Bollettino settimanale
Settimana 10/10/2022 - 14/10/2022
Seminari
Università degli Studi Roma Roma Tre
Dipartimento di Matematica e Fisica
MINI-COURSE IN MATHEMATICAL PHYSICS - CONSTRUCTIVE RENORMALIZATION GROUP APPROACH TO LATTICE GAUGE THEORIES
Date: 03 - 14 October 2022
Schedule: h: 14:00 - 15:30 - Rome Time
Program
| Day | Period | Time |
|---|---|---|
| Monday | 2022.03.10 | h: 14:00 - 15:30 |
| Wednesday | 2022.05.10 | h: 14:00 - 15:30 |
| Friday | 2022.07.10 | h: 14:00 - 15:30 |
| Monday | 2022.10.10 | h: 14:00 - 15:30 |
| Wednesday | 2022.12.10 | h: 14:00 - 15:30 |
| Friday | 2022.14.10 | h: 14:00 - 15:30 |
Where: Conference Room "Aula M1" - Lungotevere Dante, 376 (Access also from L.go S. L. Murialdo 1)
Speaker: Jonathan Dimock (Univ. Buffalo NY U.S.A.)
Title: "The ultraviolet problem for QED in d=3"
Abstract: We review some recent work on quantum electrodynamics on a three
dimensional Euclidean spacetime, work which culminates in a proof of
ultraviolet stability in a finite volume. The model is formulated on a
fine lattice and bounds are obtained uniformly in the lattice spacing.
The method is a renormalization group technique due to Balaban. Topics
to be covered are (1.) Introduction, (2.) Block averaging for gauge
fields, (3.) Block averaging for Fermi fields, (4.) Random walk
expansions, (5.) Norms and polymer functions, (6.) Renormalization
group with bounded gauge fields, (7.) Renormalization, (8.) The full expansion.
Organizing Committee:
Alessandro Giuliani (Contact Mail)
Further Information: Click here for webpage
NOTE: For more information contact: Alessandro Giuliani Click here for mail
Streaming Link (MS Teams): In Presence
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
DIFFERENTIAL EQUATIONS SEMINAR
Date: Tuesday 11 October 2022
Schedule: 16:00 - Rome Time
Where: Conference Room "R. Dal Passo"
Title: " Critical points under the energy constraint "
Speaker: Gaetano Siciliano (University of Sao Paulo, IME-USP, Brazil)
Abstract: In the talk we discuss the existence of critical points for a family of abstract and smooth functionals on Banach spaces under the energy constraint.
By means of the Ljusternick-Schnirelmann theory and the fibering method of Pohozaev we show, under suitable assumptions, multiplicity results.
The abstract framework is then applied to some partial differential equations depending on a parameter for which we obtain multiple solutions as well as some bifurcation results.
Nota: Questo seminario fa parte delle attività finanziate dal progetto MIUR Dipartimento d'eccellenza MATH@TOV CUP E83C18000100006
N.B.: This talk is part of the activity of the MIUR Excellence Department Project MATH@TOV CUP E83C18000100006
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 di Roma "Tor Vergata"
Dipartimento di Matematica
Algebra and Representation Theory Seminar
Date: Friday, October 14th, 2022
Schedule: 16:00 Rome Time
Where: Conference Room 1201 “Roberta Dal Passo”
Speaker: Boris KRUGLIKOV (UiT / University of Tromsø)
Title: "Symmetries of supergeometries related to nonholonomic superdistributions"
Abstract: We extend the Tanaka theory to the context of supergeometry and obtain an upper bound on the supersymmetry dimension of geometric structures related to strongly regular bracket-generating distributions on supermanifolds and their structure reductions. Several examples will be demonstrated, including distributions with at most simple Lie superalgebras as maximum symmetry. The talk is based on joint works with Andrea Santi, Dennis The and Andreu Llabres.
Organizing Committee: Fabio Gavarini (mail to) - Martina Lanini (mail to)
Further Info: Click here for webpage
Streaming Link (MS Teams): In Presence
Università degli Studi di Roma "Tor Vergata"
Dipartimento di Matematica
Algebra and Representation Theory Seminar
Date: Friday 14th October, 2022
Schedule: 14:30 Rome Time
Where: Conference Room 1201 “Roberta Dal Passo”
Speaker: Guido PEZZINI ("Sapienza" Università di Roma)
Title: " Moment polytopes of spherical varieties and applications to multiplicity-free Hamiltonian manifolds "
Abstract: Spherical varieties are a generalization of toric, symmetric and flag varieties. T hey are also relevant in symplectic geometry, in particular in relation with multiplicity-free Hamiltonian manifolds. In this talk we will describe how the combinatorial structures arising in this theory can be used to characterize those multiplicity-free manifolds that admit a Kähler structure, in terms of their moment polytopes. This is a joint work with Bart Van Steirteghem.
Organizing Committee: Fabio Gavarini (mail to) - Martina Lanini (mail to)
Further Info: Click here
Streaming Link (MS Teams): In presence
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
Geometry Seminar
Date: 11 October 2022
Schedule: 14:30 Rome Time
Where: Conference Room 1201 "Roberta Dal Passo"
Speaker: Sid Mathur (University of Paris d'Orsay)
Title: "Searching for the impossible Azumaya algebra"
Abstract: In two 1968 seminars, Grothendieck used the framework of etale cohomology to extend the definition of the Brauer
group to all schemes. Over a field, the objects admit a well-known algebro-geometric description: they are
represented by \mathbb{P}^n-bundles (equivalently: Azumaya Algebras). Despite the utility and success of
Grothendieck's definition, an important foundational aspect remains open: is every cohomological Brauer class over a
scheme represented by a \mathbb{P}^n-bundle? It is not even known if smooth proper threefolds over the complex
numbers have enough Azumaya algebras! In this talk, I will outline a strategy to construct a Brauer class that cannot be represented by an Azumaya
algebra. Although the candidate is algebraic, the method will leave the category of schemes and use formal-analytic
line bundles to create Brauer classes. I will then explain a strange criterion for the existence of a corresponding
Azumaya Algebra. At the end, I will reveal the unexpected conclusion of the experiment.
Organizing Committee:
Codogni Giulio (Contact Mail)
Lido Guido Maria ( Contact Mail)
Onorati Claudio ( Contact Mail)
Further Information: Click here for geometry webpage
NOTE: For more information contact: Onorati Claudio Click here for mail
Streaming Link (MS Teams): In Presence
Eventi