Bollettino settimanale
Pagina d'informazione di seminari ed eventi scientifici che avranno luogo settimanalmente per lo più in area romana.
Per la pubblicazione rivolgersi a Giorgio Chiarati che ne cura la gestione.
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Settimana 22/09/2025 - 26/09/2025
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:
Click below for PDF file Download:
NEWSLETTER n.5
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
Geometry Seminar
Date: 19th September 2025
Schedule: 14:30 Rome Time
Where: Conference Room 1101 "C. D'Antoni"
Speaker: Johannes Rau - Universidad de Los Andes, Bogotà
Title: " Counting rational curves over any field "
Abstract:
An important problem in enumerative geometry is counting rational curves that interpolate a configuration of points on an algebraic surface. Over the complex numbers, the answer does not depend on the configuration of points and is called the Gromov-Witten invariant. In contrast, over the real numbers, this invariance fails. To recover it, Welschinger invented an “sign” rule that gives rise to Welschinger invariants. Recently, Kass, Levine, Solomon, and Wickelgren constructed an invariant over an (almost) arbitrary field. The small “inconvenience” is that these latter invariants are no longer numbers, but quadratic forms. In a current work with Erwan Brugallé and Kirsten Wickelgren,
we establish direct relationships between these different types of invariants. In my talk, I want to give an introduction to this topic.
Note: This talk is part of the activity of the MIUR Department of Excellence Project MatMod@TOV (2023-2027), Prin 2022 Moduli Spaces and Birational Geometry and Prin PNRR 2022 Mathematical Primitives for Post Quantum Digital Signatures
Organizing Committee:
Codogni Giulio (Contact Mail)
Lido Guido Maria ( Contact Mail)
Francesca Carocci ( Contact Mail)
Further Information: Click here for geometry webpage
Streaming Link (MS Teams): This seminar will be held in person
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
Operator Algebra Seminar
Date: 24th September 2025
Schedule:
Seminar 1 - 16:00 - Rome Time -
Seminar 2 - 17:15 - Rome Time -
Where: Conference Room 1201" R. Dal Passo "
SEMINAR 1 - h: 16:00
Title:" Inverse hamiltonian reduction in VOA representation theory "
Speaker: Christopher Raymond - University of Hamburg
Abstract:
Recent interest in vertex operator algebra theory has focused
on examples whose representation theory describes conformal field theories
with logarithmic divergences in their correlation functions (logCFTs).
These VOAs admit non-semisimple representations that play a key role in the
CFT, and additionally often feature infinitely many simple representations.
A large class of examples of such VOAs are W-algebras associated to affine
VOAs at fractional admissible level. However, representations for these
VOAs are notoriously difficult to construct in a general way. One approach
to solving this problem is known as inverse quantum hamiltonian reduction
(IQHR). The aim of this talk will be to introduce the ideas behind IQHR in
some accessible examples, and then discuss generalisations.
Note: This talk is part of the activity of the MUR Excellence Department
Project MatMod@TOV (CUP E83C23000330006)
SEMINAR 2 - h: 17:15
Title:" Channel divergences and complexity in algebraic QFT "
Speaker: Stefan Hollands - niversity of Leipzig
Abstract:
T.B.A.
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: 25th September 2025
Schedule: 14:30 - Rome Time
Where: Conference Room "C. D'Antoni "
Title: " "
Speaker: Rotem Assouline - Institut de Mathématiques de Jussieu - Paris Gauche
Abstract:
In this talk, we will demonstrate how the celebrated
connection between Ricci curvature, optimal transport, and geometric
inequalities such as the Brunn-Minkowski inequality, extends to the setting
of general Lagrangians on weighted manifolds. As applications, we will
state a generalization of the horocyclic Brunn-Minkowski inequality to
complex hyperbolic space of arbitrary dimension, and a new Brunn-Minkowski
inequality for contact magnetic geodesics on odd-dimensional spheres. The
main technical tool is a generalization of Klartag's needle decomposition
technique to the Lagrangian setting.
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 11th April 2025
Schedule:
FIRST SEMINAR 14:30 Rome Time
SECOND SEMINAR 16:00 Rome Time
Where: Conference 1201 - Room Dal Passo
FIRST SEMINAR 14:30 Rome Time
Speaker: Alberto Avitabile - Università degli studi di Roma Tor Vergata
Title: " E∞-algebra structure on singular cochains "
Abstract:
ISingular cohomology of a space carries a natural CDGA structure induced by cup product at the level of cochains.
While cup product is a well-defined operation on singular cochains, commutativity only holds after passing to cohomology, due to the presence of non-trivial Steenrod operations. This fact will be the motivating example for introducing E∞-algebras and to explain how the E∞-structure on cochains encodes this phenomenon in a precise way. Since the theory of E∞-algebras needs the notion of operad, general recollections on the basics of operad theory will be provided.
Note: this talk is part of the activity of the MIUR Excellence Department Project MatMod@TOV (CUP E83C23000330006).
SECOND SEMINAR 16:00 Rome Time
Speaker: Francesca Paganelli - Sapienza Università di Roma
Title: " Quantum cluster algebras and representations of shifted quantum affine algebras "
Abstract:
Shifted quantum affine algebras are quantum groups parameterized by a coweight of the underlying Lie algebra. In 2022, Hernandez introduced a category O of representations of these algebras, and in 2024, Geiss–Hernandez–Leclerc proved that the Grothendieck ring of this category O admits a cluster algebra structure. In this talk, after introducing the necessary background, I will explain how to construct a quantization of this cluster algebra, leading to a definition of the quantum Grothendieck ring for category O.
If time permits, I will also discuss some applications and directions for future research
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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