Workshop on Approximate Computing in Numerical Linear Algebra

7-10 Oct 2025 Paris (France)

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Program

Week Tue. 07 Wed. 08 Thu. 09 Fri. 10 List

Wednesday, October 8, 2025

08:00

09:00

10:00

11:00

12:00

13:00

14:00

15:00

16:00

17:00

18:00

›8:00 (30min)

Welcome coffee

8:00 - 8:30 (30min)

Welcome coffee

›8:30 (10min)

Opening remarks

8:30 - 8:40 (10min)

Opening remarks

›8:40 (1h40)

Session 1
Chair: Valeria Simoncini

8:40 - 10:20 (1h40)

Session 1

Chair: Valeria Simoncini

› Avoiding breakdown in incomplete factorizations in low precision arithmetic - Jennifer Scott, STFC-Rutherford Appleton Laboratory 08:40-09:00 (20min)

› Mixed precision strategies for preconditioned GMRES - Bastien Vieublé, Chinese Academy of Sciences 09:00-09:20 (20min)

› The numerical stability of sketched GMRES - Liam Burke, Charles University 09:20-09:40 (20min)

› On the numerical stability of the preconditioned conjugate gradient algorithm using mixed precision - Thomas Bake, Charles University 09:40-10:00 (20min)

› Mixed precision augmented GMRES - Yongseok Jang, LIP6 10:00-10:20 (20min)

›10:20 (40min)

Coffee break

10:20 - 11:00 (40min)

Coffee break

›11:00 (1h20)

Session 2
Chair: Jean-Michel Muller

11:00 - 12:20 (1h20)

Session 2

Chair: Jean-Michel Muller

› Is Mixed Precision Computing really the Top Priority? - Hartwig Anzt, Technical University of Munich 11:00-11:20 (20min)

› Emulating High-precision Matrix Operations on Low-precision Matrix Engines - Rio Yokota, Institute of Science Tokyo 11:20-11:40 (20min)

› Computing Floating-Point Matrix Products via Low-Precision Integer Arithmetic - Massimiliano Fasi, University of Leeds 11:40-12:00 (20min)

› How Tensor Core-Accelerated Mixed-Precision Computing and Floating-Point Emulation Can Improve Linear Algebra Performance and Energy Efficiency - Harun Bayraktar, NVIDIA 12:00-12:20 (20min)

›12:20 (1h40)

Lunch

12:20 - 14:00 (1h40)

Lunch

›14:00 (1h40)

Session 3
Chair: Paolo Bientinesi

14:00 - 15:40 (1h40)

Session 3

Chair: Paolo Bientinesi

› A practical, fully parallel implementation of the (H-)Tucker decomposition via randomization - Martina Iannacito, Università di Bologna 14:00-14:20 (20min)

› Recent advances in mixed-precision low-rank tensor approximations - Eda Oktay, Max Planck Institute for Dynamics of Complex Technical Systems 14:20-14:40 (20min)

› TT-FEAST: A High-Dimensional Eigenvalue Solver using Contour Integration and Tensor Train format - Mohammad Issa, CEA LIST 14:40-15:00 (20min)

› Error Controlled Compression of Scientific Data with Low-Rank Approximations - George Turkiyyah, KAUST 15:00-15:20 (20min)

› Floating Point Compression for H-Matrices - Clément Peaucelle, Airbus 15:20-15:40 (20min)

›15:40 (40min)

Coffee break

15:40 - 16:20 (40min)

Coffee break

›16:20 (1h40)

Session 4
Chair: Hartwig Anzt

16:20 - 18:00 (1h40)

Session 4

Chair: Hartwig Anzt

› Surrogate techniques for matrix-free sparse linear solvers - Ulrich Rüde, CERFACS, VSB-Technical University of Ostrava, FAU Erlangen-Nürnberg 16:20-16:40 (20min)

› Multigrid with Linear Storage Complexity - Daniel Bauer, Friedrich-Alexander-Universität Erlangen-Nürnberg 16:40-17:00 (20min)

› Mixed precision multigrid V-cycle method - Petr Vacek, IFPEN 17:00-17:20 (20min)

› Mixed Precision Domain Decomposition Preconditioners: Perturbation Analysis and Practical Guidelines - Tom Caruso, LJLL 17:20-17:40 (20min)

› Two-level asynchronous substructuring domain decomposition solvers - Frédéric Magoulès, CentraleSupéléc 17:40-18:00 (20min)

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