June 2023 - Collaboratori - Mailing list — Dipartimento di Matematica, UniPI

[Utenti] [Seminari MAP] Next Seminar
by Luciano Sciaraffia 30 Jun '23

30 Jun '23

>>> English version below! <<< Carə tuttə, Vi annuncio il prossimo seminario MAP: --> Speaker: Konstantinos Bessas (Università di Pavia) --> Data: Martedì 4 luglio, ore 11:00 --> Dove: Aula Riunioni, Dipartimento di Matematica (Pisa) e Online su Gmeet: Konstantinos Bessas (seminarimap.wixsite.com) <https://seminarimap.wixsite.com/seminarimap/articoli/konstantinos-bessas> --> Titolo: Long-range interactions in configurations of liquid droplets at equilibrium --> Abstract: In the first part of the talk we will introduce variational problems involving the free energy associated to the surface tension of liquids. We will show a first classical way of modelling this energy via De Giorgi’s perimeter. Then, we will present a more recent formulation involving the fractional perimeter and we will highlight the main differences between the two settings. In the second part of the talk we will investigate the problem of studying equilibrium shapes for small liquid drops under the action of a confining bulk potential. Some of the results that I will present were obtained in collaboration with Fumihiko Onoue (TUM, München) and Matteo Novaga (UNIPI, Pisa). Ricordiamo che questi seminari sono aperti a tuttə: la prima metà del seminario introduce i concetti e gli strumenti necessari per la seconda metà, dedicata agli argomenti di ricerca. Per altre informazioni, visitate il nostro sito: https://seminarimap.wixsite.com/seminarimap A presto, Gli organizzatori: Daniele Barbera Jeremy Mirmina Mario Rastrelli Leonardo Roveri Luciano Sciaraffia - o - o - o - o - o - o - o - o - o - o - o - o - o - o - o - >>> English Version <<< Dear all, Here the announcement of the next MAP seminar: --> Speaker: Konstantinos Bessas (Università di Pavia) --> Date: Tuesday 7th July, 11:00 --> Where: Aula Riunioni, Dipartimento di Matematica (Pisa) and Online on Gmeet: Konstantinos Bessas (seminarimap.wixsite.com) <https://seminarimap.wixsite.com/seminarimap/articoli/konstantinos-bessas> --> Title: Long-range interactions in configurations of liquid droplets at equilibrium --> Abstract: In the first part of the talk we will introduce variational problems involving the free energy associated to the surface tension of liquids. We will show a first classical way of modelling this energy via De Giorgi’s perimeter. Then, we will present a more recent formulation involving the fractional perimeter and we will highlight the main differences between the two settings. In the second part of the talk we will investigate the problem of studying equilibrium shapes for small liquid drops under the action of a confining bulk potential. Some of the results that I will present were obtained in collaboration with Fumihiko Onoue (TUM, München) and Matteo Novaga (UNIPI, Pisa). We remind that these seminars are addressed to everybody: the first half of the seminar is dedicated to the introduction of notions and tools needed in the second half, which is focused on research topics. For more information, check our website: https://seminarimap.wixsite.com/seminarimap See you soon, The organizers: Daniele Barbera Jeremy Mirmina Mario Rastrelli Leonardo Roveri Luciano Sciaraffia _______________________________________________ Utenti mailing list -- utenti(a)lists.dm.unipi.it To unsubscribe send an email to utenti-leave(a)lists.dm.unipi.it

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[Utenti] interruzione servizio di rete domani e dopodomani
by Emanuele Paolini 28 Jun '23

28 Jun '23

Buongiorno, vi scrivo per comunicarvi che domani e dopodomani verranno fatti degli interventi di sostituzione degli switch di rete al primo piano dell'edificio A, lato fisica (domani) e (dopodomani) al piano terra nell'aula 4 e nell'aula Faedo (scusate l'ignoranza, non so quale sia ma ci viene segnalata così). La sostituzione di uno switch certamente causerà una interruzione di rete (cablata e wireless) per un periodo non breve. Purtroppo non so localizzare l'evento con maggiore precisione spazio/temporale. Credo che gli switch interessati siano terminali e quindi il distacco dovrebbe essere localizzato... però non ne sono certo, ho chiesto maggiori informazioni. L'intervento è il primo che ci riguarda (tutti gli switch andranno sostituiti) ed è stato anticipato rispetto alla programmazione iniziale, per questo non mi è stato possibile dare un preavviso. E. _______________________________________________ Utenti mailing list -- utenti(a)lists.dm.unipi.it To unsubscribe send an email to utenti-leave(a)lists.dm.unipi.it

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[Utenti] [Seminari MAP] Next Seminar
by Jeremy Mirmina 28 Jun '23

28 Jun '23

>>> English version below! <<< Carə tuttə, Vi ricordo il prossimo seminario MAP: --> *Speaker:* Pavlos Zoubouloglou (University of North Carolina) --> *Data:* Giovedì 29 Giugno, ore 14 --> *Dove:* Aula Seminari del Dipartimento di Matematica (Pisa) e Online su Gmeet: Pavlos Zoubouloglou (seminarimap.wixsite.com) <https://seminarimap.wixsite.com/seminarimap/articoli/pavlos-zoubouloglou> --> *Titolo:* *Large Deviations for Empirical Measures of Self-Interacting Markov Chains* --> *Abstract:* *Let [image: \Delta^o] be a finite set and, for each probability measure [image: m] on [image: \Delta^o], let [image: G(m)] be a transition kernel on [image: \Delta^o]. Consider the sequence [image: \{X_n\}] of [image: \Delta^o]-valued random variables such that, given [image: X_0,\ldots,X_n] , the conditional distribution of [image: X_{n+1}] is [image: G(L^{n+1})(X_n,\cdot)] , where [image: L^{n+1}=\frac{1}{n+1}\sum_{i=0}^{n}\delta_{X_i}] . Under conditions on [image: G] we establish a large deviation principle for the sequence [image: \{L^n\}]. As one application of this result we obtain large deviation asymptotics for the Aldous-Flannery-Palacios (1988) approximation scheme for quasi-stationary distributions of finite state Markov chains. The conditions on [image: G] cover other models as well, including certain models with edge or vertex reinforcement.* --> *Arxiv link*: https://arxiv.org/abs/2304.01384 Ricordiamo che questi seminari sono aperti a tuttə: la prima metà del seminario introduce i concetti e gli strumenti necessari per la seconda metà, dedicata agli argomenti di ricerca. Per altre informazioni, visitate il nostro sito: https://seminarimap.wixsite.com/seminarimap A presto, Gli organizzatori: Daniele Barbera Jeremy Mirmina Mario Rastrelli Leonardo Roveri Luciano Sciaraffia - o - o - o - o - o - o - o - o - o - o - o - o - o - o - o - >>> English Version <<< Dear all, I remind you about the upcoming MAP seminar: --> *Speaker: *Pavlos Zoubouloglou (University of North Carolina) --> *Date: *Thursday 29th June, 14:00 --> *Where:* Aula Seminari, Dipartimento di Matematica (Pisa) and Online on Gmeet: Pavlos Zoubouloglou (seminarimap.wixsite.com) <https://seminarimap.wixsite.com/seminarimap/articoli/pavlos-zoubouloglou> --> *Title: **Large Deviations for Empirical Measures of Self-Interacting Markov Chains* --> *Abstract:* *Let [image: \Delta^o] be a finite set and, for each probability measure [image: m] on [image: \Delta^o], let [image: G(m)] be a transition kernel on [image: \Delta^o]. Consider the sequence [image: \{X_n\}] of [image: \Delta^o]-valued random variables such that, given [image: X_0,\ldots,X_n] , the conditional distribution of [image: X_{n+1}] is [image: G(L^{n+1})(X_n,\cdot)] , where [image: L^{n+1}=\frac{1}{n+1}\sum_{i=0}^{n}\delta_{X_i}] . Under conditions on [image: G] we establish a large deviation principle for the sequence [image: \{L^n\}]. As one application of this result we obtain large deviation asymptotics for the Aldous-Flannery-Palacios (1988) approximation scheme for quasi-stationary distributions of finite state Markov chains. The conditions on [image: G] cover other models as well, including certain models with edge or vertex reinforcement.* --> *Arxiv link*: https://arxiv.org/abs/2304.01384 We remind that these seminars are addressed to everybody: the first half of the seminar is dedicated to the introduction of notions and tools needed in the second half, which is focused on research topics. For more information, check our website: https://seminarimap.wixsite.com/seminarimap See you soon, The organizers: Daniele Barbera Jeremy Mirmina Mario Rastrelli Leonardo Roveri Luciano Sciaraffia _______________________________________________ Utenti mailing list -- utenti(a)lists.dm.unipi.it To unsubscribe send an email to utenti-leave(a)lists.dm.unipi.it

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[Utenti] Converging Skills
by Direttore Matematica Pisa 26 Jun '23

26 Jun '23

Buongiorno, segnalo questa importante iniziativa che si sta svolgendo in Sapienza da stamani 26 giugno a giovedì 29 https://convergingskills.unipi.it/ Tanti saluti, Matteo _______________________________________________ Utenti mailing list -- utenti(a)lists.dm.unipi.it To unsubscribe send an email to utenti-leave(a)lists.dm.unipi.it

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[Utenti] [Seminari MAP] Next Seminar
by Jeremy Mirmina 22 Jun '23

22 Jun '23

>>> English version below! <<< Carə tuttə, Vi annuncio il prossimo seminario MAP: --> *Speaker:* Pavlos Zoubouloglou (University of North Carolina) --> *Data:* Giovedì 29 Giugno, ore 14 --> *Dove:* Aula Seminari del Dipartimento di Matematica (Pisa) e Online su Gmeet: Pavlos Zoubouloglou (seminarimap.wixsite.com) <https://seminarimap.wixsite.com/seminarimap/articoli/pavlos-zoubouloglou> --> *Titolo:* *Large Deviations for Empirical Measures of Self-Interacting Markov Chains* --> *Abstract:* *Let [image: \Delta^o] be a finite set and, for each probability measure [image: m] on [image: \Delta^o], let [image: G(m)] be a transition kernel on [image: \Delta^o]. Consider the sequence [image: \{X_n\}] of [image: \Delta^o]-valued random variables such that, given [image: X_0,\ldots,X_n] , the conditional distribution of [image: X_{n+1}] is [image: G(L^{n+1})(X_n,\cdot)] , where [image: L^{n+1}=\frac{1}{n+1}\sum_{i=0}^{n}\delta_{X_i}] . Under conditions on [image: G] we establish a large deviation principle for the sequence [image: \{L^n\}]. As one application of this result we obtain large deviation asymptotics for the Aldous-Flannery-Palacios (1988) approximation scheme for quasi-stationary distributions of finite state Markov chains. The conditions on [image: G] cover other models as well, including certain models with edge or vertex reinforcement.* --> *Arxiv link*: https://arxiv.org/abs/2304.01384 Ricordiamo che questi seminari sono aperti a tuttə: la prima metà del seminario introduce i concetti e gli strumenti necessari per la seconda metà, dedicata agli argomenti di ricerca. Per altre informazioni, visitate il nostro sito: https://seminarimap.wixsite.com/seminarimap A presto, Gli organizzatori: Daniele Barbera Jeremy Mirmina Mario Rastrelli Leonardo Roveri Luciano Sciaraffia - o - o - o - o - o - o - o - o - o - o - o - o - o - o - o - >>> English Version <<< Dear all, Here the announcement of the next MAP seminar: --> *Speaker: *Pavlos Zoubouloglou (University of North Carolina) --> *Date: *Thursday 29th June, 14:00 --> *Where:* Aula Seminari, Dipartimento di Matematica (Pisa) and Online on Gmeet: Pavlos Zoubouloglou (seminarimap.wixsite.com) <https://seminarimap.wixsite.com/seminarimap/articoli/pavlos-zoubouloglou> --> *Title: **Large Deviations for Empirical Measures of Self-Interacting Markov Chains* --> *Abstract:* *Let [image: \Delta^o] be a finite set and, for each probability measure [image: m] on [image: \Delta^o], let [image: G(m)] be a transition kernel on [image: \Delta^o]. Consider the sequence [image: \{X_n\}] of [image: \Delta^o]-valued random variables such that, given [image: X_0,\ldots,X_n] , the conditional distribution of [image: X_{n+1}] is [image: G(L^{n+1})(X_n,\cdot)] , where [image: L^{n+1}=\frac{1}{n+1}\sum_{i=0}^{n}\delta_{X_i}] . Under conditions on [image: G] we establish a large deviation principle for the sequence [image: \{L^n\}]. As one application of this result we obtain large deviation asymptotics for the Aldous-Flannery-Palacios (1988) approximation scheme for quasi-stationary distributions of finite state Markov chains. The conditions on [image: G] cover other models as well, including certain models with edge or vertex reinforcement.* --> *Arxiv link*: https://arxiv.org/abs/2304.01384 We remind that these seminars are addressed to everybody: the first half of the seminar is dedicated to the introduction of notions and tools needed in the second half, which is focused on research topics. For more information, check our website: https://seminarimap.wixsite.com/seminarimap See you soon, The organizers: Daniele Barbera Jeremy Mirmina Mario Rastrelli Leonardo Roveri Luciano Sciaraffia _______________________________________________ Utenti mailing list -- utenti(a)lists.dm.unipi.it To unsubscribe send an email to utenti-leave(a)lists.dm.unipi.it

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[Utenti] palle rotte
by Pietro Majer 20 Jun '23

20 Jun '23

Cari colleghi, si pensava, col Direttore, in un’ottica di piccoli restauri, di dare una sistematina agli appendiabiti rotti. Si tratta di sostituire le palle nere di plastica spezzate con palle di legno di faggio. (Ne abbiamo già riparati quattro. In foto quello del mio studio) [cid:36e76ac1-ecf6-4ecf-903d-e4516bc1bd5a] Le palle da 5cm di diametro su Amazon costano circa 1euro l’una. Purtroppo non è possibile rimborsare queste spese e ognuno si autofinanzia. Sto per fare un’altro ordine: chi è interessato può rispondermi singolarmente. Saluti, P. PS: scusate il subject clickbait, naturalmente non è necessario elaborare oltre su questo tema :-) _______________________________________________ Utenti mailing list -- utenti(a)lists.dm.unipi.it To unsubscribe send an email to utenti-leave(a)lists.dm.unipi.it

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[Utenti] Seminario Lorenzo Furio
by Davide Lombardo 19 Jun '23

19 Jun '23

Cari tutti, faccio pubblicità ad un seminario "interno" di un dottorando del nostro dipartimento, Lorenzo Furio, che si svolgerà martedì 27 giugno alle ore 11 in aula seminari. Trovate qui sotto il titolo e l'abstract. (Nonostante il titolo in inglese, se non ci saranno richieste in senso contrario il seminario si svolgerà in italiano.) Saluti a tutti, Davide -------------------------- Galois representations attached to elliptic curves and Serre's uniformity question The study of Galois representations attached to elliptic curves is a very fruitful branch of number theory, leading to the solution of very difficult problems, such as Fermat's Last Theorem. Given a rational elliptic curve E, the representation \rho_{E,p} is described by the action of the absolute Galois group of \mathbb{Q} on the p-torsion points of E. In 1972 Serre proved that for every rational elliptic curve E without complex multiplication there exists an integer N_E such that, for every prime p>N_E, the Galois representation \rho_{E,p} is surjective onto GL_2(\mathbb{F}_p). In the same article, he asked whether the constant N_E can be taken to be independent of the curve, and this became known as Serre's Uniformity Question. In this talk, I will discuss the current progress towards an answer to this question, in particular the Runge method for modular curves developed by Bilu and Parent and the recent improvements obtained via this method by Le Fourn and Lemos, as well as explain how to solve some of the questions left open by the latter result. This is joint work with Davide Lombardo. _______________________________________________ Utenti mailing list -- utenti(a)lists.dm.unipi.it To unsubscribe send an email to utenti-leave(a)lists.dm.unipi.it

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[Utenti] [Seminari MAP] Next Seminar
by Jeremy Mirmina 16 Jun '23

16 Jun '23

>>> English version below! <<< Carə tuttə, Vi annuncio il prossimo seminario MAP: --> *Speaker:* Gianmarco Brocchi (Chalmers University / Gothenburg University) --> *Data:* Lunedì 19 Giugno, ore 14 --> *Dove:* Aula Seminari del Dipartimento di Matematica (Pisa) e Online su Gmeet: Gianmarco Brocchi (seminarimap.wixsite.com) <https://seminarimap.wixsite.com/seminarimap/articoli/gianmarco-brocchi> --> *Titolo:* *The Kato square root problem on pasta* --> *Abstract:* *Consider a matrix A with complex, bounded, coefficients, which satisfies an ellipticity condition. In 1953 Tosio Kato asked what is the domain of the square root operator of -div(A∇). Does it coincide with the one of ∇ and do they have comparable L^2 norms? For example, this is the case when A is the identity. The problem made history as the Kato square root problem, and was solved in 2002 by Auscher, Hofmann, Lacey, McIntosh and Tchamitchian. In the first part of this talk, I introduce the Kato square root problem and its applications (to boundary value problems, perturbation estimates, boundedness of Cauchy integral on Lipschitz curves). In the second part, I will survey the recent developments aiming to push the techniques used to solve the Kato problem on the whole space to more general manifolds. A particularly challenging question is if we can allow degenerate ellipticity, meaning that the matrix A perturbing the operator can fail to be elliptic at some point. This question is phrased in terms of weighted estimates for the operator -div(A∇), for which one wants to prove quadratic estimates.* Ricordiamo che questi seminari sono aperti a tuttə: la prima metà del seminario introduce i concetti e gli strumenti necessari per la seconda metà, dedicata agli argomenti di ricerca. Per altre informazioni, visitate il nostro sito: https://seminarimap.wixsite.com/seminarimap A presto, Gli organizzatori: Daniele Barbera Jeremy Mirmina Mario Rastrelli Leonardo Roveri Luciano Sciaraffia - o - o - o - o - o - o - o - o - o - o - o - o - o - o - o - >>> English Version <<< Dear all, Here the announcement of the next MAP seminar: --> *Speaker: *Gianmarco Brocchi (Chalmers University / Gothenburg University) --> *Date: *Monday 19th June, 14:00 --> *Where:* Aula Seminari, Dipartimento di Matematica (Pisa) and Online on Gmeet: Gianmarco Brocchi (seminarimap.wixsite.com) <https://seminarimap.wixsite.com/seminarimap/articoli/gianmarco-brocchi> --> *Title: **The Kato square root problem on pasta* --> *Abstract: **Consider a matrix A with complex, bounded, coefficients, which satisfies an ellipticity condition. In 1953 Tosio Kato asked what is the domain of the square root operator of -div(A∇). Does it coincide with the one of ∇ and do they have comparable L^2 norms? For example, this is the case when A is the identity. The problem made history as the Kato square root problem, and was solved in 2002 by Auscher, Hofmann, Lacey, McIntosh and Tchamitchian. In the first part of this talk, I introduce the Kato square root problem and its applications (to boundary value problems, perturbation estimates, boundedness of Cauchy integral on Lipschitz curves). In the second part, I will survey the recent developments aiming to push the techniques used to solve the Kato problem on the whole space to more general manifolds. A particularly challenging question is if we can allow degenerate ellipticity, meaning that the matrix A perturbing the operator can fail to be elliptic at some point. This question is phrased in terms of weighted estimates for the operator -div(A∇), for which one wants to prove quadratic estimates.* We remind that these seminars are addressed to everybody: the first half of the seminar is dedicated to the introduction of notions and tools needed in the second half, which is focused on research topics. For more information, check our website: https://seminarimap.wixsite.com/seminarimap See you soon, The organizers: Daniele Barbera Jeremy Mirmina Mario Rastrelli Leonardo Roveri Luciano Sciaraffia _______________________________________________ Utenti mailing list -- utenti(a)lists.dm.unipi.it To unsubscribe send an email to utenti-leave(a)lists.dm.unipi.it

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[Utenti] Fwd: Richiesta diffusione info su bando per l'assegnazione di borse per periodi di studio e ricerca in Nord America – ISSNAF
by Paola Boito 16 Jun '23

16 Jun '23

Buongiorno, segnalo a studenti e dottorandi interessati queste borse di studio ISSNAF per il Nord America. Cordialmente, Paola Boito -------- Forwarded Message -------- Subject: Richiesta diffusione info su bando per l'assegnazione di borse per periodi di studio e ricerca in Nord America – ISSNAF Date: Tue, 13 Jun 2023 13:59:35 +0200 From: Cooperations <cooperations(a)unipi.it> CC: Paola Cappellini <paola.cappellini(a)unipi.it>, Cristina Orsini <cristina.orsini(a)unipi.it> Gentilissime e gentilissimi, questa email per informarvi che è stato pubblicato un concorso per l’attribuzione di 9 borse per periodi di studio e ricerca in Nord America rivolte a studenti iscritti a un Corso di Laurea Magistrale, Magistrale a Ciclo Unico o Dottorato di Ricerca dell’Università di Pisa. Tali borse si inseriscono nell’ambito dell’accordo tra l’Università di Pisa e la Fondazione ISSNAF. Tutte le info qui: https://www.unipi.it/index.php/studiare-all-estero/item/24049-bando-per-l-a… Si prega di darne diffusione tra i vostri studenti e dottorandi. Grazie in anticipo e cordiali saluti, Unità Cooperazione Internazionale Piazza Evangelista Torricelli 4, 56126, Pisa cooperations(a)unipi.it _______________________________________________ Utenti mailing list -- utenti(a)lists.dm.unipi.it To unsubscribe send an email to utenti-leave(a)lists.dm.unipi.it

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[Utenti] Uscita bando di dottorato B
by Roberto Frigerio 05 Jun '23

05 Jun '23

Buongiorno, alla pagina https://dottorato.unipi.it/index.php/it/concorsi-d-ammissione-a-a-2023-2024… è uscito il bando di dottorato relativo a 3 borse PNRR che saranno attivate presso il nostro corso di dottorato. Tali borse riguardano le seguenti tematiche: “Modelli ridotti non-lineari per il monitoraggio strutturale del patrimonio culturale e la simulazione numerica di eventi estremi” “Enrico Betti e la scuola matematica pisana: per uno studio del patrimonio archivistico” “Limiti di scala di dinamiche stocastiche” Vi chiedo la cortesia di pubblicizzare il bando in tutti i modi che riteniate opportuni. Cordiali saluti, Roberto Frigerio _______________________________________________ Utenti mailing list -- utenti(a)lists.dm.unipi.it To unsubscribe send an email to utenti-leave(a)lists.dm.unipi.it

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Collaboratori June 2023