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# La semaine de l’IMB

La semaine de l’IMB recense l’ensemble des événements de la semaine en cours

• Du 18 juin 2019 à 09:30 au 20 juin 2019 à 17:30
• Manifestations Scientifiques
Salle 2
Comité d'organisation : Jesus Maria BLANCO (Universidad del País Vasco/E.H.U.), Allan Peter ENGSIG-KARUP (Technical University of Denmark), Claes ESKILSSON (Aalbord University), Carlos GUEDES SOARES (University of Lisbon), David Lannes (IMB and CNRS), Vincenzo NAVA (BCAM and Tecnalia), Mario RICCHIUTO (IMB and INRIA), Marius Tucsnak (Université de Bordeaux)
Hywec 2: The Hydrodynamics of Wave Energy Convertors

• Du 19 juin 2019 au 28 juin 2019
• Manifestations Scientifiques
Grand Amphi de math - bât A33
Comité d'organisation : Denis Benois, Pierre Parent.
Iwasawa 2019

• Le 20 juin 2019 à 14:00
• Séminaire d'Analyse
Salle de Conférences
Françoise Truc, Université de Grenoble
Topological resonances on quantum graphs
We consider metric graphs which consist of a finite graph with someleads attached to some vertices. To this graph is associated a Laplacian using the Kirchoff conditions.We describe some asymptotic properties of the resonances close tothe real axis. This is a joint work with Y. Colin de Verdière.
• Le 20 juin 2019 à 14:00
• Séminaire de l'équipe Dynamique des Populations
Salle 285
Comportement asymptotique d'un modèle épidémiologique SIR avec une phase d'immunité temporaire

• Le 20 juin 2019 à 15:30
• Le Colloquium
Salle de Conférences
Old and new aspects of the Poincaré-Birkhoff-Witt theorem
The Poincaré-Birkhoff-Witt theorem on universal enveloping algebras of Lie algebras is one of the fundamental results in many areas of mathematics: from differential geometry and representation theory to homological algebra and deformation quantisation. I shall give a short overview of that result and some of its proofs that emerged in about 120 years since Poincaré published a paper about it, and outline a new proof which perhaps captures its category-theoretic essence in the best way possible. The talk is partly based on a joint work with Pedro Tamaroff
• Le 20 juin 2019 à 17:00
• Le séminaire des doctorants
Salle 385
Gaston Vergara
Approach to the equilibrium of a model of rigid structure floating in a viscous fluid.
In this talk we will study the explicit solutions and the asymptotic behavior of a problem of return to equilibrium in a model of rigid structures floating in a viscous fluid. To present our results, we will briefly study the main asymptotic properties of Mitagg-Leffler functions in two parameters and some new results on dual properties of real Hurwitz-type polynomials. Finally, we will present numerical simulations of the asymptotic results obtained.
• Le 21 juin 2019 à 10:45
• Séminaire de Géométrie
Salle 2
Jian Wang (Grenoble)
Contractible 3-manifold and Positive scalar curvature
It is not known whether a contractible 3-manifold admits a complete metric of positive scalar curvature. For example, the Whitehead manifold is a contractible 3-manifold but not homeomorphic to $R^{3}$. In this talk, I will present my proof that it does not have a complete metric with positive scalar curvature. I will further explain that a contractible genus one 3-manifold, a notion introduced by McMillan, does not admit a complete metric of positive scalar curvature.
• Le 21 juin 2019 à 14:00
• Séminaire de Théorie des Nombres
Grand Amphi de math - bât A33
'Iwasawa 2019'

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