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.
Per consultare la pagina di tutti i seminari di Dipartimento Click here.
Settimana 31/04/2025 - 04/04/2025
Seminari
Nel link sottostante trovate la Newsletter n.4 del progetto di Dipartimento MatMod@TOV, con l'invito di leggerla e a darne massima diffusione:
Click below for PDF file Download:
NEWSLETTER n.4
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
DocTorV SEMINAR
Date: 04th April 2025
Schedule: 14:30 - Rome Time
Where: Conference Room "C. D'Antoni "
Title: " Vision and Language for Video Understanding "
Speaker: Benedetta Liberatori - University of Trento
Abstract:
The development of large multimodal deep learning models capable of learning joint representations of
visual and textual information has led to unprecedented results in many image comprehension tasks.
Despite their relative simplicity, these vision and language models (VLMs) have demonstrated remarkable generalization abilities.
Although models like CLIP were initially developed to operate on images, VLMs have recently been successfully extended to the video domain as well. However, understanding videos is more complex than comprehending images. Videos generally contain more visual information and include a temporal dimension, which adds an extra layer of difficulty. This temporal dimension makes automated video understanding particularly challenging. Nevertheless, the multimodal approach has enabled significant progress in complex problems such as video classification, anomaly detection, and temporal action localization. Research in this area aims for an increasingly deep and detailed understanding of videos, which, being the form of
data closest to our way of perceiving the world in both space and time, play a central role in numerous applications.
Organizing Committee:
Arianna Vicari (mail to contact)
Andrea Pizzi (mail to contact)
Further Info and Program: For information contact to Arianna Vicari or Andrea Pizzi directly by E-mail.
Streaming Link (MS Teams): This seminar will be held in person
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
Operator Algebra Seminar
Date: 01 April 2025
Schedule: 16:00 - Rome Time -
Where: Conference Room 1201 "R. Dal Passo "
Title: "Gravity from entropy "
Speaker: Ginestra Bianconi - Queen Mary University of London
Abstract:
Gravity is derived from an entropic action coupling matter fields with geometry.
The fundamental idea is to relate the metric of Lorentzian spacetime to a quantum operator,
playing the role of an renormalizable effective density matrix and to describe the matter fields topologically,
according to a Dirac-Kähler formalism, as the direct sum of a 0-form, a 1-form and a 2-form.
While the geometry of spacetime is defined by its metric, the matter fields can be used to define an alternative metric,
the metric induced by the matter fields, which geometrically describes the interplay between spacetime and matter.
The proposed entropic action is the quantum relative entropy between the metric of spacetime and the metric induced
by the matter fields. The modified Einstein equations obtained from this action reduce to the Einstein equations with
zero cosmological constant in the regime of low coupling. By introducing the G-field, which acts as a set of Lagrangian
multipliers, the proposed entropic action reduces to a dressed Einstein-Hilbert action with an emergent small and positive
cosmological constant only dependent on the G-field. The obtained equations of modified gravity remain second order in the
metric and in the G-field. A canonical quantization of this field theory could bring new insights into quantum gravity while
further research might clarify the role that the G-field could have for dark matter.
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
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
DIFFERENTIAL EQUATIONS SEMINAR
Date: 01th April 2025
Schedule: 14:30 - Rome Time -
Where: Conference Room "R. Dal Passo "
Title: " Trade-off Invariance Principle for regularized functionals "
Speaker: Alessandro Scagliotti - Technical University of Munich
Abstract:
When minimizing a regularized functional - i.e., one of the form $H(u) = F(u) + \alpha G(u)$, where $G$ is a regularization term and $\alpha$ is the regularization parameter - one generally expects multiple minimizers to exist; one might furthermore expect the term $G$ to assume different values in correspondence of different minimizers. We show, however, that for most choices of the parameter $\alpha$, all minimizers of the regularized functional share the same value of $G$. This holds without requiring any assumptions on the domain nor on the smoothness/convexity properties of the involved functionals.
We also prove a stronger result concerning the invariance of the limit of $G$ along minimizing sequences.
Moreover, we demonstrate how these findings extend to multi-regularized functionals and -
when an underlying differentiable structure is present- to critical points.
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:
Riccardo Molle (mail to contact)
Alfonso Sorrentino (mail to contact)
Further Info and Program: Click here
Streaming Link (MS Teams): This seminar will be held in person
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
Ro.Ma.D.S. - Rome Centre on Mathematics for Modelling and Data ScienceS Seminar
Date: Mini Course: 31/03/2025
Schedule: 14:00 Rome Time
Where:Conference Room: "R. Dal Passo" 1201
Title: " Basics of Natural Language Processing and applications of Large Language Models "
Speaker: Francesco Preta- Stip AI, Berkeley
Abstract:
This seminar provides an introduction to Natural Language Processing (NLP), covering fundamental concepts such as tokenization,
Named Entity Recognition (NER), and sentiment analysis. We will show how many NLP tasks can be translated into regular data science problem through the use of embeddings and introduce different embedding strategies
for words and sentences obtained at different stages of history. Finally, we will explore the current industrial applications of Large
Language Models (LLMs) including prompt engineering strategies, RAG and chatbots. Attendees will gain insights into how LLMs work, their advantages, and real-world use cases.
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:
Domenico Marinucci contact Mail
Michele Salvi contact Mail
Stefano Vigogna contact Mail
Further Info and Program: Click here for RoMaDS event Page
Streaming Link (MS Teams): Link TEAMS Click here for Link
Further Info and Program: Click here for RoMaDS event Page
Streaming Link (MS Teams): Link TEAMS Click here for Link
Eventi
Il Dipartimento di Matematica ospita la mostra: "Émile Borel. Un matematico plurale" (in collaborazione con l'Institut Henri Poincaré)
Il periodo è: 17 marzo al 11 aprile 2025;
La mostra è stata organizzata da: Prof. Riccardo Bellé, Prof. Benedetto Scoppola, Prof.ssa Francesca Tovena.