27 mai 2025 @ 10:30 – 11:30 – Industry 4.0, along with advancements in sensing and communication, has enabled the large-scale collection of streaming data, creating unique opportunities for system modeling and monitoring. However, the complex nature of these datasets presents significant analytical challenges. Common characteristics include high variety, high dimensionality, high velocity, and intricate spatial and temporal structures. In this talk, I […]
26 mai 2025 @ 14:00 – 15:00 – It is well-known that not every variety in positive characteristic can be lifted to characteristic 0. However, it is conjectured that lifts exist for varieties on which the Frobenius map splits globally—the so-called globally F-split varieties. Recently, Bernasconi, Brivio, Kawakami and Witaszek established the following strong version in two dimension two: globally F-split normal surfaces […]
23 mai 2025 @ 11:00 – 12:00 – The main objective of this work is to study the stability of a linear one-dimensional thermoelastic Bresse system in a bounded domain, where the coupling is given through the first component of the Bresse model with the heat conduction of Gurtin-Pipkin type. Two kinds of coupling are considered; the first coupling is of order one […]
22 mai 2025 @ 10:00 – 12:30 – Pas de séminaire ce jeudi, car il y a la matinée de lancement de la fédération de recherche MaGE. Au programme, en amphi 3 : — café de bienvenue à 10h, — de 10h30 à 11h30 : une présentation de ce qu’est une fédération de recherche du CNRS par Alessandra Sarti (Poitiers, Insmi), une présentation […]
22 mai 2025 @ 09:15 – 10:30 – First, we introduce c`adl`ag measure-valued processes, with biological motivations. We focus on the construction with Poisson point measures and the useful martingale properties it entails. Then, we present a general convergence result for these measure-valued processes. We insist on the topological difficulties encountered, related to Skorokhod spaces. Thus, even if it is self-contained, this talk […]
21 mai 2025 @ 14:00 – 15:00 – It is well understood that positivity or negativity properties of canonical line bundle encode a significant amount of geometric data about the underlying projective variety. It is therefore unsruprising to expect that the same should be true for the relative canonical divisor of families of projective varieties. For families of varieties whose canonical divisor is […]
20 mai 2025 @ 10:45 – 11:45 – In the derivation of the wave kinetic equation coming from the Schrödinger equation, a key feature is the invariance of the Schrödinger equation under the action of U(1). This allows quasi-resonances of the equation to drive the effective dynamics of the statistical evolution of solutions to the Schrödinger equation. In this talk, I will give […]
19 mai 2025 @ 14:00 – 15:00 – Let $X$ be a minimal complex projective variety. Over the past years, many similar inequalities between the Chern classes of $X$ have been obtained. Moreover, it is known precisely which varieties $X$ can achieve the equality. However, so far all results in this direction have focussed on the case where the numerical dimension of $X$ […]
16 mai 2025 @ 11:00 – 12:00 – Finite-time stabilization of linear systems using either additive or multiplicative controls is studied. A necessary condition is formulated in terms of a weak observability condition and is used to construct the set of initial states from which, the system can reach its equilibrium in finite time. Sufficient conditions are then provided to guarantee finite-time stabilization. […]
15 mai 2025 @ 14:30 – 15:30 – In this talk I will describe a way to implement the resonance method in problems of analytic number theory which are not necessarily multiplicative in nature. This extension of the method not only produces improved extreme results wherever Dirichelt’s approximation theorem has been usually employed but it also highlights its connection to Bohr’s and Jessen’s […]
