[Dottorcomp] Fwd: [sciences-ljll-seminaire] Aujourd'hui vendredi 13 octobre à 14h au Séminaire du LJLL : Daan Huybrechs (exposé avec diffusion simultanée par Zoom)

[Lorenzo Tamellini]

Buongiorno a tutt*

ricevo e inoltro l'avviso di seminario qui sotto

Cordiali saluti,
Lorenzo Tamellini

---------- Forwarded message ---------
Da: francois murat <francois.murat a sorbonne-universite.fr>
Date: ven 13 ott 2023 alle ore 01:03
Subject: [sciences-ljll-seminaire] Aujourd'hui vendredi 13 octobre à 14h au
Séminaire du LJLL : Daan Huybrechs (exposé avec diffusion simultanée par
Zoom)
To: <sciences-ljll-seminaire a listes.sorbonne-universite.fr>



*Aujourd'hui vendredi **13 octobre 2023 **à 14h au Séminaire du LJLL*

*Daan Huybrechs *(Université Catholique, Louvain)

*Solving problems with enriched bases and overcomplete sets*

*Résumé*
Computational problems involving PDEs and integral equations are typically
discretized using a basis, often in the form of piecewise polynomials on a
mesh. Yet, an expert practitioner may have more knowledge of features of
the solution: singularities, phases of oscillation, discontinuities,
asymptotic behaviour or mixed forms of available data. Can that knowledge
be used to enrich a discretization? How can one "add features" to a basis?
While the result may be overcomplete, and cease to be a basis, clearly a
lot of opportunities arise. In this talk we survey recent advances in this
area, covering a theory of approximation in overcomplete sets, practical
recommendations when working with "creative discretizations", efficient
algorithms to compute such approximations and a number of applications. We
end with novel ways of dealing with singularities of functions which share
seemingly universal underlying mathematics.

*L'exposé sera donné en personne de 14h à 15h dans la salle du séminaire du
Laboratoire Jacques-Louis Lions*
Campus Jussieu, Sorbonne Université, 4 place Jussieu, Paris 5ème,
barre 15-16, 3ème étage, salle 09 (15-16-3-09).
*L'exposé sera également diffusé simultanément par Zoom.*

*Identifiants de connexion Zoom :*
*Date et heure : *Vendredi 13 octobre 2023 14h00-15h00 (heure de Paris)
*Sujet : *Séminaire LJLL 13 10 2023 D. Huybrechs
*Lien Zoom pour assister à l'exposé :*
https://zoom.us/j/93431893278?pwd=Uml1TzdDWTcvKzRjSFl5WW9ocEZQdz09
*ID de réunion : *934 3189 3278
*Code secret : *632224
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