Cerfacs Enter the world of high performance ...





  • J. B. LATRE: Hypercomplex algebras for Computation. PhD Thesis. Université de Toulouse – Ecole Doctorale : MITT. 18 February 2019.
    • Jury: F. Chatelin, M. Arioli, S. Petiton, B. Alziarychassat, Ph. Ricoux


  • T. VANDAMMESimulation-inversion des diagraphies. Ph.D. dissertation, 12 november 2018.
    • Jury : S. Gratton, M-L. Doan, L. Debreu, F. Henry, G. Debenest, J. Monnier, E. Caroli






  • P. SALAS : Physical and numerical aspects of thermoacoustic instabilities in annular combustion chambers. Ph.D. dissertation,  May 2015. vidéo





















  • M. AhmadnasabHomotopic Deviation theory: A qualitative study. Ph.D. dissertation, Université Toulouse 1, October 2007.
    • Jury: J. Fleckinger, M. B. van Gijzen, S. Gaubert, F. Chaitin-Chatelin, I.S. Duff, J. Giacomoni, E. Traviesas-Cassan, J.-C. Yakoubsohn









  • C. Vömel: Contributions to research in high performance scientific computing for sparse matrices. Ph.D. dissertation, INPT, March 2003. TH/PA/03/26
    • Keywords: High performance computing, sparse linear systems, MUMPS, multifrontal Gaussian elimination, distributed memory code, dynamic task scheduling, sparse data structures, programming standard, Sparse BLAS, reference implementation, matrix norm, condition number, incremental estimators
    • Jury: E. Ng, J. Roman, P. Amestoy, M. Arioli, I. S. Duff, and A. Pothen


  • J. Langou: Iterative methods for solving linear systems with multiple right hand sides. Ph.D. dissertation, INSA Toulouse, June 2003. TH/PA/03/24
    • Keywords: linear systems, Krylov methods, GMRES, multiple right-hand sides, Gram-Schmidt orthogonalization, modern scientific software, parallel distributed computers, scientific computing, large scale numerical simulation in electromagnetism
    • Jury: G. Alléon, A. Bjorck, I.S. Duff, L. Giraud, G. Meurant, C.C. Paige, and Y. Saad






  • D. Orban: Méthodes de points intérieurs pour l’optimisation non-linéaire. Ph.D. Thesis, FUNDP/INPT, May 2001. TH/PA/01/09
    • Keywords: Smooth nonlinear optimization, interior-point methods, speed of convergence, degenerate problems, testing environment
    • Jury: Ph. L. Toint, M. Daydé, A. Sartenaer, I. S. Duff, J. Noailles, S. J. Wright, and J. Henrard



  • A. N. Zaoui: Deux Contributions au Calcul Scientifique I-Sur la convergence de la méthode des Itérations Simultanées couplée à l’algorithme d’Arnoldi itératif II-Autour du Calcul Hypercomplexe. Ph.D. dissertation, Université Toulouse I, December 2000. TH/PA/00/78


  • A. Bouras: Contrôle de convergence des solveurs emboités pour le calcul de valeurs propres avec inversion. Ph.D. dissertation, Université Toulouse I, Septembre 2000. TH/PA/00/77
    • Jury: J. Flckinger, M. Ahuès (rapporteur), P. Spitéri (rapporteur), F. Chaitin-Chatelin, and R. Beauwens ans J.-C. Bergès


  • E. Traviesas: Sur le déploiement du champ spectral d’une matrice. Ph.D. dissertation, Université Toulouse I, May 2000. TH/PA/00/30
    • Keywords: Normwise and Homotopic perturbations, backward error and pseudospectrum, Arnoldi and GMRES methods, eigenvalue problem and linear system
    • Jury: J. Fléckinger, P. Charrier (rapporteur), F. Dias D’almeida (rapporteur), F. Chaitin-Chatelin, I. S. Duff, A. Ilahi, and B. N. Parlett



  • A. Ilahi: Validation du calcul sur ordinateur: application de la théorie des singularités algébriques. Ph.D. dissertation, Université Toulouse I, June 1998. TH/PA/98/31
  • S. Gratton: Outils théoriques d’analyse du calcul à précision finie. Ph.D. dissertation, Institut National Polytechnique de Toulouse, June 1998. TH/PA/98/30
  • A. Harrabi: Pseudospectres d’opérateurs intégraux et différentiels. Application à la Physique mathématique. Ph.D. dissertation, Université Toulouse I, May 1998. TH/PA/98/29





  • V. Toumazou: Portraits spectraux de matrices : un outil d’analyse de la stabilité. PhD thesis, Université Henri Poincaré, Nancy I, 1996. TH/PA/96/46
    • Jury: M. Lalanne, F. Chaitin-Chatelin (rapporteur), B. Philippe (rapporteur), J.-C. Dunyach, V. Frayssé, N. Higham, and M. Gueury





  • T. Braconnier: Sur le calcul de valeurs propres en précision finie. Ph. D. dissertation, Université R. Poincaré, Nancy I, May 1994. TH/PA/94/24



  • C. Puglisi: QR factorization of large sparse overdetermined and square matrices using the multifrontal method in a multiprocessor environment. PhD thesis, CERFACS, Toulouse, France, 1993. TH/PA/93/33
    • Jury: M. Arioli, ø A. Bjorck, M.J. Daydé, I.S. Duff, J. Noailles, and B. Philippe


  • S. Godet-Thobie: Valeurs propres de matrices fortement non normales en grande dimension. PhD thesis, CERFACS, Toulouse, France, 1993. TH/PA/93/06



  • V. Frayssé: Sur la fiabilité des calculs sur ordinateur. PhD thesis, CERFACS, Toulouse, France, 1992. TH/PA/92/11
  • D. Ruiz: Solution of large sparse unsymmetric linear systems with a block iterative method in a multiprocessor environment. PhD thesis, CERFACS, Toulouse, France, 1992. TH/PA/92/06



  • Y.-H. De Roeck: Résolution sur ordinateurs multi-processeurs de problèmes d’élasticité par décomposition de domaines. PhD thesis, CERFACS, Toulouse, France, 1991. TH/PA/91/04
  • P. R. Amestoy: Factorisation de grandes matrices creuses non symétriques basée sur une méthode multifrontale dans un environnement multiprocesseur. PhD thesis, CERFACS, Toulouse, France, 1991. TH/PA/91/03


Young PhD day (JDD) – Thursday 8 October 2020

Brigitte Yzel |  24 September 2020

  Ph.D. Students' Day (JDD 2020) Thursday 8 October 2020 Virtual event open to our partners and associates   Planning   The 2020 edition of the PhD Students' Day will take place on October 8th, 2020. This year, this day of the PhD students of the Cerfacs, will take place mainly in visio in order to respect all the health safety measures relating to Covid-19. This day will be held in a virtual way through oral presentations filmed and broadcast on a private link, which we will distribute to all participants. Everyone will thus be able to discover at a distance the subjects developed by the doctoral students. At the same time, the "Posters session" will be opened on the morning of the JDD, by sending all the posters in pdf format by e-mail to all the participants for consultation, and by opening the "50-minute question session" on a channel whose links we will send you. This will allow participants to ask questions about the posters of the session. Finally, we have included in this 5th edition a great novelty, by allowing several students to present their subject in the popularised form of "My thesis in 3 minutes", guided by Matthieu Pouget, actor and theatre director. This day will end with the vote for the "Best poster" and the "Best presentation of My thesis in 3 minutes". Participation in the event is free of charge. However, for logistical reasons, registration, only by invitation, is mandatory.   Organising Committee:  Scientific committee  Nicolas Venkovic Victor Xing Inscription &  information Jade Schweiger Brigitte Yzel  Read more

Sparse Days 2020, Cerfacs

Brigitte Yzel |  24 September 2020

Sparse Days Meeting 2020  23 - 24 November 2020 Virtual Workshop   The annual Sparse Days meeting will be held this year as a virtual event, on 23 - 24 November 2020. Sadly, because of the pandemic, we will not be able to have a normal face-to-face Sparse Days at Cerfacs this year. We will be holding an online version from 3pm to 7pm on 23 and 24 November. The timing is chosen to accommodate participants from North America since, at normal Sparse Days, we have a good representation from there. A registration form  is available on this conference website where you can also submit a title and an abstract for any proposed talk. We will probably be using the Webex system and will post details about how to connect to all people who register.Read more