ingleseENG
Direttore Vicario: Prof. Gabriele Grillo
Responsabile Gestionale: Dr.ssa Franca Di Censo

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Seminari Passati

  • Design and Health
    Stefano Capolongo , Politecnico di Milano
    mercoledì 18 marzo 2020 alle ore 12:15, aula B21
  • Comunicare la scienza: manuale di sopravvivenza
    Maurizio Melis , Giornalista scientifico
    mercoledì 11 marzo 2020 alle ore 12:15, aula B21
  • Bergman projections on pseudoconvex domains containing complex manifolds in their boundary
    Gian Maria Dall'Ara, School of Mathematics, University of Birmingham
    mercoledì 4 marzo 2020 alle ore 10:45, aula seminari - 3° piano
  • CANCELLED - this event has been cancelled
    Wolfgang Bangerth, Department of Mathematics, Campus Delivery, Fort Collins, CO, USA NUMETH-HPC
    venerdì 28 febbraio 2020 alle ore 14:00, Aula Saleri VI piano
    ABSTRACT
    CANCELLED
  • Modeling and simulation of thermo-poroelastic processes in fractured geothermal reservoirs
    Eirik Keilegavlen, Department of Mathematics, University of Bergen, Norway
    giovedì 20 febbraio 2020 alle ore 11:30, Aula Saleri - VI piano
    ABSTRACT
    We present a mathematical model for coupled thermo-hydro-mechanical processes in fractured porous media, motivated by applications to geothermal energy. The model is based on a mixed-dimensional representation of the host medium and fracture network. The dynamics in the host medium is governed by fully-coupled thermo-poroelasticity, while flow and energy transport can also take place in the fracture network. Fracture deformation, including opening and sliding, is modeled using techniques from contact mechanics. We present a finite volume approach for the mixed-dimensional model, combined with a primal-dual active set strategy for the contact problem.

    Contatto: luca.formaggia@polimi.it
  • Bail-in vs bail-out: Bank resolution and liability structure
    Alessandro Sbuelz, Università Cattolica (Milano)
    martedì 18 febbraio 2020 alle ore 12:00, Aula Consiglio
    ABSTRACT
    What is the joint impact of different resolution regimes and capital requirements on the optimal liability structure of a bank holding insured deposits and issuing non-bailinable debt and bail-inable Tier1-capital debt? We address this novel question and find that: 1) a credible bail-in resolution regime rules out extreme leverage and creates value by postponing default; 2) a positive probability of bail-out destroys credibility with dramatic effects on financial risk-taking, to the point of reversing the classical positive link between optimal leverage and growth prospects; and 3) a strict enforcement of the Basel III CET1 capital requirement strongly mitigates the impact of a non-credible resolution regime.
  • Kalman Filters for PDEs, a new hope
    Philppe Moireau, INRIA et Ecole Polytechnique, Paris, France
    lunedì 17 febbraio 2020 alle ore 16:00, Aula Saleri, VI piano
    ABSTRACT
    Kalman filters for PDEs is an old topic which is theoretically seducing but leads to a so-called curse of dimensionality in its numerical implementation. In order to circumvent this curse of dimensionality, it is now classical to base the numerical strategies on reduced order modeling. This raises the question of the accuracy of the resulting estimator.
    Alternatives approaches based on reduced-basis decomposition of the covariance were also developed in the past years, but here with an additional question of stability of the resulting estimator.
    Using H-matrix based discretization strategies, a recent numerical tool developed for integral equations discretization, we here show how a full Kalman estimator can now be envisioned PDE models and their associated large discretization, hence freshening up the interest for this old theory.


    Contatto: luca.dede@polimi.it
  • Entropy-Transport distances between measures and metric measure spaces
    Nicolò De Ponti, Università degli Studi di Pavia
    martedì 11 febbraio 2020 alle ore 15:15, Aula seminari 3° piano
    ABSTRACT
    After providing the necessary background material, we describe a class of distances coming from optimal Entropy-Transport problems, a recent generalization of optimal transport where also creation and destruction of mass is taken into account.
    Inspired by previous work of Gromov and Sturm, we then use these metrics to construct new meaningful distances between metric measure spaces with finite mass.
    This talk is based on a joint collaboration with Andrea Mondino and Giuseppe Savaré.