Luc Giraud

136
Documents

Publications

Publications

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Practical stopping criteria for GMRES

Alexandre Malhéné , Emmanuel Agullo , Luc Giraud , Miroslav Rozloznik
Sparse Days, Jun 2025, Toulouse, France
Communication dans un congrès hal-05200599 v1
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Sparse Matrix Ordering for Fine Grain Parallel Triangular Solve Using SIMD

Aboul-Karim Mohamed El Maarouf , Luc Giraud , Abdou Guermouche , Thomas Guignon
15th International Conference on Parallel Processing & Applied Mathematics, Czestochowa University of Technology; Technical University of Ostrava, Sep 2024, Ostrava, Czech Republic. pp.51-64, ⟨10.1007/978-3-031-85697-6_4⟩
Communication dans un congrès hal-05185404 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, Kenjiro Terada, John Dolbow, Ferdinando Auricchio, Harald van Brummelen, Dominique Baillargeat, Charbel Farhat, Georges Karniadakis, Stefan Kollmannsberger, Trond Kvamsdal, Vissarion Papadopoulos, Ruben Sevilla, Feb 2025, Paris, France
Communication dans un congrès hal-04961884 v1

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
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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), Laura Grigori, Daniel Kressner, May 2024, Paris, France. pp.2
Communication dans un congrès 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), Laura Grigori; Daniel Kressner, May 2024, Paris, France
Communication dans un congrès hal-04587668 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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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, RAI Congress Centre | Amsterdam, The Netherlands; SIAM, Feb 2023, Amsterdam, Netherlands
Communication dans un congrès hal-04398087 v2
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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
Communication dans un congrès hal-04394115 v1
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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
Communication dans un congrès hal-04394130 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
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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

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

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
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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

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 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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
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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

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

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

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

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

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

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

WCIP acceleration

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

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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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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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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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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Neural network preconditioning: a case study for the solution of the parametric Helmholtz equation

Luc Giraud , Carola Kruse , Paul Mycek , Maksym Shpakovych , Yanfei Xiang
RR-9593, Inria Centre at the University of Bordeaux, France. 2025
Rapport (rapport de recherche) hal-05157038 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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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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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

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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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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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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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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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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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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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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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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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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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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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

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

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

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

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

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