We consider a family of processes obtained by randomly splitting the deterministic flows associated to some fluid models (e.g. Lorenz 96, Galerkin-Naver-Stokes). These split dynamics allow to separate the conservative and dissipative part of the…
Eventi
Structure-preserving dynamical model order reduction of parametric Hamiltonian systems – Cecilia Pagliantini (TU Eindhoven)
In real-time and many-query simulations of parametric differential equations, computational methods need to face high computational costs to provide sufficiently accurate and stable numerical solutions. To address this issue, model order reduction…
A variational approach to a class of nonlinear Cauchy-Neumann problems – Alessandro Audrito (ETH Zurich)
In this talk, I will present some recent results about existence and Holder regularity of weak solutions to a class of nonlinear Cauchy-Neumann problems arising in combustion theory and fractional diffusion. Weak solutions are obtained through a…
Partial and global representations of finite groups – Michele D’Adderio (Université Libre de Bruxelles, Belgium)
The notions of partial actions and partial representations have been extensively studied in several algebraic contexts in the last 25 years. In this talk, we introduce these concepts and give a short overview of the results known for finite groups.…
Alcuni risultati di confronto per soluzioni di problemi ellittici con dati al bordo di tipo misto – Cristina Trombetti (Università degli Studi di Napoli Federico IIi Federico II)
I risultati di confronto alla Talenti per soluzioni di problemi ellittici con dati al bordo di tipo Dirichet e Neumann sono stati ampiamente affrontati negli ultimi decenni. In questo seminario si affronta il problema di come ottenere risultati…
Computation of generalized matrix functions with rational Krylov methods – Igor Simunec (Scuola Normale Superiore)
Venue: Aula Magna, Dipartimento di Matematica. Generalized matrix functions [3] are an extension of the notion of standard matrix functions to rectangular matrices, defined using the singular value decomposition instead of an eigenvalue…
Seminario MAP – From PDE’s to Geometry: a new path towards the Minkowski Inequality – Luca Benatti (Università di Trento)
Title: From PDE’s to Geometry: a new path towards the Minkowski Inequality Abstract: The classical Minkowski inequality in Euclidean Spaces establishes a sharp lower bound for the total mean curvature of the boundary in terms of its area. This talk…
Archimedean height pairings for higher cycles – Gregory Pearlstein (Università di Pisa)
By the work of Richard Hain, the archimedean height pairing on ordinary algebraic cycles can be interpreted as an invariant of an associated mixed Hodge structure. In this talk, we will present a similar construction for higher cycles in the Bloch…
Ricci curvature, graphs and Coxeter groups – Viola Siconolfi (Università di Pisa, Italy)
I will talk about a notion of curvature for graphs introduced by Schmuckenschläger which is defined as an analogue of Ricci curvature. This quantity can be computed explicitly for various graphs and allows to find bounds on the spectral gap of the…