ATTENTION! Annulé pour cause de grève à la SNCF.
19 avril 2018 @ 15:45 – 16:45 – Résumé
Classical Dynamics From Self-Consistency Equations in Quantum Mechanics
19 avril 2018 @ 14:15 – 15:15 – I will explain how equations of Classical Mechanics, defined from Poisson structures, can emerge from Quantum Mechanics. This is done via self-consistency equations, which in turn imply an extended quantum dynamics. This situation generically appears for quantum systems with long-range interactions, as in the so-called BCS theory of (conventional) superconductivity.
Unbiased simulation methods based on the parametrix II
19 avril 2018 @ 10:45 – 11:45 – In these two presentations, we will first introduce using basic stochastic calculus, the parametrx method and then show how to deduce an unbiased simulation method and its interpretations. We will discuss its advantages and shortcomings and then discuss how to solve them. using a second order method. We will also give some simulation results and […]
EXTINCTION RESULTS FOR BELLMAN-HARRIS MULTITYPE BRANCHING PARTICLE SYSTEMS
18 avril 2018 @ 11:00 – 12:15 – We consider a critically branching population in R^d of particles of K types, starting off from a Poisson random population. The branching laws, lifetimes and motions of particles are type-dependent. We give conditions for asymptotic extinction in the following two cases: 1. All particle lifetimes have finite means, 2. There is a particle whose lifetime […]
Study of the existence, uniqueness of solutions and Stability for Bresse system with three infinite memories and three discrete time delays.
17 avril 2018 @ 14:00 – 15:00 – The objective of this work is the mathematical study for a Bresse system, consisting of coupled three wave equations in one dimensional open bounded domain. This system has its origin in the mechanics of structures and especially in the balance of elastic bars. We are interested in Bresse systems with three memories and three delays. […]
Efficient high order and domain decomposition methods for the time-harmonic Maxwell’s equations
17 avril 2018 @ 10:45 – 11:45 – The time-harmonic formulation of Maxwell’s equations presents several difficulties when the frequency is large. Here we propose a precise and efficient solution strategy that couples high order finite element discretizations with domain decomposition preconditioners. Finite elements suited for the approximation of the electric field are the curl-conforming (or edge) finite elements. Here, we revisit the […]
A critical point theorem in bounded sets and localization of Nash equilibrium solutions
13 avril 2018 @ 11:00 – 12:00 – The localization of a critical point of minimum type of a smooth functional is obtained in a bounded convex conical set deï¬ned by a norm and a concave upper semicontinuous functional. The technique is then used for the localization and multiplicity of Nash equilibrium solutions of nonvariational systems. Applications are given to periodic problems.
On the largest prime factors of consecutive integers
12 avril 2018 @ 14:30 – 15:30 – https://iecl.univ-lorraine.fr/Les-Seminaires/Theorie-Des-Nombres/wolfcms/seminaire.html
Modèle alpha-CIR et ses applications en finance
12 avril 2018 @ 10:45 – 11:45 – Les processus de branchement avec immigration (CBI) est une classe bien étudiée en probabilité. En particulier, les travaux de Dawson et Li ont fourni une écriture explicite d’une EDS pour un CBI général et prouvé l’unicité de sa solution. Nous exploitons cette écriture pour proposer une extension du modèle CIR pour inclure une partie à […]
Unbiased simulation methods based on the parametrix I
12 avril 2018 @ 09:15 – 10:15 – In these two presentations, we will first introduce using basic stochastic calculus, the parametrx method and then show how to deduce an unbiased simulation method and its interpretations. We will discuss its advantages and shortcomings and then discuss how to solve them. using a second order method. We will also give some simulation results and […]