- Analysis-seminar - Mailing list — Dipartimento di Matematica, UniPI

Annuncio Convegno giovedì 27 novembre
by Luigi Forcella 21 Nov '25

21 Nov '25

Care tutte, cari tutti, Con la presente si annuncia il seguente convegno<https://cvgmt.sns.it/event/1067/>: "Un incontro di analisi e logica” che si terrà il pomeriggio di giovedì 27 novembre 2025 presso l'Aula magna del Dipartimento di Matematica, per l'occasione del pensionamento di VMT. Trovate il programma qui sotto. A presto, Luigi —— Dear all, We announce the following Analysis workshop<https://cvgmt.sns.it/event/1067/>: "Un incontro di analisi e logica”, during the afternoon of Thursday 27 Novembre 2025, in the Aula Magna of the Department of Mathematic, on the occasion of the retirement of VMT. Please find the program below. Best regards, Luigi —— PROGRAM: 15:15 - F. Honsell: Tba 15:30 - L. Ambrosio: Flussi lagrangiani regolari per campi con divergenza misura 16:10 - F. Flandoli: Correnti aleatorie 17:20 - A. Braides: Rappresentazione integrale (o sua mancanza) per funzionali dipendenti da integrali doppi 18:00 - M. Forti: Tba ----------- Luigi Forcella, Associate Professor University of Pisa Department of Mathematics Largo Bruno Pontecorvo 5 57127 Pisa, Italy https://pagine.dm.unipi.it/forcella/index.html

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Doppio seminario giovedì 13 novembre, dalle 17 alle 18.30
by Marco Ghimenti 12 Nov '25

12 Nov '25

Salve a tutti, vorrei ricordarvi domani un doppio seminario; alle 17.00 in aula seminari, Eleonora Cinti presenterà "An improved quantitative fractional isoperimetric inequality" alle 17.45, stessa aula, Matteo Talluri presenterà "On a fractional Lin–Ni-Takagi type problem with Neumann boundary conditions" Di seguito gli abstract Siete tutti invitati a partecipare A presto e grazie per l'attenzione Marco An improved quantitative fractional isoperimetric inequality We present an improved version of the quantitative fractional isoperimetric inequality, in which a stronger notion of asymmetry appears. In particular, we show that the square root of the isoperimetric deficit controls, not only the Fraenkel asymmetry, but also a sort of "oscillation of the boundary". In the classical local setting the analogue result was obtained by Fusco and Julin. This is a joint project with E. M. Merlino and B. Ruffini. On a fractional Lin–Ni-Takagi type problem with Neumann boundary conditions We explore a fractional version of a semilinear Neumann problem, introduced by Lin–Ni and Takagi in the ’80s, that arises from the steady states of the Keller–Segel model with non–local diffusion. We study the system under two different “non–local Neumann conditions”: spectral and integral. While spectral conditions admit a Caffarelli-Silvestre type extension theorem, integral conditions do not. This absence makes it more difficult to obtain Liouville–type theorems and to show the non existence of non–trivial positive solutions. Based on a joint project with Eleonora Cinti.

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seminario Cherkashin mercoledì ore 15
by Emanuele Paolini 20 Oct '25

20 Oct '25

Cari tutti, vi comunico che mercoledì (dopodomani) ore 17 in sala riunioni ci sarà il seminario di Danila Cherkashin (Bulgarian Academy of Sciences) dal titolo: "Steiner & Gilbert-Steiner Problems". Ovviamente siete tutti invitati a partecipare. E. (per chi aveva visto l'annuncio sul sito del dipartimento ho spostato l'orario dalle 15 alle 17 per via del consiglio di dipartimento).

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Geometric Analysis seminar: NICOLA GIGLI, 22 ottobre
by Alessandra Pluda 19 Oct '25

19 Oct '25

Dear all, We are pleased to announce a SNS-UNIPI Geometric Analysis seminar. On Wednesday, October 22nd, 2025, at 2 pm in the Sala Conferenze at PUTEANO, we will have the pleasure of listening to NICOLA GIGLI (SISSA), who will hold a double seminar: the first hour will be more basic and accessible to everyone, and the second hour will be more specialized. Title: Trading linearity for ellipticity - a novel approach to global Lorentzian geometry Abstract: The concepts of Sobolev functions, elliptic operators and Banach spaces are central in modern geometric analysis. In the setting of Lorentzian geometry, however, unless one restricts the attention to Cauchy hypersurfaces these do not have a clear analogue, due to the signature of the metric tensor. Aim of the talk is to discuss some recent observations in this direction centered around the fact that for $p<1$ the $p$-D’Alambertian is elliptic on the space of time functions. The talk is mostly based on joint project with Beran, Braun, Calisti, McCann, Ohanyan, Rott, Saemann. In the second part of the talk I will dig down into the concept of `hyperbolic Banach space’, extracted from an upcoming work of mine. --------------------------------------------------------------------------------------------------------- Best, Alessandra

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Annuncio seminario Analisi - giovedì 09 ottobre
by Luigi Forcella 02 Oct '25

02 Oct '25

Care tutte, cari tutti, Con la presente si annuncia il seguente seminario di Analisi: GIOVEDì 09 OTTOBRE 2025, ore 16 in AULA RIUNIONI del Dipartimento, avremo il piacere di ascoltare ALICE MARVEGGIO (U. BONN), che terrà un seminario<https://www.dm.unipi.it/en/seminar/?id=68c02f248ecc6e0c5ede7ca8> dal titolo "The Verigin problem with phase transition as gradient flow". Trovate l'abstract qui sotto. A presto, Luigi ————————————————— Dear all, We announce the following Analysis seminar: on THURSDAY 09 OCTOBER 2025, 4pm in AULA RIUNIONI of the Dept. of Math., we will have the pleasure of listening to ALICE MARVEGGIO (U. BONN). The title of the talk<https://www.dm.unipi.it/en/seminar/?id=68c02f248ecc6e0c5ede7ca8> is "The Verigin problem with phase transition as gradient flow". Please find the abstract below. Best regards, Luigi Speaker: Alice Marveggio (Bonn) Title: The Verigin problem with phase transition as gradient flow Abstract: We study the modeling of a compressible two-phase flow in a porous medium. The governing PDE system is known as the Verigin problem with phase transition, which is the compressible analog to the Muskat problem. Our aim is to prove the convergence of an implicit time discretization scheme using the Wasserstein distance, obtaining distributional solutions in the limit that satisfy an optimal energy-dissipation rate. This talk is based on a joint work with Anna Kubin and Tim Laux.

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Seminar by Michele Coti Zelati (Imperial)
by Luigi Forcella 18 Sep '25

18 Sep '25

Dear all, I forward the following announcement from the Probability research group, which is interesting also for people working in Math Analysis in general. Info below. The seminar<https://www.dm.unipi.it/en/seminar/?id=68c88256fc368dd2a765119c> will take place on THURSDAY, 25.09.2025 at 09:00 CEST in Aula N1, Polo Fibonacci, UNIPI and streamed online at this link: https://meet.google.com/gji-phwo-vbg Best regards, Luigi Speaker: Michele Coti Zelati (Imperial College London) Title: Alpha-unstable flows and the fast dynamo problem Abstract: The fast dynamo problem concerns the generation and maintenance of magnetic fields by fluid motion through the process of electromagnetic induction. In passive vector advection, this can be formulated as the exponential growth of the magnetic energy, at a resistivity-independent rate. In this talk, I will provide a construction of a Lipschitz, divergence-free and time-independent velocity field that is a fast dynamo on the whole space.

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Seminario venerdì 23 maggio - Dorin Bucur
by Luigi Forcella 20 May '25

20 May '25

Care tutte, cari tutti, per il prossimo evento del ciclo dei Seminari di Analisi, venerdì 23 Maggio alle ore 16 in Aula Riunioni, avremo il piacere di ascoltare Dorin Bucur (Université de Savoie Mont Blanc), che terrà un seminario<https://www.dm.unipi.it/en/seminar/?id=67ee42f620d73a92fb7ed141> dal titolo “On polygonal nonlocal isoperimetric inequalities: Hardy-Littlewood, Riesz, Faber-Krahn”. Trovate l'abstract qui sotto. A presto, Luigi Forcella ————————————————— Dear all, on Friday May 23rd at 4PM in Aula Riunioni, for the Mathematical Analysis Seminar, we will have the pleasure of listening to Dorin Bucur (Université de Savoie Mont Blanc). The title of the talk<https://www.dm.unipi.it/en/seminar/?id=67ee42f620d73a92fb7ed141> is “On polygonal nonlocal isoperimetric inequalities: Hardy-Littlewood, Riesz, Faber-Krahn". Please find the abstract below. See you soon, Luigi Forcella ----------------------------------- Speaker: Dorin Bucur (Université de Savoie Mont Blanc) Title: On polygonal nonlocal isoperimetric inequalities: Hardy-Littlewood, Riesz, Faber-Krahn Abstract: The starting point is the Faber-Krahn inequality on the first eigenvalue of the Dirichlet Laplacian. Many refinements were obtained in the last years, mainly due to the use of recent techniques based on the analysis of vectorial free boundary problems. It turns out that the polygonal version of this inequality, very easy to state, is extremely hard to prove and remains open since 1947, when it was conjectured by Polya. I will connect this question to somehow easier problems, like polygonal versions of Hardy-Littlewood and Riesz inequalities and I will discuss the local minimality of regular polygons and the possibility to prove the conjecture by a mixed approach. This talk is based on joint works with Beniamin Bogosel and Ilaria Fragalà. ----------- Luigi Forcella, Assistant Professor (RTD-B, tenure-track) University of Pisa Department of Mathematics Largo Bruno Pontecorvo 5 57127 Pisa, Italy https://pagine.dm.unipi.it/forcella/index.html

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Annuncio conferenza 22 maggio - "An afternoon in Calculus of Variations"
by Luigi Forcella 15 May '25

15 May '25

Care tutte, cari tutti, Con la presente si annuncia la seguente conferenza: giovedì 22 maggio, in Aula Riunioni del Dipartimento di Matematica, si terrà la Conferenza “An afternoon in Calculus of Variations”. L’evento inizierà alle 15:30 e avrà come speakers Serena Dipierro (Perth), Raphäel Prunier (Paris), e Antonio Tribuzio (Bonn). Trovate dettagli a questo link<https://www.dm.unipi.it/en/conference/?id=681cbfab1dc7a56c4185b0f1>. Si allega la locandina. A presto, Luigi Forcella ————— Dear all, We announce the following conference: On Thursday, 22 of May, room Aula Riunioni (Dept. Math), we will have the pleasure to host the event “An afternoon in Calculus of Variations”. The conference will start at 3:30 pm, and as speakers we will have Serena Dipierro (Perth), Raphäel Prunier (Paris), and Antonio Tribuzio (Bonn). Details can be found at this link<https://www.dm.unipi.it/en/conference/?id=681cbfab1dc7a56c4185b0f1>. Attached, the flyer of the event. Best regards, Luigi Forcella

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I: Seminario MAP di questa settimana
by Nicola Picenni 13 May '25

13 May '25

Cari tutti, su richiesta degli organizzatori, inoltro l'annuncio di un seminario di Matilde Gianocca, che si terrà domani mattina alle 11.30 presso il collegio Puteano. Trovate titolo e abstract nel poster allegato o qui: https://cvgmt.sns.it/seminar/937/ Saluti, Nicola

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Annuncio seminario F. Pasqualotto
by Luigi Forcella 01 Apr '25

01 Apr '25

Care tutte, cari tutti, Segnaliamo il seguente seminario nell’ambito dei Seminari di Probabilità che può essere di interesse anche per analisti in generale. Venerdì 4 aprile, ore 14, in Aula Seminari Federico Pasqualotto (Berkeley) terrà un talk<https://www.dm.unipi.it/en/seminar/?id=67e9d94020d73a92fb7e241e> dal titolo “The singularity formation problem in incompressible fluid dynamics”. Trovate l’abstract qui sotto. A presto, Ilaria e Luigi ——— Dear all, We announce the following talk within the activities of the Probability Seminars, which can be of interest for a more general audience. Friday 4 of April, 2:00 PM, in Aula Seminari Federico Pasqualotto (Berkeley) will give a talk<https://www.dm.unipi.it/en/seminar/?id=67e9d94020d73a92fb7e241e> with title “The singularity formation problem in incompressible fluid dynamics”. Please find the abstract below. Best regards, Ilaria and Luigi. ——— Speaker: Federico Pasqualotto (Berkeley) Title: The singularity formation problem in incompressible fluid dynamics Abstract: We will introduce the singularity formation problem in incompressible fluid dynamics, with a focus on the Navier—Stokes equations and the 3d incompressible Euler equations. We will discuss model problems of increasing complexity, and we will comment on recent results, with an emphasis on the use of computer-assisted techniques. We will finally provide an overview of the first swirl-driven singularity formation result for the 3d incompressible Euler equations in the whole space, obtained in collaboration with Tarek Elgindi (Duke University).

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