Sala Seminari (Dip. Matematica)

Matrices in companion rings and their Smith forms, with applications to group theory and algebraic topology

Relatore: 
Vanni Noferini

In group theory, various properties of the abelianization of a cyclically presented group can be deduced by the Smith normal form of an integer circulant matrix. Motivated by this fact, we present a number of results on the Smith form of matrices that are polynomials in the companion matrix of a polynomial with coefficients in a generic elementary divisor domain. Our tools are of purely matrix theoretical nature and I will present them from the point of view of a matrix theorist. However, they enable significant advances in pure algebra.

Data Seminario: 
Monday, March 25, 2019
Aula: 
Sala Seminari (Dip. Matematica)
Ora Fine: 
Saturday, January 1, 0000 - 11:00
Affiliazione: 
University of Essex and Aalto University
Ora Inizio: 
Saturday, January 1, 0000 - 10:00

White noise solutions for (m)SQG

Tipo Seminario: 
Relatore: 
Martin Saal

Abstract:
The inviscid surface quasigeostrophic equation (SQG) describes (roughly speaking) the temperature in a rapidly rotating stratified fluid which is transported by the velocity field. The velocity field is connected to the temperature via Riesz-transform, which are singular integral operators. It has applications in both meteorological and oceanic flows, while in mathematics it is often used as a toy model for the 3D Euler equations due to some structural similarities of these equations.

Data Seminario: 
Monday, March 25, 2019
Aula: 
Sala Seminari (Dip. Matematica)
Ora Fine: 
Saturday, January 1, 0000 - 16:00
Affiliazione: 
University of Darmstadt
Ora Inizio: 
Saturday, January 1, 0000 - 15:00

Contraction methods for a class of McKean-Vlasov (mean-field) SDEs with jumps

Tipo Seminario: 
Relatore: 
Stefano Pagliarani

Abstract:
We consider two prototype classes of McKean-Vlasov (mean-field) SDEs with
jumps.
In the first case, the coefficient is assumed to be affine in the
state-variable, only measurable in the law, and the dynamics allow for Lévy
jumps. We study the equivalent functional fixed-point equation for the
unknown time-dependent coefficients of the associated Markovian SDE. By
proving a contraction property for the functional map in a suitable normed
space, we infer existence and uniqueness results for the MK-V SDE, and

Data Seminario: 
Monday, March 25, 2019
Aula: 
Sala Seminari (Dip. Matematica)
Ora Fine: 
Saturday, January 1, 0000 - 15:00
Affiliazione: 
Università degli studi di Udine
Ora Inizio: 
Saturday, January 1, 0000 - 14:00

A degenerate reason why trivial is not always good

Relatore: 
Luigi Lunardon

A degenerate reason why trivial is not always good

 

 

Abstract: In this talk, we focus on degeneration of low dimensional Calabi-Yau varieties. All the mysterious words in this abstract will be explained.

 

Data Seminario: 
Thursday, March 21, 2019
Aula: 
Sala Seminari (Dip. Matematica)
Ora Fine: 
Saturday, January 1, 0000 - 15:30
Affiliazione: 
Imperial College London
Ora Inizio: 
Saturday, January 1, 0000 - 14:30

Sparse linearizations and (sparse) structured ell-ifications

Relatore: 
Carla Hernando

The talk is divided in two main parts. The first one is focused on
(generalized) companion pencils, which are strong linearizations and
they present a template involving no arithmetic operations at all. In
addition, we are mainly interested in sparse (generalized) companion
pencils and then, we determine the smallest number of nonzero entries of
a particular class of companion pencils. In the case of generalized
companion pencils, we should impose natural conditions on its entries.

Data Seminario: 
Monday, March 18, 2019
Aula: 
Sala Seminari (Dip. Matematica)
Ora Fine: 
Saturday, January 1, 0000 - 15:00
Affiliazione: 
Universidad Carlos III, Madrid
Ora Inizio: 
Saturday, January 1, 0000 - 14:00

Large Data Solutions for Fractional Higher Order Nonlinear Equations.

Relatore: 
Sandra Lucente

Large Data Solutions for Fractional Higher Order Nonlinear Equations.

Abstract:

Data Seminario: 
Thursday, April 4, 2019
Aula: 
Sala Seminari (Dip. Matematica)
Ora Fine: 
Saturday, January 1, 0000 - 17:00
Affiliazione: 
University of Bari
Ora Inizio: 
Saturday, January 1, 0000 - 16:00

Classificazione di Enriques delle superfici algebriche

Relatore: 
Federico Conti

Titolo: Classificazione di Enriques delle superfici algebriche

 

Prerequisiti: geometria algebrica di base e teoria dei fasci

 

Data Seminario: 
Thursday, March 14, 2019
Aula: 
Sala Seminari (Dip. Matematica)
Ora Fine: 
Saturday, January 1, 0000 - 15:30
Affiliazione: 
Università di Pisa
Ora Inizio: 
Saturday, January 1, 0000 - 14:30

Optimal transport between mutually singular measures

Relatore: 
Giuseppe Buttazzo
Abstract. We study the Wasserstein distance between two measures $\mu,\nu$ which are mutually singular. In particular, we are interested in minimization problems of the form $$W(\mu,{\cal A})=\inf\big\{W(\mu,\nu)\ :\ \nu\in{\cal A}\big\}$$
Data Seminario: 
Wednesday, March 20, 2019
Aula: 
Sala Seminari (Dip. Matematica)
Ora Fine: 
Saturday, January 1, 0000 - 18:00
Affiliazione: 
Universita' di Pisa
Ora Inizio: 
Saturday, January 1, 0000 - 17:00

corso di Letture "Fourier–Mukai transforms in Algebraic Geometry"

Nella prossima lezione studieremo alcuni dei risultati dell'articolo di
Bondal e Orlov che ci permettono di ricostruire una varietà liscia e
proiettiva con fascio (anti)canonico ampio dalla sua categoria derivata.

 

Data Seminario: 
Tuesday, March 5, 2019
Aula: 
Sala Seminari (Dip. Matematica)
Ora Inizio: 
Saturday, January 1, 0000 - 14:00
Ora Fine: 
Saturday, January 1, 0000 - 16:00

Pages

Subscribe to Sala Seminari (Dip. Matematica)