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MUMPS User Days 2023

Sorbonne University, Paris, France
Sorbonne Université
(credits: Vincent Bourdon; copyright: Sorbonne)
22 and 23 June 2023


The 2023 MUMPS User Days were the fifth edition of the series.

The MUMPS User Days are events which aim at bringing together MUMPS users from both academia and industry and MUMPS developers. The general theme of these meetings ranges from sparse direct solvers and related issues to applications and experiences with MUMPS. It is also a great opportunity for informal exchanges and discussions between users and developers of MUMPS.

The event is coorganized by Théo Mary, Fabienne Jezequel (PEQUAN, LIP6, Sorbonne University) and Chiara Puglisi (Mumps Technologies).

Please note that remote connection to the event will not be possible.


Thursday, June 22nd

8.30-8.45 Registration and welcome coffee
8.45-9.00 Fabienne Jézéquel (LIP6)
Welcome and presentation of the two day meeting
9.00-9.45 MUMPS overview and recent features (MUMPS Group) (slides)
9.45-10.15 Eric LEQUINIOU (Altair, France)
Leveraging MUMPS to enhance performance of Altair Solvers
10.15-10.35 François-Henry ROUET (Ansys, USA)
MUMPS-BLR inside a preconditioned eigensolver
10.35-11.05 Coffee Break
11.05-11.25 Olivier BOITEAU (EDF Lab, France )
Feedback on the use of MUMPS in EDF codes
11.25-11.45 Ramzi MESSAHEL (Safran Tech, France)
Feedback on the use of MUMPS in Safran Tech’s applications: a multithread performance evaluation of MUMPS
11.45-12.05 Jason PAVLIDIS (Moduleering Company, Greece)
Scalability of normal modes computation in Sunshine using MUMPS solver
12.05-12.35 Robert LUCAS (Ansys, USA)
A Changing Landscape
12.35-14.20 Lunch
14.20-14.50 Bastien VIEUBLE (University of Manchester, United Kingdom)
A new backward error analysis framework for GMRES and its application to GMRES preconditioned with MUMPS in mixed precision
14.50-15.10 Matthieu GEREST (EDF R&D, LIP6-Sorbonne University, France)
Solving linear systems efficiently using Block Low-Rank compression in mixed precision
15.10-15.30 Roméo MOLINA (LIP6-Sorbonne University, France)
Adaptive precision algorithms for SpMV and iterative solvers
15.30-16.00 Coffee Break
16.00-16.30 Hélène BARUCQ (Inria, France)
Performance of time-harmonic wave modeling and inversion using Hybridizable Discontinuous Galerkin discretization and the MUMPS solver
16.30-17.00 Stéphane OPERTO (CNRS, France)
High-resolution seismic imaging of the subsurface with MUMPS: Solving the time-harmonic wave equation with multiple sparse right-hand sides in large computational meshes
17.00-17.30 Chia Wei HSU (University of Southern California, USA)
Augmented partial factorization: efficient computation of the generalized scattering matrix
17.30-18.10 MUMPS on-going work and perspectives. Exchanges and discussions (MUMPS Group) (slides)
19.15-22.00 Banquet at "Bouillon & Racine"

Friday, June 23rd

8.30-9.00 Welcome coffee
9.00-9.30 François PELLEGRINI (Bordeaux University & Inria, France)
What to expect of a 30 y.o. Scotch
9.30-10.00 Thierry GAUTIER (Inria, France)
XKBlas: under the hood
10.00-10.20 Julien MINIERE (AS+/Eolen, France)
Porting MUMPS on CINES-ADASTRA with OpenMP 5
10.20-10.50 Coffee Break
10.50-11.10 Pierre JOLIVET (CNRS, France)
11.10-11.30 Henning LEEMHUIS (University of Wuppertal, Germany)
Direct solves on a multigrid solver in lattice quantum chromodynamics (QCD)
11.30-12.00 Cédric CONTENT, Emeric MARTIN (ONERA, France)
High-fidelity simulations of turbulent compressible flows in aerodynamics: some typical applications with ONERA CFD codes
12.00-12.20 Yuri FELDMAN (Ben Gurion University, Israel)
Block-Gauss-Seidel Immersed Boundary Method Accelerated by MUMPS
12.20-12.30 Closing session
12.30-14.00 Lunch
14.00-15.00 Informal technical discussion between MUMPS group and interested participants


list of attendees (photo).


The 2023 MUMPS User Days were held at

Sorbonne University, Campus Pierre et Marie Curie
4 place Jussieu
75005 PARIS
Getting to Sorbonne University
Campus Pierre et Marie Curie
(credits: Google maps)


This event was supported by:

Mumps Technologies Sorbonne University LIP6 CNRS EDF


For more information, please write to: mumps-days [at] mumps-tech [.] com.