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Lundi 18 Janvier
| Heure: |
14:00 - 18:00 |
| Lieu: |
Salle B405, bâtiment B, LAGA, Institut Galilée, Université Paris 13 |
| Résumé: |
Analyse semi-classique & Physique mathématique - Problèmes Spectraux en Physique Mathématique - |
| Description: |
Séminaire tournant |
| Heure: |
14:00 - 18:00 |
| Lieu: |
Salle B405, bâtiment B, LAGA, Institut Galilée, Université Paris 13 |
| Résumé: |
EDP & Physique mathématique - Problèmes Spectraux en Physique Mathématique - |
| Description: |
Séminaire tournant |
Jeudi 21 Janvier
| Heure: |
10:00 - 11:00 |
| Lieu: |
Séminaire en ligne |
| Résumé: |
Topologie algébrique - Minimal models for graphs-related operadic algebras - |
| Description: |
Jovana ObradovicWe construct explicit minimal models for the (hyper)operads governing modular, |
Vendredi 22 Janvier
| Heure: |
10:30 - 12:00 |
| Lieu: |
Exposé en distanciel |
| Résumé: |
Géométrie Arithmétique et Motivique - Around the conjectures of Mazur and Rubin on the distribution of modular symbols - |
| Description: |
Asbjørn NordentoftLien researchseminars.org |
| Heure: |
15:30 - 16:30 |
| Lieu: |
Visioséminaire |
| Résumé: |
PM - EDP - Co-dimension one stable blowup and threshold phenomena for supercritical wave equations - |
| Description: |
Birgit Schörkhuber
Self-similar solutions play an important role in the dynamics of nonlinear evolution equations and can provide explicit examples for the formation of singularities in finite time. This talk is concerned with wave equations with a focusing power nonlinearity in the so-called energy supercritical case. These rather simple models serve as toy problems for more involved field equations from theoretical physics. After a brief summary of known results on blowup dynamics for this class of equations, I will present new explicit examples of self-similar solutions for the wave equation with a cubic, respectively, a quadratic nonlinearity. I will discuss methods to analyse the stability of these solutions and show that they are co-dimension one stable modulo symmetries. Furthermore, we discuss their role in the characterization of the threshold between finite-time blowup and global existence. |
| Heure: |
15:30 - 16:30 |
| Lieu: |
Visioséminaire |
| Résumé: |
Équations aux Dérivées Partielles non-linéaires - Co-dimension one stable blowup and threshold phenomena for supercritical wave equations - |
| Description: |
Birgit Schörkhuber
Self-similar solutions play an important role in the dynamics of nonlinear evolution equations and can provide explicit examples for the formation of singularities in finite time. This talk is concerned with wave equations with a focusing power nonlinearity in the so-called energy supercritical case. These rather simple models serve as toy problems for more involved field equations from theoretical physics. After a brief summary of known results on blowup dynamics for this class of equations, I will present new explicit examples of self-similar solutions for the wave equation with a cubic, respectively, a quadratic nonlinearity. I will discuss methods to analyse the stability of these solutions and show that they are co-dimension one stable modulo symmetries. Furthermore, we discuss their role in the characterization of the threshold between finite-time blowup and global existence. |
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