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  • Videos (967)
    The geometry of subelliptic diffusions
    01:31:47
    published on September 9, 2014

    The geometry of subelliptic diffusions

    By Anton Thalmaier

    CIRM

    We discuss hypoelliptic and subelliptic diffusions; the lectures include the following topics: Malliavin calculus; Hormander's theorem; smoothness of transition probabilities under Hormander's brackets condition; control theory and Stroock-Varadhan's support theorems; hypoelliptic heat kernel ...

    Appears in collection : Sub-Riemannian manifolds : from geodesics to hypoelliptic diffusion / Géométrie sous-riemannienne : des géodésiques aux diffusions hypoelliptiques

    Missing fields : cours

    Score: 16.95726
    Anomalous Diffusion in Random Dynamical Systems
    38:04
    published on December 18, 2019

    Anomalous Diffusion in Random Dynamical Systems

    By Yuzuru Sato

    IHP

    Consider a chaotic dynamical system generating diffusion-like Brownian motion. Consider a second, nonchaotic system in which all particles localize. Let a particle experience a random combination of both systems by sampling between them in time. What type of diffusion is exhibited by this random ...

    Appears in collection : Nonlinear and stochastic methods in climate and geophysical fluid dynamics

    Missing fields : cours

    Score: 15.211209
    Le diamant aztèque - Cours 1
    published on April 7, 2015

    Le diamant aztèque - Cours 1

    By Sylvie Corteel

    CIRM

    Le but du mini-cours sera de faire un cours introductif à différentes méthodes énumeratives à travers l’exemple des pavages par dominos du diamant aztèque. On essaiera de voir les fonctions (super)-symétriques, les moments de polynômes bi-orthogonaux, les évaluations de determinants, les ...

    Appears in collection : ALEA Days / Journées ALEA

    Missing fields : diffusion

    Score: 14.98774
    Le diamant aztèque - Cours 2
    published on April 7, 2015

    Le diamant aztèque - Cours 2

    By Sylvie Corteel

    CIRM

    Le but du mini-cours sera de faire un cours introductif à différentes méthodes énumeratives à travers l’exemple des pavages par dominos du diamant aztèque. On essaiera de voir les fonctions (super)-symétriques, les moments de polynômes bi-orthogonaux, les évaluations de determinants, les ...

    Appears in collection : ALEA Days / Journées ALEA

    Missing fields : diffusion

    Score: 14.98774
    Autour de l'instabilité de Turing...
    01:37:58
    published on March 15, 2014

    Autour de l'instabilité de Turing...

    By Laurent Desvillettes

    IHP

    ... On présentera en les termes les plus élémentaires possibles les concepts mathématiques permettant de comprendre cette instabilité (linéarisation des systèmes différentiels autonomes, valeurs propres des matrices 2 x 2, diffusion comme limite de marches aléatoires simples). On présentera ...

    Appears in collections : Séminaire Mathematic Park, Math Park

    Missing fields : cours

    Score: 14.79002
    Stable Models and Algorithms for Backward Diffusion Evolutions
    49:46
    published on March 11, 2019

    Stable Models and Algorithms for Backward Diffusion Evolutions

    By Joachim Weickert

    IHP

    Backward diffusion equations are potentially useful for image enhancement and deblurring. However, these processes are regarded as typical representatives for ill-posed problems that suffer from intrinsic instabilities. These difficulties have prevented many researchers from using such evolutions.

    Appears in collection : Variational methods and optimization in imaging

    Missing fields : cours

    Score: 14.279785
    Linear Boltzmann equation and fractional diffusion
    published on December 19, 2018

    Linear Boltzmann equation and fractional diffusion

    By François Golse

    CIRM

    ... In the asymptotic regime where $\sigma \to +\infty$ and $1 − \alpha ∼ C/\sigma$, we prove that the radiation pressure exerted on the boundary of the half-space is governed by a fractional diffusion equation. This result provides an example of fractional diffusion asymptotic limit of a kinetic ...

    Appears in collection : Non standard diffusions in fluids, kinetic equations and probability / Diffusions non standards en mécanique des fluides, équations cinétiques et probabilités

    Missing fields : cours

    Score: 13.178411
    Introduction on inverse problems : Three approaches (part 2/2)
    published on November 9, 2020

    Introduction on inverse problems : Three approaches (part 2/2)

    By Michel Cristofol

    CIMPA

    The goal of this course is to give a short survey on the domain of Inverse Problems. After a general introduction I will focus on the parabolic operators and I will present around the same toy problem different technics: - the Dirichlet to Neumann methodology (see [1]), - the Carleman ...

    Appears in collection : Michel Cristofol: Introduction on inverse problems

    Missing fields : cours diffusion

    Score: 13.140377
  • Collections (62)
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