FJWNC 2025

The Second French-Japanese Workshop on Numerical Computations

- Dedicated to Prof. Nobito Yamamoto on the occasion of his (first) retirement -

March 11 - 15, 2025

Pierre and Marie Curie campus, Sorbonne University, Paris, France

Last Update: March 13, 2025

The Second French-Japanese Workshop on Numerical Computations 2025 (FJWNC 2025) will be held at the Pierre and Marie Curie campus, Sorbonne University on March 11 - 15, 2025. The purpose of this workshop is to enhance the understanding and collaboration among researchers in the field of numerical computations.

Date and Place
Date: March 11 (Tue) - 15 (Sat), 2025
Place: Pierre and Marie Curie campus, Sorbonne University [Tower 24-25, 4th floor, Room 405]
Address: 4 Place Jussieu, 75005 Paris, France
Organizers
Stef Graillat (Sorbonne University) and Takeshi Ogita (Waseda University)
Participants (as of Feb. 19)
- Stef Graillat (Sorbonne University, Paris)
- Fabienne Jézéquel (Sorbonne University, Paris)
- Takehiko Kinoshita (Saga University, Saga)
- Kenta Kobayashi (Hitotsubashi University, Tokyo)
- Philippe Langlois (Université de Perpignan Via Domitia, Perpignan)
- Théo Mary (Sorbonne University, Paris)
- Takayasu Matsuo (The University of Tokyo)
- Jean-Michel Muller (ENS de Lyon, Lyon)
- Takeshi Ogita (Waseda University, Tokyo)
- Katsuhisa Ozaki (Shibaura Institute of Technology, Saitama)
- Shun Sato (The University of Tokyo)
- Kazuaki Tanaka (Waseda University, Tokyo)
- Takeshi Terao (Kyushu University, Fukuoka)
- Takuya Tsuchiya (Osaka University, Osaka)
- Yoshitaka Watanabe (Kyushu University, Fukuoka)
- Nobito Yamamoto (The University of Electro-Communications, Tokyo)
Schedule

[March 11 (Tue)]
Get Together (16:00 - 18:00)
- Preparation of Workshop
- Campus Tour at Sorbonne University
[March 12 (Wed)]
Coffee Break (8:45 - 9:00)

Morning Session (9:00 - 12:00):
- Talks
  1. Jean-Michel Muller: Software emulation of 3Sum and the FMA.
  2. Katsuhisa Ozaki: Fast and accurate algorithm for matrix multiplication using fused multiply-add and its applications.
  3. Fabienne Jézéquel: Probabilistic estimation of the accuracy of inner products and application to stochastic validation.
Afternoon Session (14:00 - 18:00):
- Free Discussion
[March 13 (Thr)]
Coffee Break (8:45 - 9:00)

Morning Session (9:00 - 12:00):
- Talks
  1. Kazuaki Tanaka: Green's function-based framework for pointwise enclosures: Extending super- and sub-solutions of Poisson's equation.
  2. Yoshitaka Watanabe: Recent topics of numerical verification methods for partial diﬀerential equations.
  3. Nobito Yamamoto: Verified computation as tools of analysis.
Workshop Reception at Restaurant MAISON (13:00 - 16:00)

Afternoon Session (15:30 - 18:00):
- Free Discussion
[March 14 (Fri)]
Coffee Break (8:45 - 9:00)

Morning Session (9:00 - 12:00):
- Talks
  1. Théo Mary: Condense & Distill: fast distillation of large floating-point sums via condensation.
  2. Takeshi Terao: Verified error bounds for the singular values of structured matrices.
  3. Kenta Kobayashi: Error estimation for finite element solutions on meshes that contain thin elements.
Afternoon Session (14:00 - 18:00):
- Free Discussion
[March 15 (Sat)]
Morning Session (9:00 - 12:00):
- Free Discussion
Aternoon Session (14:00 - 18:00):
- Free Discussion and Summary of FJWNC 2025
Past Workshop
- FJWNC 2015
Sponsors

FJWNC 2025

The Second French-Japanese Workshop on Numerical Computations

- Dedicated to Prof. Nobito Yamamoto on the occasion of his (first) retirement -

March 11 - 15, 2025

Pierre and Marie Curie campus, Sorbonne University, Paris, France

[March 11 (Tue)]

[March 12 (Wed)]

[March 13 (Thr)]

[March 14 (Fri)]

[March 15 (Sat)]