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Pagina d'informazione di seminari ed eventi scientifici che avranno luogo settimanalmente per lo più in area romana.
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Settimana 16/03/2025 - 20/03/2025
Seminari
Nel link sottostante trovate la Newsletter n.5 del progetto di Dipartimento MatMod@TOV, con l'invito di leggerla ed a darne massima diffusione:
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NEWSLETTER n.5
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
Operator Algebra Seminar
Date: 18th March 2026
Schedule: 16:00 - Rome Time
Where: Conference Room 1201" R. Dal Passo "
Title:" Paradoxical decompositions as the only solutions to locally finite conditions "
Speaker: Robert Simon - London School of Economics and Political Science
Abstract:
Assuming g_1, g_2, ..., g_k are measure preserving
transformations on a probability space X, we require that a function f
from X to a measurable space Y satisfies that f(x) is in F(x, f(g_1 x),
.... f(g_k x) ) almost everywhere for an upper semi continuous
correspondence F defined on X x Y^k. If there exists such functions
however NONE of them are measurable with respect to any finitely additive
extension of the probability measure for which the g_i are still measure
preserving, we say that the correspondence F is paradoxical. We demonstrate
some paradoxical correspondences that are also convex valued and nowhere
empty. We are curious if there are applications beyond optimization and
economics.
Note: This talk is part of the activity of the MUR Excellence Department Project MatMod@TOV (CUP E83C23000330006)
Organizing Committee:
Vincenzo Morinelli (mail to contact)
Roberto Longo (mail to contact)
Daniele Guido (mail to contact)
Giuseppe Ruzzi (mail to contact)
Sebastiano Carpi (mail to contact)
Further Info: Click here for Operator Algebras Seminar Page
Streaming Link (MS Teams): This seminar will be held in person
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Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
DINAMICS SYSTEMS SEMINAR
Date: 17 March 2026
Schedule:
14:30 - 15:30 Rome Time - First Seminar
15:30 - 16:00 Rome Time - coffe break
16:00 - 17:00 Rome Time - Second Seminar
Where: Conference Room 1201 "R. Dal Passo"
First Seminar h: 14:30 - 15:30
Title: " One Can Hear Symmetric Billiard Tables Close to Ellipses "
Speaker: Corentin Fierobe - Università degli Studi Roma Tor Vergata
Abstract:
This talk addresses Kac’s famous question, “Can one hear the
shape of a drum?”—that is, whether the spectrum of the Laplacian on a
domain uniquely determines its shape— in the context of convex planar
billiard tables. While non-convex counterexamples are known
(Gordon–Webb–Wolpert), the problem remains open for strictly convex domains
with smooth boundaries. As shown by Anderson, Melrose, and Guillemin, the
spectral question is deeply connected to its dynamical analogue: whether
the length spectrum—the set of lengths of all periodic billiard
trajectories—determines the domain up to isometry. In joint work with Vadim
Kaloshin and Alfonso Sorrentino, we show that this is indeed the case for
domains that are sufficiently close to a general ellipse and possess
dihedral symmetry.
Nota: Questo seminario fa parte delle attività finanziate dal progetto MIUR Dipartimento d'eccellenza MatMod@TOV (2023-27) CUP E83C23000330006
Note: This talk is part of the activity of the MIUR Excellence Department Project MatMod@TOV (2023-27) CUP E83C23000330006
Coffe Break - 15:30 - 16:00
First Seminar h: 16:00 - 17:00
Title: " Dynamics of Hénon-like maps "
Speaker: Fabrizo Bianchi - Università di Pisa
Abstract:
Hénon-like maps are invertible holomorphic maps, defined on some
convex bounded domain of $\mathbb C^k$, that have (non-uniform) expanding
behaviour in $p$ directions and contracting behaviour in the remaining
$k-p$ directions. They form a large class of dynamical systems in any
dimension. In dimension 2, they contain the Hénon maps, which are among the
most studied dynamical systems. In this talk, I will give an overview of
the main dynamical properties of these maps. In particular, I will focus on
how tools from pluripotential theory can allow one to go beyond the
algebraic setting of the Hénon maps. The talk is based on joint works with
Tien-Cuong Dinh and Karim Rakhimov.
Nota: Questo seminario fa parte delle attività finanziate dal progetto MIUR Dipartimento d'eccellenza MatMod@TOV (2023-27) CUP E83C23000330006
Note: This talk is part of the activity of the MIUR Excellence Department Project MatMod@TOV (2023-27) CUP E83C23000330006
Organizing Committee:
Leandro Arosio (mail to contact)
Filippo Bracci (mail to contact)
Olver J. Butterley (mail to contact)
Carlangelo Liverani (mail to contact)
Alfonso Sorrentino (mail to contact)
Further Info: Contact Alfonso Sorrentino (Mail )
Streaming Link (MS Teams): This seminar will be held in person
Università degli Studi di Roma "Tor Vergata"
Dipartimento di Matematica
Algebra and Representation Theory Seminar
Date: Friday 20 March 2026
Schedule:
FIRST SEMINAR 14:30 Rome Time
SECOND SEMINAR 16:00 Rome Time
Where: Conference Room 1201 - R. Dal Passo
FIRST SEMINAR 14:30 Rome Time
Speaker: Ben MILLS - York University
Title: "Utilising Meta Kazhdan-Lusztig Combinatoric"
Abstract:
Parabolic Kazhdan-Lusztig polynomials are ubiquitous across representation theory, geometry, and Lie theory.
This raises two questions: can the (often strictly combinatorial) methods used to compute them be enriched to
shed light on algebraic and geometric structures? Furthermore, if two a priori distinct structures are governed by the same polynomials,
does this imply a deeper equivalence?
In this talk, we address these questions for parabolic Kazhdan-Lusztig polynomials of
type (Dn , An-1) . By enriching the combinatorial methods to calculate these polynomials,
we give a new presentation of the structure for the basic algebra of the anti-spherical Hecke category of isotropic Grassmannians.
We then use this enriched structure to prove that it is isomorphic to the type D Khovanov arc algebra.
Note: this talk is part of the activity of the MIUR Excellence Department Project MatMod@TOV (CUP E83C23000330006).
SECOND SEMINAR 16:00 Rome Time - joint session with the "Topology Seminar" -
Speaker: Victor TURCHIN - Kansas State University
Title: " Graph-complexes and rational homotopy theory of embedding spaces"
Abstract:
The homotopy groups of CW complexes and of the mapping spaces between them are notoriously difficult to compute. However, if one disregards torsion, rational homotopy theory becomes very effective and can easily solve such problems. Moreover, it produces efficient invariants of homotopy classes of maps, called Maurer-Cartan elements, which encode the rational type of path components. I will give a couple of examples and then explain how this extends to embedding spaces.
Based on joint work with Benoit Fresse and Thomas Willwacher.
Note: this talk is part of the activity of the MIUR Excellence Department Project MatMod@TOV (CUP E83C23000330006).
Organizing Committee:
Fabio Gavarini (mail to)
Niels Kowalzig (mail to)
Martina Lanini (mail to)
Further Info: Click here for A.R.T.S. Webpage
Streaming Link (MS Teams): This seminar will be held in person
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