Recent news

• November 2025
  • Erin Carson and I wrote a SIAM News article on mixed precision algorithms.
  • I gave a talk at RAIM (Lyon) on precision emulation.
• October 2025
  • I gave a talk at GAMM ANLA (Bologna) on precision emulation.
  • I defended my habilitation! Check out the slides and manuscript!
  • New preprint on mixed precision BiCGStab!
• September 2025
  • I gave a talk at RAL (Oxford) on green computing via mixed precision. There is also a video of the talk!
• July 2025
  • New preprint on mixed precision augmented GMRES!
  • I gave a talk at CERN (Geneva) on mixed precision computing. There is also a video of the talk!
• June 2025
  • I gave a talk at Sparse Days (Toulouse) on mixed precision GMRES.
• May 2025
  • New preprint on mixed precision preconditioned GMRES!
• April 2025
  • New preprint on memory accessors!
• March 2025
  • New preprint on the stability of tree tensor networks!
  • New preprint on mixed precision accumulation for neural networks!
• January 2025
  • New preprint on multiword matrix multiplication over finite fields!

Research interests

My research concerns the design, development, and analysis of high performance parallel numerical algorithms.

My recent work has particularly focused on accelerating linear algebra computations by harnessing numerical approximations, such as low-rank compression, mixed precision algorithms, and randomization.

Publications

Please refer to my publications and talks pages for a list of my recent research activities. You can also check out my Google Scholar profile.

Open positions

We have multiple open positions at all levels (Master, PhD, postdoc, and permanent positions) available in our team. Please contact me if you are interested. See in particular here for currently available Master internships, and here for details on PhD and postdoc positions.

Teaching

• Arithmétique flottante et analyse d'erreur (AFAE, Sorbonne Université): lectures available on Moodle
• Harnessing inexactness in scientific computing (ENS Lyon)

Projects

Current projects

• FPT4
• MUMPS
• NumPEx
• MixHPC

Past projects

• InterFLOP
• SEISCOPE
• ICONIC
• STRUMPACK
• MAGMA

Supervision

Postdocs

• Liam Burke
• Yongseok Jang
• Antoine Jego

PhD students

• Giuseppe Carrino
• Alexandre Tabouret
• Ouassel El Habti
• Karmijn Hoogveld
• Tom Caruso
• Hugo Dorfsman
• Dimitri Lesnoff
• Matthieu Robeyns
• Sébastien Dubois
• Théo Beuzeville
• Matthieu Gerest
• Bastien Vieublé

Master students

• Erik Fabrizzi
• Nicolas Catoni
• Roméo Molina
• Atef Dorai

Awards

• Lanczos ECMI/EMS Prize for mathematical software (with P. Amestoy and J.-Y. L'Excellent)
• Médaille de bronze du CNRS 2024
• SIAM Activity Group on Linear Algebra Early Career Prize 2021
• Second Prize for the 20th IMA Leslie Fox Prize
• Honorable mention for the 2020 Householder Prize
• Prix de thèse Gilles Kahn 2018