation, Cranfield University at Shrivenham, England.
  

2004

• February 6th-27th
  M. Arioli
  " The role of backward stability and dual spaces in the design of iterative methods (PDF - link opens in a new window)"
  Lectures of the Course on Iterative Methods, ENSEEIHT, Toulouse, France.
  
  
• February 25th
  J.A. Scott
  "Bordered block diagonal forms for parallel sparse direct solvers"
  SIAM Conference on Parallal Processing for Scientific Computing.
  
  
• February 25th
  N. I. M. Gould
  "An interior-point l1-penalty method for nonlinear optimization"
  Judge Institute of Management, University of Cambridge, England
  
  
• March 26th
  N. I. M. Gould
  "A filter-trust-region method for unconstrained optimization"
  GAMM 75th annual meeting, Dresden, Germany
  
  
• March 29th
  N. I. M. Gould
  "An interior-point l1-penalty method for nonlinear optimization"
  European Conference on Computational Optimization, Dresden, Germany
  
  
• April 14th
  N. I. M. Gould
  "An interior-point l1-penalty method for nonlinear optimization"
  University of Edinburgh, Scotland.
  
  
• April 15th-21st
  N. I. M. Gould
  Slides and lecture notes (link opens in a new window)
  University of Edinburgh Operations Research MSc course on Numerical Optimization.
  
  
• May 3rd-14th
  M. Arioli
  "Problemi di stabilita' numerica nel calcolo scientifico avanzato (PDF - link opens in a new window)"
  University of Udine, course on Stability in Advanced Scientific Computing.
  
  
• May 13th
  N. I. M. Gould
  "An interior-point l1-penalty method for nonlinear optimization"
  Workshop on Large Scale Nonlinear and Semidefinite Programming, University of Waterloo, Ontario, Canada.
  
  
• May 26th
  M. Arioli
  "Chebyshev-based two-stage iterative method as an alternative to the direct solution of linear systems (PDF - link opens in a new window)"
  Iterative methods, preconditioning and numerical PDE's (IMET 2004), Prague, Czech Republic.
  
  
• June 3rd
  J.A. Scott
  "A numerical evaluation of sparse solvers for the direct solution of large sparse symmetric linear systems (PDF - link opens in a new window)"
  CERFACS Sparse Days Meeting, June 2004
  
  
• June 28th
  N. I. M. Gould
  "Constraint preconditioners for large-scale nonlinear optimization"
  Workshop on "Large-scale Nonlinear Optimization", Erice, Sicily, Italy.
  
  
• August 13th
  N. I. M. Gould
  "Nonlinear scaling for bound-constrained optimization"
  Optbridge 2004, Oxford University, England.
  
  
• September 7th
  N. I. M. Gould
  "Constraint preconditioners for large-scale nonlinear optimization"
  Mathematics and Computational Science Division, Argonne National Laboratory, Illinois, USA.
  
  
• October 1st
  J. A. Scott
  "Which sparse direct symmetric solver? (PDF - link opens in a new window)"
  Bath-RAL Numerical Analysis Day, University of Bath, England.
  
  
• October 1st
  M. Arioli
  "A Chebyshev-based two-stage iterative method as an alternative to the direct solution of linear systems (PDF - link opens in a new window)"
  Bath-RAL Numerical Analysis Day, University of Bath, England.
  
  
• October 13th
  M. Arioli
  "Problemi di accuratezza relativi alla soluzione di sistemi sottodeterminati (PDF - link opens in a new window)"
  Invited talk in honour of A. Laratta, University of Modena.
  
  
• December 7th
  J.A. Scott
  "Which sparse direct solver? (PDF - link opens in a new window)"
  Department of Mathematics, The University of British Columbia, Vancouver, Canada.
  

2003

• January 11th
  N. I. M. Gould
  "SQP, SLP and Interior-Point methods for large-scale nonlinear programming"
  IMA Workshop on Optimization in Simulation-Based Models, Minneapolis, Minnesota, USA.
  
  
• January-February
  N. I. M. Gould
  Slides and lecture notes (link opens in a new window)
  Oxford University MSc course on Numerical Optimization.
  
  
• April
  N. I. M. Gould
  Slides and lecture notes (link opens in a new window)
  University of Edinburgh Operations Research MSc course on Numerical Optimization.
  
  
• June
  J. A. Scott
  "A numerical evaluation of HSL packages for the direct solution of large sparse symmetric linear systems"
  Poster for Sparse Days at St Girons, France and talk at 20th Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• June 25th
  N. I. M. Gould
  "An interior-point l1-penalty method for nonlinear optimization (PDF - link opens in a new window)"
  20th Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• June 25th
  M. Arioli
  "Backward error analysis and stopping criteria for Krylov space method (PDF - link opens in a new window)"
  20th Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• September 24th
  M. Arioli
  "Backward error analysis and stopping criteria for Krylov space method (PDF - link opens in a new window)"
  Numerical Linear Algebra and its Applications Workshop, Monopoli, Bari, Italy.
  

2002

• January 15th
  I. S. Duff
  " Numerical Linear Algebra, Sparse Matrices, and Parallel Algorithms: Introduction"
  Summer School, ANU Canberra.
  
  
• January 15th
  I. S. Duff
  "Numerical Linear Algebra, Sparse Matrices, and Parallel Algorithms: Frontal methods"
  Summer School, ANU Canberra.
  
  
• January 16th
  I. S. Duff
  "Numerical Linear Algebra, Sparse Matrices, and Parallel Algorithms: Multifrontal Methods"
  Summer School, ANU Canberra.
  
  
• January 16th
  I. S. Duff
  "Numerical Linear Algebra, Sparse Matrices, and Parallel Algorithms: Multifrontal Methods ... distributed memory implementation"
  Summer School, ANU Canberra.
  
  
• January 24th
  N. I. M. Gould
  "The state-of-the-art in numerical methods for quadratic programming"
  GAMS Seminar, Leipzig, Germany.
  
  
• May 3rd
  N. I. M. Gould
  "Numerical methods for quadratic programming"
  University of Essex, England.
  
  
• May 20th
  N. I. M. Gould
  "The GALAHAD software library for large-scale nonlinear optimization"
  SIAM Conference on Optimization, Toronto, Canada
  
  
• June 20th
  J. A. Scott
  "A parallel direct solver for large sparse unsymmetric linear systems"
  Householder Symposium XV, Peebles, Scotland.
  
  
• July 15-19th
  N. I. M. Gould
  "5 lectures on nonlinear optimization"
  10th EPSRC Numerical Analysis Summer School, Durham, England.
  
  
• August 6th
  J. A. Scott
  "HSL parallel direct solvers for large sparse linear systems"
  Computational Linear Algebra with Applications, Milovy, Czech Republic.
  
  
• August 6th
  M. Arioli
  "A Null-Space Method Approach in Solving Darcy's Equations (PDF - link opens in a new window)"
  Computational Linear Algebra with Applications, Milovy, Czech Republic.
  
  
• October 14th
  N. I. M. Gould
  "How large is "large" for nonlinear programming?"
  University of Edinburgh, Scotland.
  
  
• October 30th
  J. A. Scott
  "HSL and a new parallel sparse direct solver"
  AspenWorld 2002, Washington D.C.
  
  
• November 4th
  N. I. M. Gould
  "Sequential linear programming for huge optimization problems"
  Bath-RAL Numerical Analysis Day, University of Bath, England.
  
  
• November 4th
  J. A. Scott
  "HSL parallel direct solvers for large sparse linear systems"
  Bath-RAL Numerical Analysis Day, University of Bath, England.
  
  
• November 8th
  I. S. Duff
  "Direct methods for sparse matrices"
  Tutorial in Neuchatel, Switzerland.
  
  
• November 20th
  J. A. Scott
  "HSL and the solution of sparse systems"
  Seminar at the University of Kingston, London.
  

2001

• January 22nd
  N. I. M. Gould
  " The state-of-the-art in numerical methods for quadratic programming"
  1st International Conference on Industrial and Applied Mathematics in Indian Subcontinent, Amritsar, India.
  
  
• May-June
  N. I. M. Gould
  Slides and lecture notes (link opens in a new window)
  Oxford University MSc course on Numerical Optimization.
  
  
• June 13th
  J. A. Scott
  "A multilevel algorithm for wavefront reduction"
  Sparse Days at CERFACS, Toulouse, France.
  
  
• June 28th
  N. I. M. Gould
  "The state-of-the-art in numerical methods for quadratic programming"
  19th Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• June 28th
  J. A. Scott
  "A multilevel algorithm for wavefront reduction"
  19th Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• October 16th
  I. S. Duff
  "Techniques, algorithms, and software for the direct solution of large sparse linear systems (Powerpoint presentation - link opens in a new window)"
  Powerpoint file
  Graduate Lecture Notes, Oxford University.
  
  
• October 19th
  J. A. Scott
  "Frontal methods"
  Graduate Lecture Notes, Oxford University.
  
  
• October 23rd
  I. S. Duff
  "Techniques, algorithms, and software for the direct solution of large sparse linear systems .. Multifrontal methods"
  Graduate Lecture Notes, Oxford University.
  
  
• October 26th
  I. S. Duff
  "Techniques, algorithms, and software for the direct solution of large sparse linear systems .. MUMPS and comments on parallel software"
  Graduate Lecture Notes, Oxford University.
  
  
• October 26th
  J. A. Scott
  "Parallel direct methods"
  Graduate Lecture Notes, Oxford University.
  
  
• December 11th
  N. I. M. Gould
  "GALAHAD - a library of packages for large-scale nonlinear optimization"
  ICFD Workshop on Optimisation, Oxford University.
  

2000

• February 3rd
  N. I. M. Gould
  " Quadratic programming: theory and methods"
  3rd FNRS Cycle in Mathematical Programming, Han-sur-Lesse, Belgium.
  
  
• June 25th
  N. I. M. Gould
  "Componentwise fast convergence of parameterized Newton methods"
  University of Edinburgh, Scotland.
  
  
• August 10th
  N. I. M. Gould
  "The development of GALAHAD, a new algorithm for large-scale nonlinear programming II: Quadratic Programming subproblems"
  17th International Symposium on Mathematical Programming, Atlanta, Georgia, USA.
  
  
• October 24th
  N. I. M. Gould
  "Optimization on the cusp of the 21st century: what can we learn from quadratic programming?"
  Daresbury Laboratory, England.
  

1999

• June 15th
  K. A. Y. Meerbergen
  " The solution of quadratic eigenvalue problems"
  Householder Symposium XIV, Whistler, British Columbia, Canada.
  
  
• June 15th
  Jennifer Scott
  " Row ordering for frontal solvers"
  Householder Symposium XIV, Whistler, British Columbia, Canada.
  
  
• July 1st
  N. I. M. Gould
  "An iterative active-set method for large-scale non-convex quadratic programming"
  18th Biennial Conference on Numerical Analysis, Dundee, Scotland.
  
  
• July 16th
  N. I. M. Gould
  "SQP methods for large-scale nonlinear programming"
  19th IFIP TC7 Conference on System Modelling and Optimization, Cambridge, England.
  
  
• October 18th
  K. A. Y. Meerbergen
  "The rational Lanczos method for the Hermitian eigenvalue problem"
  Warwick, England.
  
  
• October 28th
  N. I. M. Gould
  "Numerical methods for large-scale non-convex quadratic programming"
  1st Workshop on Nonlinear Optimization: ``Interior-Point and Filter Methods'', Coimbra, Portugal.
  

1998

• July 1st
  N. I. M. Gould
  " Conjugate gradient methods for linearly-constrained and structurally ill-conditioned unconstrained optimization problems"
  Workshop on "Nonlinear Optimization and Applications", Erice, Sicily, Italy.
  
  
• July 6th
  K. A. Y. Meerbergen
  "Reliable eigenvalue solvers for generalized eigenvalue problems: implicit restart and domain of confidence"
  Eighth EPSRC Summer School, Leicester, England.