Dipartimento di Matematica e Informatica

Seminario di Analisi: Conservation laws with point constraints on the flow (Rosini)

Foschi Damiano — 2014-11-18T09:55:50Z

Cari colleghi,

vi annuncio il seguente seminario:

Giovedi' 20 novembre 2014, ore 14.30
Aula 3, Dipartimento di Matematica e Informatica,
via Machiavelli 30

Massimiliano ROSINI (ICM, University of Warsaw-Polonia)
"Conservation laws with point constraints on the flow"

Tutti gli interessati sono invitati a partecipare. Cordiali saluti,

Michele Miranda.

"Exotic" constructions in Banach spaces - Kazimierz Goebel (University of Lublin)

Stumbo Fabio — 2017-11-06T17:54:51Z

Abstract:

It is obvious and well known fact that the geometry and topology of finite dimensional Banach spaces changes substantially when we pass to the case of infinite dimension. This is caused mainly by the fact that bounded and closed subsets of infinite dimensional space are, not necessarily compact. Especially all balls are not compact. In consequence of that, many classical theorems valid in finite dimensional spaces fail in this more general setting. Within the category of infinite dimensional Banach spaces, there are also differences caused by the regularity of geometries induced by the selection of the norm. In the talk we present a number examples related to fixed point theory and illustrating such situations.

Cremona transformations and the Sarkisov program

Rizzati Michele — 2020-01-09T14:13:10Z

Alberto Calabri
Title: Recent results on plane Cremona transformations
Abstract: The group of plane Cremona transformations is endowed with a natural topology and the set of maps of some bounded degree is closed. We will review some known properties of the quasi-projective variety which parametrizes plane Cremona maps of fixed degree. Then, we will address the question of determining which plane Cremona maps of small degree are limits of maps of higher degree. This talk is mainly based on joint works with Jérémy Blanc and with Cinzia Bisi and Massimiliano Mella.

Anne-Sophie Kaloghiros
Title: Volume preserving maps of Calabi-Yau pairs with a toric model
Abstract: A Calabi-Yau pair (X, D) consists of a normal projective variety X and a reduced integral divisor D with K_X + D = 0. A birational map (X, D_X ) ---> (Y, D_Y) between CY pairs is volume preserving if pullbacks of K_X + D_X and K_Y + D_Y to high enough models coincide.
The pair formed by a toric variety and its boundary divisor is an example of CY pair, and mutations of algebraic tori can be extended to volume preserving birational maps of toric pairs. In this talk, I will discuss a conjecture that states that every volume preserving birational map between CY pairs that have a toric model (i.e. that are volume preserving birational to toric pairs) is a chain of mutations. I will give some evidence in support of the conjecture in dimension three.

Giovanni Staglianò
Title: Kuznetsov's conjecture and rationality of cubic fourfolds
Abstract: We recall the main conjectures about the important classical problem (still unsolved) on the rationality of smooth cubic hypersurfaces in a 5-dimensional projective space, cubic fourfolds for short, and we present recent contributions in favor of these conjectures. We will also briefly illustrate similar conjectures and results for Gushel-Mukai fourfolds, that is for smooth quadric hypersurfaces in del Pezzo fivefolds. The talk is based on some joint works with Francesco Russo and the recent collaboration with Michael Hoff.

Seminario di Analisi: On extremizers for Fourier restriction inequalities (Diogo Oliveira e Silva)

Foschi Damiano — 2014-03-21T15:09:13Z

speaker: Diogo Oliveira e Silva (Hausdorff Center for mathematics - Bonn)

title: "On extremizers for Fourier restriction inequalities"

abstract:

This talk will focus on extremizers for a family of Fourier restriction inequalities on planar curves. It turns out that, depending on whether or not a certain geometric condition related to the curvature is satisfied, extremizing sequences of nonnegative functions may or may not have a subsequence which converges to an extremizer. We hope to describe the method of proof, which is of concentration compactness flavor, in some detail. Tools include bilinear estimates, a variational calculation, a modification of the usual method of stationary phase and several explicit computations.

Seminario di Analisi: Ipoellitticità C^\infty ed estensione di funzioni CR (Mauro Nacinovich)

Foschi Damiano — 2014-03-21T13:42:36Z

conferenziere: Prof. Mauro Nacinovich (Università di Roma Tor Vergata)

titolo: Ipoellitticita ed estensioni di funzioni CR.

abstract

seminario in videoconferenza: "The challenge of complexity in numerical simulations" (Alfio Quarteroni)

Foschi Damiano — 2014-03-21T12:52:07Z

videoconferenza in collegamento diretto dal Dipartimento di Matematica dell'Università di Padova

per i "Colloquia Patavina"

"The challenge of complexity in numerical simulations"

Prof. Alfio Quarteroni

ABSTRACT

The numerical solution of complex physical problems requires appropriate mathematical models and accurate numerical methods. Often the numerical problem is so large that devising computational reduction techniques, and developing efficient parallel algorithms by exploiting a dimensional reduction paradigm, becomes necessary. This presentation will address some of these issues and a few representative applications such as geodynamics, sports design and medicine, with a special focus on the complex interactions governing blood motion and artery wall deformation, and the interplay between electrical, mechanical and fluid-dynamical processes occurring in the heart.

Other information related to the talk can be found here: http://cmcs.epfl.ch/projects/alinghi

Specifica e verifica di proprietà di sistemi aperti per mezzo di logica computazionale - Marco Alberti (Università di Ferrara)

Stumbo Fabio — 2016-02-18T08:51:50Z

I sistemi aperti sono quelli in cui interagiscono componenti osservabili solo attraverso il loro comportamento e che perseguono interessi propri; sono stati oggetto di studi approfonditi nelle aree dei sistemi multi-agente, dei servizi web e dei sistemi normativi.

Fra le tecniche della logica computazionale, i linguaggi di programmazione logica abduttiva e a vincoli forniscono espressività sufficiente per specificare le proprietà di un'ampia classe di sistemi aperti, mentre le loro controparti operazionali, grazie alle proprietà di correttezza rispetto alle rispettive semantiche dichiarative, costituiscono un appropriato meccanismo di verifica.

Il seminario verterà su alcune applicazioni ed estensioni di queste tecniche per la specifica e verifica di sistemi aperti.

Two Algebra Talks by Prof. D. Stanovský

Rizzati Michele — 2016-01-11T14:17:23Z

On Tuesday the 12th of January, at 11 am, Aula 2, and on Wednesday the 13th of January, at 4 pm, Aula 2, Prof. David Stanovský, of the Charles University in Prague, will deliver two talks on the following subject:

Title: Selfdistributive quasigroups and quandles

Abstract: I will survey the theory of self-distributive quasigroups and place them into the modern framework of quandle theory. In the first part, I will review the classical theory of affine representations of medial, trimedial and distributive quasigroups, and show how it is used to obtain various properties of the quasigroups. In the second part, I will focus on quasigroups which are selfdistributive only from one side (also known as latin quandles), presenting two types of representations: an affine representation over a certain class of loops, and a homogeneous representations on cosets of groups. In the end, I can show how quandles are being used in knot theory to produce computable invariants.

Cremona contractibility - Sara Durighetto

Stumbo Fabio — 2018-12-19T09:05:59Z

Abstract: The plane Cremona group Cr2 is the group of birational automorphisms of P^{^2}.
From the half of the XIXth century the plane Cremona group has been studied
under many aspects. We say that a curve is contractible if it can be contracted to
a

Il paradosso di Condorcet

Rizzati Michele — 2023-03-02T15:46:50Z

L’evento è organizzato dalla Società Italiana di Storia delle Matematiche e dalla Mathesis di Ferrara.

Dopo l'introduzione della Presidente della Società Italiana di Storia delle Matematiche, Maria Teresa Borgato, seguiranno gli interventi di Maria Giulia Lugaresi, Iolanda Nagliati e degli studenti della classe IV U del Liceo Scientifico A. Roiti di Ferrara.

Sarà possibile seguire il seminario anche online collegandosi al seguente link: https://meet.google.com/duw-yvpv-uvk

Il programma

Formazione insegnanti

Rizzati Michele — 2023-12-06T10:09:25Z

L’Università di Ferrara istituisce i percorsi universitari di formazione iniziale e abilitazione dei docenti di posto comune (DPCM del 4 agosto 2023). In particolare, l'Università di Ferrara ha presentato al Ministero di competenza la richiesta di accreditamento dei percorsi in relazione a tutte e quattro le classi di concorso afferenti a matematica.

Per informazioni:

https://corsi.unife.it/matematica/studiare/formazione-insegnanti

https://www.unife.it/it/corsi/formazione-insegnanti/percorsi-formativi-abilitanti-60-cfu-per-la-scuola-secondaria

Categorical representability and birational geometry - Michele Bolognesi (Université de Montpellier)

Stumbo Fabio — 2019-02-13T16:16:44Z

Abstract: In this talk we will first survey some ideas concerning the construction of possible birational invariants from semiorthogonal decompositions of the derived category of coherent sheaves on a given variety X. We will then introduce categorical representability, and show how in several cases it can give interesting indications on the rationality of the base variety X. In particular we will devolop the case of varieties that are fibered in intersection of quadrics, for example fibrations in del Pezzo quartics.

Matematica oltre le discipline e i quadri orari - Emilio Ambrisi (Mathesis Nazionale)

Stumbo Fabio — 2017-11-09T10:22:31Z

Abstract:

Si affronteranno le questioni generali della filosofia dell’educazione e le tendenze attuali della didattica e della filosofia della matematica.

In particolare, si dirà dei sistemi scolastici sempre di più in sofferenza nel soddisfare l’ampiezza delle richieste educative e formative di cui sono oggetto.

Si parlerà quindi della tendenza a superare lo schema delle discipline e dei quadri orari e della dimensione meta-disciplinare assunta dalla matematica nelle proposte internazionali di ridisegno di un curricolo per lo studente del XXI secolo.

Il Prof. Ambrisi, Presidente dell’Associazione Nazionale Mathesis e direttore del Periodico di Matematiche, già ispettore tecnico del MIUR per il settore matematica e fisica nella scuola secondaria superiore, è autore di numerosi saggi e articoli sulla formazione degli insegnanti e la didattica della matematica.

La matematica nella modellizzazione dei fenomeni naturali

Rizzati Michele — 2022-11-15T10:16:49Z

Giovedì 17 novembre 2022, alle ore 17

nell'aula B3 al Palazzo Manfredini, in via L. Muratori 9 a Ferrara

avrà luogo la seduta accademica sul tema:

La matematica nella modellizzazione dei fenomeni naturali

Relatore prof. Vincenzo Coscia (Università di Ferrara).

Capacity and torsional rigidity: two measures of spectral stability

Rizzati Michele — 2023-03-15T08:06:55Z

In this talk, I will discuss the behavior of the spectrum of the Laplacian on bounded domains, subject to varying mixed boundary conditions. More precisely, let us assume the boundary of the domain to be split into two parts, on which homogeneous Neumann and Dirichlet boundary conditions are respectively prescribed; let us then assume that, alternately, one of these regions “disappears” and the other one tends to cover the whole boundary. In this framework, I will first describe under which conditions the eigenvalues of the mixed problem converge to the ones of the limit problem (where a single kind of boundary condition is imposed); then, I will sharply quantify the rate of this convergence by providing an explicit first-order asymptotic expansion of the “perturbed” eigenvalues. These results have been obtained in collaboration with L. Abatangelo, V. Felli and B. Noris.

Relatore: Roberto Ognibene (Università di Pisa)

Luogo: Aula C2 (Palazzo Manfredini)

Data e ora: Giovedì 23 Marzo 2023, ore 14.30