Luc Giraud

133
Documents

Publications

Publications

A journey through some numerical linear algebra algorithms with variable accuracy storage

Luc Giraud , Emmanuel Agullo , Olivier Coulaud , Martina Iannacito , Mohammad Issa et al.
CAS-ANLA 2025 - The Chinese Academy of Sciences Workshop on Approximate computing in Numerical Linear Algebra, Apr 2025, Beijing, China
Communication dans un congrès hal-05049142 v1

A journey on subspace methods for the solution of sequences of linear systems

Luc Giraud , Emmanuel Agullo , Olivier Coulaud , Martina Iannacito , Gilles Marait et al.
International conference on Mathematics and decision 2024, Mohammed VI Polytechnic University, Dec 2024, Rabat, Morocco
Communication dans un congrès hal-04854993 v1
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GMRES in variable accuracy: a case study in low rank tensor linear systems

Martina Iannacito , Emmanuel Agullo , Olivier Coulaud , Luc Giraud , Gilles Marait et al.
GAMM - Workshop on Applied and Numerical Linear Algebra 2022, Erin Carson; Iveta Hnětynková; Stefano Pozza; Petr Tichý; Miroslav Tůma, Sep 2022, Prague, Czech Republic
Communication dans un congrès hal-03826879 v2

Numerical Analysis of the Maximal Attainable Accuracy in Communication-hiding Pipelined Conjugate Gradients

Siegfried Cools , Jeffrey Cornelis , Emmanuel Agullo , Emrullah Fatih-Yetkin , Luc Giraud et al.
CSE19 - SIAM Conference on Computational Science and Engineering, Feb 2019, Spokane, United States
Communication dans un congrès hal-02073711 v1

On Soft Errors in the Conjugate Gradient: Sensitivity and Robust Numerical Detection

Emmanuel Agullo , Siegfried Cools , Luc Giraud , Emrullah Fatih-Yetkin , Wim Vanroose
CSE19 - SIAM Conference on Computational Science and Engineering, Feb 2019, Spokane, United States
Communication dans un congrès hal-02073742 v1
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Energy Analysis of a Solver Stack for Frequency-Domain Electromagnetics

Emmanuel Agullo , Luc Giraud , Stephane Lanteri , Gilles Marait , Anne-Cécile Orgerie et al.
PDP 2019 - 27th Euromicro International Conference on Parallel, Distributed and Network-Based Processing, Feb 2019, Pavia, Italy. pp.385-391, ⟨10.1109/EMPDP.2019.8671555⟩
Communication dans un congrès hal-02191331 v1
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Hierarchical Symbolic Factorization for Sparse Matrices

Aurélien Falco , Emmanuel Agullo , Luc Giraud , Guillaume Sylvand
Sparse Days 2018, Sep 2018, Toulouse, France
Communication dans un congrès hal-01999895 v1

Soft Error in PCG: Sensitivity, Numerical Detections and Possible Recoveries

Emmanuel Agullo , Luc Giraud , Emrullah Fatih Yetkin
SIAM Conference on Computational Science and Engineering, CSE'17, Feb 2017, Atlanta, United States
Communication dans un congrès hal-01670189 v1

Robust coarse spaces for abstract Schwarz preconditioners via generalized eigenproblems

Emmanuel Agullo , Luc Giraud , Louis Poirel
International conference on domain decomposition methods, DD24, Feb 2017, Svalbard, Norway
Communication dans un congrès hal-01670178 v1

Soft Error in Classical PCG and its Variants: Sensitivity, Numerical Detections and Possible Recovery Policies

Emmanuel Agullo , Siegfried Cools , Luc Giraud , Wim Vanroose , Emrullah Fatih Yetkin
SIAM Annual meeting 2017, AN'17, Jul 2017, Pittsburgh, United States
Communication dans un congrès hal-01670198 v1

Two New Block Krylov Methods for Linear Systems with Multiple Right-hand Sides

Yan-Fei Jing , Emmanuel Agullo , Bruno Carpentieri , Luc Giraud , Ting-Zhu Huang
IMA Conference on Numerical Linear Algebra and Optimization, Sep 2016, Birmingham, United Kingdom
Communication dans un congrès hal-01334648 v1

Coarse Grid Correction for Algebraic Domain Decomposition Solvers

Louis Poirel , Emmanuel Agullo , Luc Giraud
ECCOMAS Congress 2016, Jun 2016, Hersonissos, Greece
Communication dans un congrès hal-01355534 v1

Task-based sparse hybrid linear solver for distributed memory heterogeneous architectures

Emmanuel Agullo , Luc Giraud , Stojce Nakov
HeteroPar'2016 worshop of Euro-Par, Aug 2016, Grenoble, France
Communication dans un congrès hal-01334738 v1

Soft errors in PCG: detection and correction

Emmanuel Agullo , Siegfried Cools , Luc Giraud , Wim Vanroose , Emrullah Fatih Yetkin
SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP 2016), Apr 2016, Paris, France
Communication dans un congrès hal-01301240 v1

Semi-Algebraic Coarse Space for Parallel Sparse Hybrid Solvers

Emmanuel Agullo , Louis Poirel , Luc Giraud
Journée Calcul Haute Performance et Décomposition de Domaines, Apr 2016, Paris, France
Communication dans un congrès hal-01440792 v1

Task-based Conjugate Gradient: from multi-GPU towards heterogeneous architectures

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Stojce Nakov , Jean Roman
HeteroPar'2016 worshop of Euro-Par, Aug 2016, Grenoble, France. ⟨10.1007/978-3-319-58943-5⟩
Communication dans un congrès hal-01334734 v1

Numerical fault tolerant strategies for resilient parallel eigensolvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Mawussi Zounon
IMA Conference on Numerical Linear Algebra and Optimization, Sep 2016, Birmingham, United Kingdom
Communication dans un congrès hal-01334631 v1

Hard faults and soft errors: possible numerical remedies in linear algebra solvers

Emmanuel Agullo , Siegfried Cools , Luc Giraud , Alexandre Moreau , Pablo Salas et al.
VecPar - International meeting on High Performance Computing for Computational science, Jun 2016, Porto, Portugal
Communication dans un congrès hal-01334675 v1
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On rounding error resilience, maximal attainable accuracy and parallel performance of the pipelined Conjugate Gradients method for large-scale linear systems in PETSc

Siegfried Cools , Wim Vanroose , Emrullah Fatih Yetkin , Emmanuel Agullo , Luc Giraud
EASC 2016 - Exascale Applications and Software Conference, Apr 2016, Stockholm, Sweden. pp.1-10, ⟨10.1145/2938615.2938621⟩
Communication dans un congrès hal-01734422 v1

Combining Software Pipelining with Numerical Pipelining in the Conjugate Gradient Algorithm

Emmanuel Agullo , Luc Giraud , Stojce Nakov
SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP 2016), Apr 2016, Paris, France
Communication dans un congrès hal-01301237 v1

Coarse Grid Correction for the MaPHyS Algebraic Domain Decomposition Solver

Emmanuel Agullo , Luc Giraud , Louis Poirel
Sparse Days 2016, Jun 2016, Toulouse, France
Communication dans un congrès hal-01440803 v1

H-Matrix Solver for FEM/BEM

Emmanuel Agullo , Aurélien Falco , Luc Giraud , Benoît Lizé , Guillaume Sylvand
CIMI Workshop on Fast Direct Solvers, Jun 2015, Toulouse, France
Communication dans un congrès hal-01215345 v1

Reliability of Checksum based Detection for Soft Errors in Conjugate Gradient Variants

Emmanuel Agullo , Luc Giraud , Emrullah Fatih Yetkin
SIAM Conference on Computational Science and Engineering (SIAM CSE 2015), Mar 2015, Salt Lake city, Utah, United States
Communication dans un congrès hal-01200706 v1

On Numerical Resiliency in Numerical Linear Algebra Solvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Emrullah Fatih Yetkin , Mawussi Zounon
Salishan Conference on High-Speed Computing, DOE laboratories, Apr 2015, Salishan, United States
Communication dans un congrès hal-01162627 v1

H-matrix techniques for parallel hybrid solvers

Emmanuel Agullo , Eric Darve , Yuval Harness , Luc Giraud
CIMI Workshop on Fast Direct Solvers, Jun 2015, Toulouse, France
Communication dans un congrès hal-01215344 v1

On Resiliency in Krylov Solvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Emrullah Fatih Yetkin , Mawussi Zounon
PACS'15: Plateform for Advanced Scientific Computing Conference, Jun 2015, Zurich, Switzerland
Communication dans un congrès hal-01162618 v1

Data sparse techniques for parallel hybrid solvers

Emmanuel Agullo , Eric Darve , Luc Giraud , Yuval Harness
SIAM Conference on Applied Linear Algebra (SIAM LA 2015), Apr 2015, Atlanta, United States
Communication dans un congrès hal-01256230 v1
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On the resilience of parallel sparse hybrid solvers

Emmanuel Agullo , Luc Giraud , Mawussi Zounon
HiPC 2015 - IEEE International Conference on High Performance Computing, Dec 2015, Bangalore, India
Communication dans un congrès hal-01256316 v2

Recover-Restart Strategies for Resilient Parallel Numerical Linear Algebra Solvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Mawussi Zounon
Householder Symposium XIX, Jun 2014, Spa, Belgium
Communication dans un congrès hal-01018760 v1

Parallel hybrid linear solvers

Luc Giraud
4ème Ecole Thématique de Simulation Numérique, CEA, Apr 2014, Porquerolles, France
Communication dans un congrès hal-01118437 v1

Preliminary Investigations on Resilient Parallel Numerical Linear Algebra Solvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Emrullah Fatih Yetkin , Mawussi Zounon
SIAM Workshop on Exascale Applied Mathematics Challenges and Opportunities, Jul 2014, Chicago, United States
Communication dans un congrès hal-01018763 v1

Recover-Restart Strategies for Resilient Parallel Numerical Linear Algebra Solvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Mawussi Zounon
International Workshop on Parallel Matrix Algorithms and Applications (PMAA 2014), Jul 2014, Lugano, Switzerland
Communication dans un congrès hal-01058138 v1

Some progresses in parallel numerical linear algebra toward extreme scale

Luc Giraud
Séminaire : Mesocentre de calcul de l'Ecole Centrale Paris (Session sur les méthodes de résolution des sytèmes linéaires), Ecole Centrale Paris, Dec 2014, Paris, France
Communication dans un congrès hal-01120201 v1

Toward parallel scalable linear solvers suited for large scale hierarchical parallel platforms

Emmanuel Agullo , Mathieu Faverge , Luc Giraud , Abdou Guermouche , Pierre Ramet et al.
World Congress on Computational Mechanics, Jul 2014, Barcelona, Spain
Communication dans un congrès hal-00987110 v1

Recovery-Restart Techniques for Resilient Krylov Methods

Emmanuel Agullo , Luc Giraud , Salas Pablo , Mawussi Zounon
SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP 2014), Feb 2014, Portland, United States
Communication dans un congrès hal-01062232 v1

Some Progresses on Krylov Linear Solvers: Block-variants and Resiliency

Emmanuel Agullo , Luc Giraud , Yan-Fei Jing , Pablo Salas , Emrullah Fatih Yetkin et al.
Argonne Mathematics and Computer Science Seminar, Jul 2014, Lemont, United States
Communication dans un congrès hal-01018761 v1

Pipelining the CG Solver Over a Runtime System

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Stojce Nakov , Jean Roman
GPU Technology Conference, NVIIDA, Mar 2013, San Jose, United States
Communication dans un congrès hal-00934948 v1

Towards resilient parallel linear Krylov solvers with recover-restart strategies

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman
European Numerical Mathematics and Advanced Applications, Aug 2013, Lausanne, Switzerland
Communication dans un congrès hal-00933640 v1

Eigensolvers for thermoacoustics instabilities in combustion chambers

Luc Giraud , Pablo Salas , Xavier Vasseur
SIAM Conference on Computational Science and Engineering (SIAM CSE 2013), SIAM, Feb 2013, Boston, United States
Communication dans un congrès hal-00933498 v1
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Towards Domain Decomposition with Balanced Halo

Astrid Casadei , Luc Giraud , Pierre Ramet , Jean Roman
Workshop Celebrating 40 Years of Nested Dissection, Jul 2013, Waterloo, Canada
Communication dans un congrès hal-00924977 v1

Towards resilient parallel linear Krylov solvers: recover-restart strategies

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman , Mawussi Zounon
Sparse days 2013, CERFACS, Jun 2013, Toulouse, France
Communication dans un congrès hal-00935685 v1

Resilience at extreme scale : system level, algorithmic level or both?

Luc Giraud , Franck Cappello
SIAM Conference on Computational Science and Engineering (SIAM CSE 2013), Feb 2013, Boston, United States
Communication dans un congrès hal-00799309 v1

Parallel local time-stepping for elastodynamic equations

Yohann Dudouit , Luc Giraud , Florence Millot , Sebastien Pernet
Conference on Mathematical and Computational Issues in the Geosciences, SIAM, Jun 2013, Padua, Italy
Communication dans un congrès hal-00933533 v1

Algebraic preconditioners for parallel hybrid solvers

Luc Giraud
High Performance Computing in Science and Engineering, May 2013, Ostrava, Czech Republic
Communication dans un congrès hal-00933517 v1

On a parallel hierarchical algebraic domain decomposition method for a large scale sparse linear solver

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman
SIAM Conference on Applied Linear Algebra (SIAM LA 2012), SIAM, Jun 2012, Valencia, Spain
Communication dans un congrès hal-00719537 v1

Comparison of two sparse hybrid solvers

Emmanuel Agullo , Luc Giraud , Azzam Haidar , Matthieu Lecouvez , Xiaoye S. Li et al.
SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP 2012), SIAM, Feb 2012, Savannah, United States
Communication dans un congrès hal-00719544 v1

On a Hierarchical Parallel Algebraic Domain Decomposition Linear Solver

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Stojce Nakov , Jean Roman
Scalable Hierarchical Algorithms for eXtreme Computing (SHAX-C) Workshop, Apr 2012, Kaust, Saudi Arabia
Communication dans un congrès hal-00726630 v1

Towards resilient Krylov solvers

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman , Mawussi Zounon
SIAM Conference on Applied Linear Algebra (SIAM LA 2012), SIAM, Jun 2012, Valencia, Spain
Communication dans un congrès hal-00719534 v1
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Physically-based preconditioner for the WCIP

Nathalie Raveu , Julien Vincent , Jean-René Poirier , Ronan Perrussel , Luc Giraud
Asia-Pacific Microwave Conference (APMC 2012), Dec 2012, Kaohsiung, Taiwan. pp. 1310 - 1312, ⟨10.1109/APMC.2012.6421905⟩
Communication dans un congrès hal-00907360 v1

Pipelining the CG Solver Over a Runtime System

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Stojce Nakov , Jean Roman
International Workshop on Parallel Matrix Algorithms and Applications (PMAA 2012), Jun 2012, London, United Kingdom
Communication dans un congrès hal-00726652 v1

On a hierarchical parallel algebraic domain decomposition linear solver

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Yan-Fei Jing , Stojce Nakov et al.
Aquitaine-Euskadi Workshop on Applied Mathematics, Jun 2012, Bilbao, Spain
Communication dans un congrès hal-00719527 v1

Stability of azimuthal modes in annular combustion chambers

Pablo Salas , Luc Giraud , Jens-Dominik Müller , Gabriel Staffelbach , Thierry Poinsot
Third workshop INCA, Nov 2011, Toulouse, France
Communication dans un congrès hal-00651847 v1

Parallel algebraic domain decomposition solver for the solution of augmented systems

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman
The Second International Conference on Parallel, Distributed, Grid and Cloud Computing for Engineering, Apr 2011, Ajaccio, France
Communication dans un congrès hal-00652931 v1

Algebraic Schwarz preconditioning for the Schur complement: application to the time-harmonic Maxwell equations discretized by a discontinuous Galerkin method

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman et al.
The Twentieth International Conference on Domain Decomposition Methods, Feb 2011, San Diego La Jolla, United States
Communication dans un congrès inria-00577639 v1

Performance of a sparse hybrid linear solver on a multicore cluster

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Yohan Lee-Tin-Yien et al.
SIAM Conference on Computational Science and Engineering (CSE 2011), Feb 2011, Reno, United States
Communication dans un congrès inria-00548911 v1

Complexity analysis of sparse hybrid linear solvers

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman
3rd ''Scheduling in Aussois'' Workshop, Jun 2010, Aussois, France
Communication dans un congrès inria-00549221 v1

WCIP acceleration

Nathalie Raveu , Luc Giraud , Henri Baudrand
Asia Pacific Microwave Conference, Dec 2010, Yokohama, Japan
Communication dans un congrès inria-00551035 v1

Towards a complexity analysis of sparse hybrid linear solvers

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman
Para 2010 : State of the Art in Scientific and Parallel Computing, Jun 2010, Reykjavík, Iceland
Communication dans un congrès inria-00548913 v1

Solveurs parallèles creux hybrides direct/itératif : application à des simulations 3D

Emmanuel Agullo , Azzam Haidar , Luc Giraud , Abdou Guermouche , Yohan Lee-Tin-Yien et al.
Workshop Solveurs de systèmes linéaires de grande taille : les avancées récentes, Nov 2010, Lyon, France
Communication dans un congrès inria-00549144 v1

MaPHyS or the development of a parallel algebraic domain decomposition solver in the course of the solstice project

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman
Sparse Days 2010 Meeting at CERFACS, Jun 2010, Toulouse, France
Communication dans un congrès inria-00548915 v1

Algebraic parallel domain decomposition solver

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Yohan Lee-Tin-Yien et al.
Journée GNR MOMAS / GDR Calcul, May 2010, Paris, France
Communication dans un congrès inria-00549132 v1

Parallel scalability and complexity analysis of sparse hybrid linear solvers

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman
6th International Workshop on Parallel Matrix Algorithms and Applications (PMAA'10), Jun 2010, Basel, Switzerland
Communication dans un congrès inria-00549126 v1

Parallel algebraic hybrid linear solver for frequency domain acoustic wave modeling

Hafedh Ben-Hadj-Ali , Luc Giraud , Azzam Haidar , Stéphane Operto , Jean Virieux
SIAM conference on Applied Linear Algebra, SIAM, Oct 2009, Monterey Bay, United States
Communication dans un congrès hal-00719553 v1
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3D frequency-domain finite-difference modeling of acoustic wave propagation using a massively parallel direct solver: a feasibility study

Stéphane Operto , Jean Virieux , Patrick Amestoy , Luc Giraud , Jean-Yves L'Excellent
SEG 2006 - 76th International Exposition and Annual Meeting, Oct 2006, New Orleans, United States. pp.2265-2269, ⟨10.1190/1.2369987⟩
Communication dans un congrès hal-00408484 v1

An Overview of the GRID-TLSE Project

Michel Daydé , Luc Giraud , M. Hernandez , Jean-Yves L'Excellent , Marc Pantel et al.
VECPAR'04, Universidad Politécnica de Valencia, Jun 2004, Valence, Spain
Communication dans un congrès hal-00688814 v1
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Convergence analysis of overlapping domain decomposition preconditioners for nonlinear problems

El Mehdi Ettaouchi , Luc Giraud , Carola Kruse , Nicolas Tardieu
RR-9575, INRIA. 2025
Rapport (rapport de recherche) hal-04958735 v2
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A note on the partial convergence management for the solution of symmetric linear systems with multiple right-hand sides

Luc Giraud , Yanfei Xiang
RR-9574, Inria Centre at the University of Bordeaux. 2025
Rapport hal-04922247 v1
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Solving eigenvalue problems in high dimensions using contour integration and Tensor Train format

Olivier Coulaud , Luc Giraud , Martina Iannacito , Mohammad Issa
RR-9586, Inria. 2025, pp.19
Rapport hal-05017425 v2
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Fault-tolerant numerical iterative algorithms at scale

Alix Tremodeux , Emmanuel Agullo , Anne Benoit , Luc Giraud , Thomas Herault et al.
RR-9567, Inria Lyon. 2025
Rapport hal-04872041 v1
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A robust GMRES algorithm in Tensor Train format

Olivier Coulaud , Luc Giraud , Martina Iannacito
[Research Report] RR-9484, Inria; Alma Mater Studiorum – Università di Bologna. 2022, pp.1-48
Rapport (rapport de recherche) hal-03776529 v4
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On some orthogonalization schemes in Tensor Train format

Olivier Coulaud , Luc Giraud , Martina Iannacito
RR-9491, Inria Bordeaux - Sud-Ouest. 2022
Rapport hal-03850387 v3
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The backward stable variants of GMRES in variable accuracy

Emmanuel Agullo , Olivier Coulaud , Luc Giraud , Martina Iannacito , Gilles Marait et al.
[Research Report] RR-9483, Inria. 2022, pp.1-77
Rapport hal-03776837 v3
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A note on the strong parallel scalability of numerically scalable Poisson linear solvers

Emmanuel Agullo , Luc Giraud , Valentin Joncquieres , Gilles Marait , Louis Poirel et al.
[Research Report] RR-9423, Inria Bordeaux - Sud Ouest. 2021, pp.31
Rapport (rapport de recherche) hal-03352049 v2
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A block minimum residual norm subspace solver for sequences of multiple left and right-hand side linear systems

Luc Giraud , Yan-Fei Jing , Yanfei Xiang
[Research Report] RR-9393, Inria Bordeaux Sud-Ouest. 2021, pp.60
Rapport (rapport de recherche) hal-03146213 v3
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Recycling Krylov subspace strategies for sequences of sampled stochastic elliptic equations

Nicolas Venkovic , Paul Mycek , Luc Giraud , Olivier Le Maitre
[Research Report] RR-9425, Inria Bordeaux - Sud Ouest. 2021
Rapport (rapport de recherche) hal-03366966 v1
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Comparative study of harmonic and Rayleigh-Ritz procedures with applications to deflated conjugate gradients

Nicolas Venkovic , Paul Mycek , Luc Giraud , Olivier Le Maitre
[Research Report] Cerfacs. 2020
Rapport (rapport de recherche) hal-02434043 v1
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On soft errors in the Conjugate Gradient method: sensitivity and robust numerical detection -revised

Emmanuel Agullo , Siegfried Cools , Emrullah Fatih-Yetkin , Luc Giraud , Nick Schenkels et al.
[Research Report] RR-9330, Inria Bordeaux Sud-Ouest. 2020, pp.43
Rapport (rapport de recherche) hal-02495301 v3
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A complementary note on soft errors in the Conjugate Gradient method: the persistent error case

Emmanuel Agullo , Siegfried Cools , Emrullah Fatih-Yetkin , Luc Giraud , Nick Schenkels et al.
[Research Report] RR-9360, Inria Bordeaux Sud-Ouest. 2020
Rapport (rapport de recherche) hal-02921669 v2
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Exploring variable accuracy storage through lossy compression techniques in numerical linear algebra: a first application to flexible GMRES

Emmanuel Agullo , Franck Cappello , Sheng Di , Luc Giraud , Xin Liang et al.
[Research Report] RR-9342, Inria Bordeaux Sud-Ouest. 2020
Rapport (rapport de recherche) hal-02572910 v2
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On soft errors in the Conjugate Gradient method: sensitivity and robust numerical detection

Emmanuel Agullo , Siegfried Cools , Emrullah Fatih-Yetkin , Luc Giraud , Wim Vanroose
[Research Report] RR-9226, Inria Bordeaux Sud-Ouest. 2018
Rapport (rapport de recherche) hal-01929738 v1
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Energy analysis of a solver stack for frequency-domain electromagnetics

Emmanuel Agullo , Luc Giraud , Stéphane Lanteri , Gilles Marait , Anne-Cécile Orgerie et al.
[Research Report] RR-9240, Inria Bordeaux Sud-Ouest. 2018
Rapport (rapport de recherche) hal-01962629 v1
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Low-rank Factorizations in Data Sparse Hierarchical Algorithms for Preconditioning Symmetric Positive Definite Matrices

Emmanuel Agullo , Eric Darve , Luc Giraud , Yuval Harness
[Research Report] RR-9200, Inria Bordeaux Sud-Ouest. 2018
Rapport (rapport de recherche) hal-01856399 v2
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Robust coarse spaces for Abstract Schwarz preconditioners via generalized eigenproblems

Emmanuel Agullo , Luc Giraud , Louis Poirel
[Research Report] RR-8978, INRIA Bordeaux. 2016
Rapport (rapport de recherche) hal-01399203 v1
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Nearly optimal fast preconditioning of symmetric positive definite matrices

Emmanuel Agullo , Eric Darve , Luc Giraud , Yuval Harness
[Research Report] RR-8984, Inria Bordeaux Sud-Ouest. 2016, pp.34
Rapport (rapport de recherche) hal-01403480 v2
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Interior penalty discontinuous Galerkin method for coupled elasto-acoustic media

Yohann Dudouit , Luc Giraud , Florence Millot , Sébastien Pernet
[Research Report] RR-8986, Inria Bordeaux Sud-Ouest. 2016
Rapport (rapport de recherche) hal-01406158 v1
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Hierarchical hybrid sparse linear solver for multicore platforms

Emmanuel Agullo , Luc Giraud , Stojce Nakov , Jean Roman
[Research Report] RR-8960, INRIA Bordeaux. 2016, pp.25
Rapport (rapport de recherche) hal-01379227 v1
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Task-based hybrid linear solver for distributed memory heterogeneous architectures

Emmanuel Agullo , Luc Giraud , Stojce Nakov
[Research Report] RR-8913, Inria Bordeaux Sud-Ouest. 2016
Rapport (rapport de recherche) hal-01316783 v1
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Interpolation-restart strategies for resilient eigensolvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Mawussi Zounon
[Research Report] 8625, INRIA Bordeaux. 2015
Rapport (rapport de recherche) hal-01201748 v2
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On the resilience of a parallel sparse hybrid solver

Emmanuel Agullo , Luc Giraud , Mawussi Zounon
[Research Report] RR-8744, INRIA Bordeaux; INRIA. 2015
Rapport (rapport de recherche) hal-01165186 v2
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Block GMRES method with inexact breakdowns and deflated restarting

Emmanuel Agullo , Luc Giraud , Yan-Fei Jing
[Research Report] RR-8503, INRIA. 2014, pp.31
Rapport (rapport de recherche) hal-00963704 v2
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Spectral recycling strategies for the solution of nonlinear eigenproblems in thermoacoustics

Pablo Salas , Luc Giraud , Yousef Saad , Stéphane Moreau
[Research Report] RR-8542, INRIA. 2014, pp.23
Rapport (rapport de recherche) hal-00996601 v1
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Towards resilient parallel linear Krylov solvers: recover-restart strategies

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman , Mawussi Zounon
[Research Report] RR-8324, INRIA. 2013, pp.36
Rapport (rapport de recherche) hal-00843992 v1
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A Parallel Full Geometric Multigrid Solver for Time Harmonic Maxwell Problems

Mathieu Chanaud , Luc Giraud , David Goudin , Jean-Jacques Pesqué , Jean Roman
[Research Report] RR-8335, INRIA. 2013, pp.25
Rapport (rapport de recherche) hal-00847966 v1
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Deflation and augmentation techniques in Krylov linear solvers

Olivier Coulaud , Luc Giraud , Pierre Ramet , Xavier Vasseur
[Research Report] RR-8265, INRIA. 2013, 25 p
Rapport (rapport de recherche) hal-00803225 v1
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Task-based Conjugate-Gradient for multi-GPUs platforms

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Stojce Nakov , Jean Roman
[Research Report] RR-8192, INRIA. 2012, pp.28
Rapport (rapport de recherche) hal-00767368 v1
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Parallel algebraic domain decomposition solver for the solution of augmented systems

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman
[Research Report] RR-7516, INRIA. 2011
Rapport (rapport de recherche) inria-00559133 v1
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Sparse approximations of the Schur complement for parallel algebraic hybrid linear solvers in 3D

Luc Giraud , Azzam Haidar , Yousef Saad
[Research Report] RR-7237, INRIA. 2010, pp.18
Rapport (rapport de recherche) inria-00466828 v1
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Robustness and reliability of state-space, frame-based modeling for thermoacoustics

Mathieu Cances , Luc Giraud , Michael Bauerheim , Laurent Y.M. Gicquel , Franck Nicoud
Journal of Computational Physics, 2025, 520, pp.113472. ⟨10.1016/j.jcp.2024.113472⟩
Article dans une revue hal-04734953 v1
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A note on TT-GMRES for the solution of parametric linear systems

Olivier Coulaud , Luc Giraud , Martina Iannacito
Electronic Transactions on Numerical Analysis, 2025, 62, pp.163-187. ⟨10.1553/etna_vol62s163⟩
Article dans une revue hal-04986230 v1
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Multifacets of lossy compression for scientific data in the Joint-Laboratory of Extreme Scale Computing

Franck Cappello , Sheng Di , Robert Underwood , Dingwen Tao , Jon Calhoun et al.
Future Generation Computer Systems, 2024, ⟨10.1016/j.future.2024.05.022⟩
Article dans une revue hal-04618060 v1
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Combining reduction with synchronization barrier on multi‐core processors

Aboul‐karim Mohamed El Maarouf , Luc Giraud , Abdou Guermouche , Thomas Guignon
Concurrency and Computation: Practice and Experience, 2023, 35 (1), pp.e7402. ⟨10.1002/cpe.7402⟩
Article dans une revue hal-03948901 v2
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A block minimum residual norm subspace solver with partial convergence management for sequences of linear systems

Luc Giraud , Yan-Fei Jing , Yanfei Xiang
SIAM Journal on Matrix Analysis and Applications, 2022, 43 (2), pp.710-739. ⟨10.1137/21m1401127⟩
Article dans une revue hal-03546496 v2
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Resilience and fault tolerance in high-performance computing for numerical weather and climate prediction

Tommaso Benacchio , Luca Bonaventura , Mirco Altenbernd , Chris D Cantwell , Peter D Düben et al.
International Journal of High Performance Computing Applications, 2021, 35 (4), pp.285-311. ⟨10.1177/1094342021990433⟩
Article dans une revue hal-03138061 v1
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Resiliency in numerical algorithm design for extreme scale simulations

Emmanuel Agullo , Mirco Altenbernd , Hartwig Anzt , Leonardo Bautista-Gomez , Tommaso Benacchio et al.
International Journal of High Performance Computing Applications, 2021, pp.10943420211055188. ⟨10.1177/10943420211055188⟩
Article dans une revue hal-03348787 v1
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On soft errors in the conjugate gradient method: sensitivity and robust numerical detection

Emmanuel Agullo , Siegfried Cools , Emrullah Fatih-Yetkin , Luc Giraud , Nick Schenkels et al.
SIAM Journal on Scientific Computing, 2020, 42 (6), ⟨10.1137/18M122858X⟩
Article dans une revue hal-03022845 v1
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A Plane Wave Scattering Dedicated Integral Equation

Benjamin Alzaix , Luc Giraud , Bastiaan Michielsen , Jean-René Poirier
IEEE Transactions on Antennas and Propagation, 2020, pp.1-10. ⟨10.1109/TAP.2019.2948390⟩
Article dans une revue hal-02448907 v2
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Robust preconditioners via generalized eigenproblems for hybrid sparse linear solvers

Emmanuel Agullo , Luc Giraud , Louis Poirel
SIAM Journal on Matrix Analysis and Applications, 2019, 40 (2), pp.417-439. ⟨10.1137/17M1153765⟩
Article dans une revue hal-02074474 v1
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High order HDG method and domain decomposition solvers for frequency‐domain electromagnetics

Emmanuel Agullo , Luc Giraud , Alexis Gobé , Matthieu Kuhn , Stephane Lanteri et al.
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2019, ⟨10.1002/jnm.2678⟩
Article dans une revue hal-02327982 v1
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Analyzing the Effect of Local Rounding Error Propagation on the Maximal Attainable Accuracy of the Pipelined Conjugate Gradient Method

Siegfried Cools , Emrullah Fatih Yetkin , Emmanuel Agullo , Luc Giraud , Wim Vanroose
SIAM Journal on Matrix Analysis and Applications, 2018, 39 (1), pp.426 - 450. ⟨10.1137/17M1117872⟩
Article dans une revue hal-01753411 v1
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Low-Rank Factorizations in Data Sparse Hierarchical Algorithms for Preconditioning Symmetric Positive Definite Matrices

Emmanuel Agullo , Eric Darve , Luc Giraud , Yuval Harness
SIAM Journal on Matrix Analysis and Applications, 2018, 39 (4), pp.1701-1725
Article dans une revue hal-01940053 v1
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Guest editorial: Special issue on parallel matrix algorithms and applications (PMAA’16)

Emmanuel Agullo , Peter Arbenz , Luc Giraud , Olaf Schenk
Parallel Computing, 2018, 74, pp.1 - 2. ⟨10.1016/j.parco.2018.01.003⟩
Article dans une revue hal-01927721 v1
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ASIS v1.0: an adaptive solver for the simulation of atmospheric chemistry

Daniel Cariolle , Philippe Moinat , H. Teyssèdre , Luc Giraud , Béatrice Josse et al.
Geoscientific Model Development, 2017, 10, pp.1467 - 1485. ⟨10.5194/gmd-10-1467-2017⟩
Article dans une revue hal-01507392 v1
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Interpolation-restart strategies for resilient eigensolvers

Emmanuel Agullo , Luc Giraud , Pablo Salas , Mawussi Zounon
SIAM Journal on Scientific Computing, 2016, 38 (5), pp.C560-C583. ⟨10.1137/15M1042115⟩
Article dans une revue hal-01347793 v1

Block GMRES method with inexact breakdowns and deflated restarting

Emmanuel Agullo , Luc Giraud , Yan-Fei Jing
SIAM Journal on Matrix Analysis and Applications, 2014, 35 (4), pp.1625-1651. ⟨10.1137/140961912⟩
Article dans une revue hal-01067159 v1

A Parallel Full Geometric Multigrid Solver for Time Harmonic Maxwell Problems

Mathieu Chanaud , Luc Giraud , David Goudin , Jean-Jacques Pesqué , Jean Roman
SIAM Journal on Scientific Computing, 2014, 36 (2), pp.C119-C138. ⟨10.1137/130909512⟩
Article dans une revue hal-00933526 v1

Parallel algebraic domain decomposition solver for the solution of augmented systems

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Azzam Haidar , Jean Roman
Advances in Engineering Software, 2012, 60-61, pp.23-30. ⟨10.1016/j.advengsoft.2012.07.004⟩
Article dans une revue istex hal-00719512 v1

Parallel hierarchical hybrid linear solvers for emerging computing platforms

Emmanuel Agullo , Luc Giraud , Abdou Guermouche , Jean Roman
Comptes rendus de l’Académie des sciences. Série IIb, Mécanique, 2011, High Performance Computing, 339 (2-3), pp.96-103. ⟨10.1016/j.crme.2010.11.005⟩
Article dans une revue istex inria-00548916 v1

New curvilinear scheme for elastic wave propagation in presence of curved topography

Issam Tarrass , Luc Giraud , Pierre Thore
Geophysical Prospecting, 2011, 59 (5), pp.889--906. ⟨10.1111/j.1365-2478.2011.00972.x⟩
Article dans une revue istex hal-00647160 v1

Three-dimensional parallel frequency-domain visco-acoustic wave modelling based on a hybrid direct/iterative solver

Florent Sourbier , Azzam Haidar , Luc Giraud , Hafedh Ben-Hadj-Ali , Stéphane Operto et al.
Geophysical Prospecting, 2011, 59 (5), pp.834-856. ⟨10.1111/j.1365-2478.2011.00966.x⟩
Article dans une revue istex hal-00647179 v1

Using multiple levels of parallelism to enhance the performance of domain decomposition solvers

Luc Giraud , Azzam Haidar , Stéphane Pralet
Parallel Computing, 2010, 36 (5-6), pp.285-296. ⟨10.1016/j.parco.2009.12.006⟩
Article dans une revue istex inria-00542444 v1

Sparse approximations of the Schur complement for parallel algebraic hybrid linear solvers in 3D

Luc Giraud , Azzam Haidar , Yousef Saad
Numerical Mathematics: Theory, Methods and Applications, 2010, 3 (3), pp.276-294
Article dans une revue inria-00542450 v1

Flexible GMRES with deflated restarting

Luc Giraud , Serge Gratton , Xavier Pinel , Xavier Vasseur
SIAM Journal on Scientific Computing, 2010, 32 (4), pp.1858--1878. ⟨10.1137/080741847⟩
Article dans une revue inria-00542426 v1

Parallel algebraic hybrid solvers for large 3D convection-diffusion problems

Luc Giraud , Azzam Haidar
Numerical Algorithms, 2009, 51 (2), pp.151-177. ⟨10.1007/s11075-008-9248-x⟩
Article dans une revue istex hal-00441717 v1

Parallel Tools for Solving Incremental Dense Least Squares Problems: Application to Space Geodesy

Marc Baboulin , Luc Giraud , Serge Gratton , Julien Langou
Journal of Algorithms and Computational Technology, 2009, 3 (1), pp.117-133. ⟨10.1260/174830109787186541⟩
Article dans une revue hal-03973310 v1
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Convolution neural operator preconditioning for the solution of some heterogeneous PDES

Yanfei Xiang , Luc Giraud
DTE - AICOMAS 2025 - Digital Twins in Engineering & Artificial Intelligence and Computational Methods in Applied Science, Feb 2025, Paris, France. 2025
Document associé à des manifestations scientifiques hal-04961884 v1
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Neural operator preconditioning for accelerating the solution of the parametric Helmholtz equations

Yanfei Xiang , Luc Giraud , Paul Mycek , Maksym Shpakovych , Carola Kruse
2024 SIAM Conference on Applied Linear Algebra (SIAM LA24), May 2024, Paris, France. pp.2
Document associé à des manifestations scientifiques hal-04581208 v4
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Orthogonalization schemes in tensor train format

Martina Iannacito , Olivier Coulaud , Luc Giraud
SIAM Conference on Applied Linear Algebra (LA24), May 2024, Paris, France
Document associé à des manifestations scientifiques hal-04587668 v1
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Orthogonalization schemes in tensor train format

Martina Iannacito , Olivier Coulaud , Luc Giraud
The 29th Biennial Conference on Numerical Analysis 2023, Jun 2023, Glasgow, United Kingdom
Document associé à des manifestations scientifiques hal-04394115 v1
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Hybridization of Machine Learning and Numerical Linear Algebra Techniques for Scientific Computing: Learned Minimum Residual Solvers for the Helmholtz Equations

Yanfei Xiang , Luc Giraud , Paul Mycek , Carola Kruse
CSE 2023 - SIAM Conference on Computational Science and Engineering, Feb 2023, Amsterdam, Netherlands. 2023
Document associé à des manifestations scientifiques hal-04398087 v2
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Orthogonalization schemes in tensor train format

Martina Iannacito , Olivier Coulaud , Luc Giraud
AG 2023 - SIAM Conference on Applied Algebraic Geometry, Jul 2023, Eindhoven / Hybrid, Netherlands. 2023
Document associé à des manifestations scientifiques hal-04394130 v1

Deflation and augmentation techniques in Krylov linear solvers

Olivier Coulaud , Luc Giraud , Pierre Ramet , Xavier Vasseur
Topping, B.H.V and Ivanyi, P. Developments in Parallel - Distributed - Grid and Cloud Computing for Engineering, Saxe-Coburg Publications, pp.249--275, 2013, 978-1-874672-62-3
Chapitre d'ouvrage hal-00860339 v1

Euro-Par’ 99 Parallel Processing : 5th International Euro-Par Conference Toulouse, France, August 31–September 3, 1999 Proceedings

Patrick Amestoy , Philippe Berger , Michel Daydé , Daniel Ruiz , Iain Duff et al.
5th International Euro-Par Conference on Parallel Processing (1999), 1685, Springer, 1999, Lecture Notes in Computer Science (LNCS), 978-3-540-66443-7. ⟨10.1007/3-540-48311-X⟩
Proceedings/Recueil des communications hal-04500452 v1