Patrick R. Amestoy Professeur Informatique et Mathématiques Appliquées Université de Toulouse INPT-ENSEEIHT-IRIT (UMR CNRS 5505) 2 rue Charles-Camichel, F-31071 Toulouse cedex 7, France Tél: (33) 5 34322207 Fax : (33) 5 34322157, amestoy_at_enseeiht.fr

Enseignement / Teaching

Responsable du groupe Algorithmes Parallèles et Optimisation (APO)
/ head of the Parallel Algorithms and Optimization Group

Activités de recherche / Research activities

• Algèbre linéaire / Linear Algebra
• Factorisation des matrices creuses / Sparse matrix factorization
• Réordonnancement des matrices creuses / Reordering sparse matrices
• Calcul distribué / Distributed computing

Projets et logiciels / Projects and software

• MUMPS/ MUMPS : MUltifrontal Massively Parallel Solvers for symmetric and unsymmetric complex/real sparse matrices



• New relase May 2011 MUMPS 4.10.0
• User's guide MUMPS 4.10.0 ( postscript / pdf formats)
• Authors and Related publications

• GRID-TLSE (2002-) :

  • Projet initialement (2002-2005) financé par les programmes ACI-GRID du ministère de la recherche.
    
  • L'activité autour de ce projet se poursuit dans le cadre des projets LEGO (ANR-CISG05-11)et SOLSTICE (ANR-06-CIS6-010) financés par l'ANR et labellisé par le pôle de compétitivité A.E.S.E (Aerospace Vallée)-20057123.

• European Exascale Software Initiative (EESI):  (2011-2012 and 2013-). Member of Working group (WG 4.3) on Numerical libraries, Solvers and Algorithms.

• Collaborator within consortium SEISCOPE: Wave propagation and seismic imaging

• CIMI Centre International de Mathématiques et Informatique de Toulouse (CIMI), ANR LabEx "Investissement d'avenir" programs

• MA41uns / MA49 :

  • Shared memory parallel LU / QR factorization for sparse matrices
    Specification sheets: LU factorization (Real, Complex), QR factorization MA41 spec. sheets,
  • Software availability :
    Harwell Sub. Library and a free licence for non-commercial use of a research version of the codes can be obtained on request (mention your references (name, institution, address), and describe your project).
    The LU factorization based on work done with Chiara Puglisi ENSEEIHT-IRIT RT-APO-00-3, revised version appeared in SIAM Journal on Matrix Analysis and Applications, V24, No 2, pp. 553-569 (2002) is also available on request.

• AMD : Approximated Minimum Degree, MC47 in HSL Lib. Release 12 . Related AMD variants (not AMD itself, however) are available for non-commercial use in NETLIB

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Publications récentes / Recent publications (See also publication list at IRIT, and publication list of the Parallel Algorithm and Optimization team.)

• [2009] F. Sourbier, S. Operto, J. Virieux, P.R. Amestoy, J.-Y. L'Excellent, {FWT2D}: a massively parallel program for frequency-domain Full-Waveform Tomography of wide-aperture seismic data -- Part 1: Algorithm, Computers and Geosciences (2009), doi:10.1016/j.cageo.2008.04.013.

• [2009] F. Sourbier, S. Operto, J. Virieux, P.R. Amestoy, J.-Y. L'Excellent, {FWT2D}: a massively parallel program for frequency-domain Full-Waveform Tomography of wide-aperture seismic data -- Part 2: Numerical examples and scalability analysis Computers and Geosciences (2009), doi:10.1016/j.cageo.2008.04.012

• [2010] Keynote speaker at the Thirty-fifth Woudschoten Conference on Parallel numerical linear algebra, (6-8 October 2010), Zeist (The Netherlands) .

• [2011] P. Amestoy, I.S. Duff, Y. Robert, F.H. Rouet and B. Ucar, On computing inverse entries of a sparse matrix in an out-of-core environment, IRIT technical report RT-APO-10-06, also appeared as INRIA-LIP and CERFACS Technical Report, modified version accepted to SIAM journal on Scientific Computing (2012).

• [2012] P. Amestoy, C. Ashcraft, O. Boiteau, A. Buttari, J.-Y. L'Excellent and C. Weisbecker, Improving multifrontal methods by means of block low-rank representations, INPT-IRIT Technical Report RT/APO/12/6, also appeared as INRIA/RR-8199.

Last update : Fev. 2013