Bollettino settimanale
Settimana 03/10/2022 - 07/10/2022
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: 04 October 2022
Schedule: 16:00 - Rome Time
Where: Conference Room "R. Dal Passo"
Title: " Stability estimates in some classical functional inequalities. "
Speaker: Lei Zhang (University of Florida, USA)
Abstract:
The singular Liouville equation is a class of second order elliptic partial differential equations defined in two dimensional spaces:
$$\Delta u+ H(x)e^{u}=4\pi \gamma \delta_0 $$
where $H$ is a positive function, $\gamma>-1$ is a constant and $\delta_0$ stands for a singular source placed at the origin. This deceptively simply looking
equation has a rich background in geometry, topology and Physics. In particular it interprets the Nirenberg problem in conformal geometry and is the reduction
of Toda systems in Lie Algebra, Algebraic Geometry and Gauge Theory. Even if we only focus on the analytical aspects of this equation, it has wonderful and surprising
features that attract generations of top mathematicians. The structure of solutions is particular intriguing when $\gamma$ is a positive integer. In this talk I will
report recent joint works with D’Aprile and Wei that give answers to some important issues of this equation. I will report the most recent results and consequences that
our results may lead to.
Nota: Questo seminario fa parte delle attività finanziate dal progetto MIUR Dipartimento d'eccellenza 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):
Questo seminario si terrà in presenza, ma lo speaker sarà connesso da remoto tramite MS Teams. Il link per connettersi al seminario da remoto potrà essere fornito su richiesta.
This seminar will be held in person, but the speaker will be connected remotely via MS Teams. The link to connect to the seminar remotely can be provided upon request.
Questo seminario si terrà in presenza, ma lo speaker sarà connesso da remoto tramite MS Teams. Il link per connettersi al seminario da remoto potrà essere fornito su richiesta.
This seminar will be held in person, but the speaker will be connected remotely via MS Teams. The link to connect to the seminar remotely can be provided upon request.
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
Geometry Seminar
Date: 04 October 2022
Schedule: 14:30 Rome Time
Where: Conference Room 1201 "Roberta Dal Passo"
Speaker: Davide Cesare Veniani (University of Stuttgartt)
Title: "Symplectic rigidity of O'Grady's manifolds"
Abstract: Mukai classified all symplectic groups of automorphisms of K3 surfaces as possible subgroups of one of the Mathieu
groups. Since then, the proof of Mukai's theorem has been simplified using lattice theoretical techniques, and
extended to higher dimensional hyperkähler manifolds. In two joint works with L. Giovenzana (Loughborough), A.
Grossi (Chemnitz) et C. Onorati (Roma Tor Vergata), we studied possible cohomological actions of symplectic
automorphisms of finite order on the two sporadic deformation types found by O'Grady in dimension 6 and 10. In
particular, we showed that, in dimension 10, all symplectic automorphisms are trivial. In my talk, I will explain
the connection between our proof and the sphere packing problem, which was recently solved by Fields medalist
Viazovska in dimension 8 and 24.
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
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
Operator Algebra seminar
Date: 05 October 2022
Schedule: 16:00 Rome Time
Where: Conference Room 1201 "Roberta Dal Passo"
Speaker: Detlev Buchholz (University of Göttingen)
Title: "Proper condensates and long range order"
Abstract: The usual characterization of Bose-Einstein condensates is based on spectral properties
of one-particle density matrices. (Onsager-Penrose criterion). The analysis of their specific properties, such as the occurrence
of long-range order between particles and peaks in momentum space densities requires, however, the transition to the thermodynamic
limit, where the one-particle density matrices are no longer defined. In the present talk, we will explain a new criterion of
"proper condensation" that allows us to establish the properties of bosonic systems occupying fixed bounded regions.
Instead of going to the idealization of an infinite volume, one goes to the limit of arbitrarily large densities in the given region.
The resulting concepts of regular and singular wave functions can then be used to study the properties of realistic finite bosonic systems,
the occurrence of condensates, and their large-distance behavior, with a precise control of accuracy.
Organizing Committee:
Roberto Longo (University of Rome Tor Vergata and Director of C.M.T.P.)
Vincenzo Morinelli (University of Rome Tor Vergata)
Giuseppe Ruzzi (University of Rome Tor Vergata)
Further Information: Click here for website
NOTE: For more information contact: Vincenzo Morinelli
Streaming Link (MS Teams): In Presence
Eventi