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

 Seminari

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Parola da cercare

Prossimi Seminari

  • Working with compositional data in coordinates
    Eva Fiserova, Palacky University Olomouc, Czech Republic
    mercoledì 21 novembre 2018 alle ore 14:30, aula Saleri VI piano
  • Illuminazione, visione e opere d’arte: il punto di vista del fisico
    Farini Alessandro, Istituto Nazionale di Ottica, CNR, Firenze
    mercoledì 21 novembre 2018 alle ore 15:00, Sala Consiglio VII piano
  • An overview of some mathematical and computational problems in Network Science
    Michele Benzi, Scuola Normale Superiore, Pisa
    giovedì 22 novembre 2018 alle ore 14:00,  Aula Consiglio VII Piano – Edificio 14, Dipartimento di Matematica POLITECNICO DI MILANO
  • BIRATIONAL EQUIVALENCE OF ALGEBRAIC VARIETIES
    Shigefumi Mori, Kyoto University Institute of Advanced Study
    lunedì 26 novembre 2018 alle ore 16:30, Aula Chisini, Diparimento di Matematica, Via C. Saldini 50
  • The Quantitative Alexandrov Theorem in Space forms
    Luigi Vezzoni, Università degli Studi di Torino
    martedì 27 novembre 2018 alle ore 15:15, Aula seminari 3° piano
  • First Principles Determination of Reaction Rates
    Carlo Cavallotti, Dipartimento di Chimica, Materiali e Ingegneria Chimica, “G. Natta”, Politecnico di Milano
    martedì 27 novembre 2018 alle ore 10:30, aula Saleri VI piano
  • Emodinamica della circolazione epatica: problemi e nuove acquisizioni
    Massimiliano Tuveri, Azienda Ospedaliera Universitaria Integrata, Verona, Italy
    giovedì 29 novembre 2018 alle ore 11:30, aula consiglio VII piano
  • Characterization of Attraction Domains for Generic Quantum Semigroups
    Damiano Poletti, Politecnico di Milano
    giovedì 29 novembre 2018 alle ore 14:30 precise, Aula Seminari III piano

Seminari Passati

  • Nonlinear scalar field equations with competing potentials
    Riccardo Molle, Università di Roma “Tor Vergata”
    martedì 17 aprile 2018 alle ore 15:15, Aula 6° piano
    ABSTRACT
    In this talk a class of nonlinear elliptic equations on R^N is presented. These equations come from physical problems, where a potential interacts with the bumps in the solutions. We first discuss the interactions and present some old and new results; then we consider competing potentials, showing in particular a theorem on the existence of infinitely many positive bound state solutions. Finally, we present some examples on existence/non existence of a ground state solution, when the theorem applies.
  • Mixed finite elements and adaptive schemes for eigenvalue problems
    Daniele Boffi, Dipartimento di Matematica “F. Casorati”, Università di Pavia
    giovedì 12 aprile 2018 alle ore 14:00, Aula Consiglio VII Piano – Edificio 14, Dipartimento di Matematica POLITECNICO DI MILANO
    ABSTRACT
    We review a posteriori error analysis and adaptive schemes for the approximation of eigenvalue problems arising from partial differential equations. Our ultimate goal is the design of adaptive schemes for the approximation of the eigenmodes associated with Maxwell’s equations. It is well known that the Maxwell eigenvalue problem can be analyzed with the help of suitable mixed formulations. Taking advantage of this remark, we can prove the convergence with optimal rate for the edge finite element approximation of the Maxwell eigenvalue problem. In
    three dimensions, the result is not a trivial extension of the analysis previously performed for the approximation of the Laplace eigenproblem in mixed form. Particular attention is paid to the case of multiple eigenvalues and clusters of eigenvalues.

    Contact: christian.vergara@polimi.it

  • Non-canonical embeddings and a canonical torsion-free covering for Mori Dream Spaces
    Michele Rossi, Università di Torino
    giovedì 12 aprile 2018 alle ore 14:30 precise, Aula seminari del terzo piano
    ABSTRACT
    The talk will be divided in two parts, approximately 45 minutes each; the first part is intended to be an introduction to the more technical second part; there will be a brief break between the two parts.
    In the first part of this talk I will recall a standard construction of an (almost)-canonical toric embedding of a (non-necessarily projective) Mori Dream Space (MDS), starting from its Cox ring. Moreover I will recall some notation about the GKZ-decomposition of the pseudo-effective and the moving cone of a MDS. In the second part we will see some obstruction to extending Hu-Keel birational geometric results to the non-projective setup. Then I will show how recent results, jointly obtained with L. Terracini for $\Q$-factorial complete toric varieties, can be easily extended to a general MDS, producing a projective embedding of every MDS of Picard number less than or equal to 2 and a canonical covering space, unramified in codimension 1, of a given MDS, which is still a MDS admitting a torsion-free class group.
    In principle, an application of such a covering construction is that the Cox ring of a MDS, which is in general graded over a class group with non trivial torsion part, could be described in terms of the Cox ring of its canonical covering, which is now graded over a torsion-free class group. This is a work in progress.

  • Cosa possono insegnarci i Bitcoin?
    Matteo Bedini, Numerix
    mercoledì 11 aprile 2018 alle ore 12:15, Politecnico di Milano Campus Bonardi Edificio14 aula B21
  • Nonlinear Schrödinger equations on branched structures: the role of topology in the existence of ground states
    Enrico Serra, Politecnico di Torino
    mercoledì 11 aprile 2018 alle ore 11:15, Aula seminari 3° piano
    ABSTRACT
    We describe some results on the existence or nonexistence of ground states of prescribed mass for the nonlinear Schrödinger equation on noncompact metric graphs. We will highlight the role played by the topology of the graph in all the existence results, in the cases of L^2 subcritical and critical power nonlinearity. In particular, in the critical case, a key role is played by a thorough analysis of the Gagliardo-Nirenberg inequalities on metric graphs and by estimates of their best constants. Most of the techniques are new and suited to the investigation of variational problems on metric graphs.
  • The Black-Litterman Model and Views from a Reverse Optimization Procedure: An Out-of-Sample Performance Evaluation
    Erindi Allaj, Università degli Studi di Firenze
    martedì 10 aprile 2018 alle ore 12:15 precise, Aula Seminari del Terzo Piano
    ABSTRACT
    The Black-Litterman (BL) model has been proposed as a valid solution to the problem of the estimation error in the parameter estimates of the Mean-Variance (MV) model. However, very little research has been done in order to facilitate the application of the BL model and to empirically test the performance of the BL model. The paper contributes to the existing literature by proposing an intuitive and easy application of the BL model. To this purpose, we suggest a novel approach to specify the investors views in the BL model. These views are derived by using a reverse optimization procedure similar to that used by the BL model in deriving the implied equilibrium expected excess returns. The second issue is addressed by empirically examining the out-of-sample performance of the BL model with respect to other asset allocation strategies. These strategies are given by the Sample MV (SMV), Minimum-Variance (MinV), Naive, Risk-Parity (RP), Capital Asset Pricing Model (CAPM), Strategic and the Bayesian strategy. In our empirical analysis, we also consider the reformulated BL model proposed by Allaj (2013) (BLEA model). Overall our results suggest that the BL model is a valid asset allocation strategy.
  • The Spatial Organisation of Early Southeast Asian Landscapes: New Perspectives from Lidar
    Damian Evans, École française d’Extrême-Orient
    mercoledì 28 marzo 2018 alle ore 12:15, Politecnico di Milano Campus Bonardi Edificio14 aula B21
  • Crescita, Instabilità e Asimmetrie nei Sistemi Economici
    Fabio Pammolli, Politecnico di Milano
    mercoledì 21 marzo 2018 alle ore 12:15, Politecnico di Milano Campus Bonardi Edificio14 aula B21