Bollettino settimanale
Settimana 23/01/2022 - 27/01/2022
Seminari
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
DIFFERENTIAL EQUATIONS SEMINAR
Date: Tuesday 24 January 2023
Schedule: 16:00 - Rome Time
Where: Conference Room 1201 - "R. Dal Passo"
Title: " Il paradosso del piano tangente e il rapporto incrementale vettoriale di un piano secante "
Speaker: Paolo Roselli (Università di Roma "Tor Vergata")
Abstract: La retta tangente il grafico di una funzione
sufficientemente regolare è la posizione limite di rette secanti il grafico. Ci si aspetterebbe
che il piano tangente il grafico di una funzione a due variabili sufficientemente regolare
sia la posizione limite di piani secanti il grafico in tre punti non collineari (a,f(a)), (b,f(b)) e (c,f(c)),
ma così non è. Questo fenomeno paradossale è una versione locale del paradosso dell'area di una superficie curva
(detto anche paradosso di Schwarz).
In questo seminario visualizzerò il fenomeno paradossale, e mostrerò come il
"coefficiente angolare vettoriale" di un piano secante possa esprimersi sia come combinazione vettoriale
delle normali esterne al triangolo di vertici a, b e c, sia come rapporto vettoriale incrementale, quando
il prodotto vettoriale è quello geometrico di Clifford. Se rimarrà tempo, accennerò anche a come modificare
tale rapporto incrementale vettoriale per renderlo sempre convergente al gradiente di f.
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
Geometry Seminar
Date: 24th of January 2023
Schedule: 14:30 Rome Time
Where: Conference Room 1201 "Roberta Dal Passo"
Speaker: Antonio Trusiani (Institut de Mathématiques de Toulouse)
Title: " A relative Yau-Tian-Donaldson conjecture and stability thresholds"
Abstract:
In the first part of the talk the set of Kähler-Einstein metrics with prescribed
singularities and a new relative K-stability notion will be introduced.
A particular focus will be given to the motivations and intuitions,
making a comparison with the log K-stability/log Kähler-Einstein metrics.
The two notions mentioned above will then be related to each other through
a Yau-Tian-Donaldson correspondence, which will be the core of the talk.
An important role will be played by a valuative criterion, which can be
also used to relate the prescribed singularities setting to the absolute setting.
Indeed new estimates on the Fujita-Odaka δ-invariant and new information on the genuine K-stability will be deduced. Time permitting, a further discussion on some future developments will conclude the talk.
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): This seminar will be held in person
Università degli Studi Roma Tor Vergata
Dipartimento di Matematica
Operator Algebra Seminar
Date: 25 January 2023
Schedule: 16:00 Rome Time
Where: Conference Room 1201 "Roberta Dal Passo"
Speaker: Roberto Conti (Sapienza University of Rome)
Title: " Heat properties for groups "
Abstract: Somewhat motivated by the original approach of J.-B. Fourier to solve the heat equation on a bounded domain, we formulate some new properties of countable discrete groups involving certain completely positive multipliers of the reduced group C*-algebra and norm-convergence of Fourier series. The stronger "heat property" implies the Haagerup property, while the "weak heat property" is satisfied by a much larger class of groups. Examples will be provided to illustrate the various aspects. In perspective, a challenging goal would be to obtain yet another characterization of groups with Kazhdan's property (T). (Based on joint work with E. Bédos.)
Organizing Committee:
Roberto Longo (University of Rome Tor Vergata and Director of C.M.T.P.)
Vincenzo Morinelli (University of Rome Tor Vergata)
Daniele Guido (University of Rome Tor Vergata)
Further Information: Click here for website
NOTE: For more information contact: Vincenzo Morinelli
Streaming Link (MS Teams): This seminar will be held in person
Eventi
Università degli Studi di Roma "Tor Vergata"
Dipartimento di Matematica
Corso di Dottorato
Reading course on Birational Geometry
Period: 2023.10.01 - 2023.06.06
Schedule:
| Day | Time and Room |
|---|---|
| 2023.10.01 | h:14:30/15:30 Conference Room 1103 "F.DE Blasi" |
| 2023.17.01 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.17.01 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.24.01 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.31.01 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.17.02 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.07.02 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.14.02 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.21.02 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.28.02 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.07.03 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.14.03 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.21.03 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.28.03 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.04.04 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.11.04 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.18.04 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.02.05 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.09.05 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.16.05 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.23.05 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.30.05 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |
| 2023.06.06 | h: 11:00/13:00 Conference Room 1103 "F.DE Blasi" |