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seminario Beneventano domani
by Beatrice Meini 12 Jan '26

12 Jan '26

Buonasera, scusate lo scarso preavviso. Domani alle 14, in Saletta Riunioni al Dip Matematica, Pierfrancesco Beneventano, un nostro ex studente e ora post-doc a MIT, terra' il seminario: Edge of Stochastic Stability: SGD does not train neural networks as you expect it https://www.dm.unipi.it/en/seminar/?id=694aba9c2ac7f6b23978e5a0 Saluti, Beatrice

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Fw: Talk by Davide Palitta - January 19th
by Fabio Durastante 05 Jan '26

05 Jan '26

Dear all, I am forwarding the announcement below from the FLorence OPtimization talkS (FLOPS) mailing list, as the topic may be of interest to many of you. Please find the details of the seminar hereunder. Best, Fabio ________________________________ Da: FLOPtalks <floptalks-group(a)unifi.it> Inviato: lunedì, gennaio 5, 2026 4:02:44 PM A: FLOPtalks <floptalks-group(a)unifi.it> Cc: davide.palitta(a)unibo.it <davide.palitta(a)unibo.it> Oggetto: Talk by Davide Palitta - January 19th Dear colleagues and friends, we are pleased to announce the next seminar of the FLorence OPtimization talkS (FLOPS) series. Davide Palitta<https://www.unibo.it/sitoweb/davide.palitta>, RTDb at Università di Bologna, will give a talk entitled "The S^T-S-SVD and Applications". The talk will be on January 19th at 11:00 a.m. in Room 119 Centro didattico Morgagni<https://g.co/kgs/uuxpeDA>. The abstract of the talk is available at the following link<https://sites.google.com/unifi.it/floptalks/home?authuser=3> (as well as in the attached poster). Best regards, Margherita & Marianna -- You received this message because you are subscribed to the Google Groups "FLOPtalks" group. To unsubscribe from this group and stop receiving emails from it, send an email to floptalks-group+unsubscribe(a)unifi.it<mailto:floptalks-group+unsubscribe@unifi.it>. To view this discussion, visit https://groups.google.com/a/unifi.it/d/msgid/floptalks-group/9e7571c1-e9ab-…<https://groups.google.com/a/unifi.it/d/msgid/floptalks-group/9e7571c1-e9ab-…>.

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Fwd: Talk by Simone Rebegoldi - December 11th (FLOPS)
by Fabio Durastante 04 Dec '25

04 Dec '25

Dear all, I am forwarding the announcement below from the FLorence OPtimization talkS (FLOPS) mailing list, as the topic may be of interest to many of you. Please find the details of the seminar hereunder. Best, Fabio -------- Messaggio Inoltrato -------- Oggetto: Talk by Simone Rebegoldi - December 11th Data: Thu, 4 Dec 2025 07:33:55 -0800 (PST) Mittente: FLOPtalks <floptalks-group(a)unifi.it> A: FLOPtalks <floptalks-group(a)unifi.it> CC: srebegoldi(a)unimore.it Dear colleagues and friends, we are pleased to announce the next seminar of the FLorence OPtimization talkS (FLOPS) series. Simone Rebegoldi <https://unimore.unifind.cineca.it/resource/person/113208>, RTDb at Università degli studi di Modena e Reggio Emilia,will give a talk entitled "On the convergence and stability of multiscale decompositions for imaging inverse problems". The talk will be on *December** 11th at 11:15 a.m. *in**Room 007 Centro didattico Morgagni <https://g.co/kgs/uuxpeDA>. The abstract of the talk is available at the following link <https://sites.google.com/unifi.it/floptalks/home?authuser=3> (as well as in the attached poster). Best regards, Margherita & Marianna -- You received this message because you are subscribed to the Google Groups "FLOPtalks" group. To unsubscribe from this group and stop receiving emails from it, send an email to floptalks-group+unsubscribe(a)unifi.it. To view this discussion, visit https://groups.google.com/a/unifi.it/d/msgid/floptalks-group/d52c826d-332d-… <https://groups.google.com/a/unifi.it/d/msgid/floptalks-group/d52c826d-332d-…>.

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HPSC Colloquia - Darya Majidi - L’Intelligenza Artificiale per costruire un futuro digitale, etico, ed inclusivo
by Fabio Durastante 13 Nov '25

13 Nov '25

Inizia il ciclo di incontri “HPSC Colloquia”, organizzato dal dottorato in "High Performance Scientific Computing”, in collaborazione con il ciclo di incontri "Matematici al Lavoro", in cui I nostri studenti hanno l'opportunità di confrontarsi con professionisti e scoprire le diverse carriere verso cui i percorsi formativi del nostro ateneo possono portare. Scrivo per ricordarvi del prossimo appuntamento, che sarà Mercoledì 19 Novembre alle ore 11:00 nell'Aula Magna del Dipartimento di Matematica, e online al link: https://meetings.dm.unipi.it/b/luc-bw9-xim-ayo Ospite dell'incontro sarà Darya Majidi, President UN Women Italy - Fortune Italia Most Powerful Women 2023 - CEO Daxo Group - Founder Donne 4.0 - Italian/Iranian Entrepreneur with 30 years in digital transformation & AI - Board Member - Speaker - Author. Darya terrà una conferenza dal titolo: "L’Intelligenza Artificiale per costruire un futuro digitale, etico, ed inclusivo" (di cui l'abstract è riportato sotto) L'incontro si concluderà con un dibattito e una sessione di domande e risposte, un momento prezioso per interagire direttamente con l'ospite. Tutti gli interessati sono caldamente invitati a partecipare. Non esitate a rispondere a questa email per ulteriori informazioni. Cordiali Saluti per HPSC: Luca Heltai, Giuseppe Felici per Matematici al lavoro: Stefano Galatolo, Silvia Gazzola, Marco Romito Titolo: "L’Intelligenza Artificiale per costruire un futuro digitale, etico, ed inclusivo” ABSTRACT L’intelligenza artificiale rappresenta una delle più potenti trasformazioni della nostra epoca, capace di ridefinire non solo i modelli economici e scientifici, ma anche i valori fondamentali che orientano le società umane. L’intervento propone una riflessione sulla costruzione di un’intelligenza artificiale al servizio dell’uomo, etica, trasparente e inclusiva. Verranno affrontati i temi di machine learning, reti neurali, etica, bias nei dati e e dell’importanza di un approccio multidisciplinare che integri competenze tecniche, etiche e sociali. L’obiettivo è stimolare nei ricercatori una consapevolezza critica e un impegno attivo nella progettazione di tecnologie che promuovano equità, sostenibilità e rispetto dei diritti umani.

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[Indico] Kai Bergermann, Numerical linear algebra meets multiplex networks, 13/11/2025, 11:00 Europe/Rome
by fabio.durastante＠unipi.it 12 Nov '25

12 Nov '25

Title: Numerical linear algebra meets multiplex networks, Speaker(s): Kai Bergermann, Scuola Normale Superiore, Date and time: 13 Nov 2025, 11:00 (Europe/Rome), Lecture series: Seminar on Numerical Analysis, Venue: Department of Mathematics (Sala Riunioni). You can access the full event here: https://events.dm.unipi.it/e/329 Abstract -------- Multiplex networks are used to model complex systems from myriad applications. They generalize classical complex networks by recording different types of relationships, different interactions, or changing interactions over time between the same entities in different layers. They possess natural linear algebraic representations in terms of structured matrices, which makes efficient numerical linear algebra techniques a valuable tool for their analysis. In this talk, I will present contributions to multiplex network analysis relying on matrix function approximation and nonlinear spectral methods. I will discuss centrality measures, the solution of stiff systems of non-linear differential equations with exponential Runge--Kutta integrators, un- and semi-supervised community detection, and core-periphery detection. All presented methods have a linear runtime scaling, which allows the treatment of large-scale multiplex networks and numerical experiments for all considered problems will be presented. -- Indico :: Email Notifier https://events.dm.unipi.it/e/329

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[Indico] Prof. Luca Heltai, An overview of non-matching coupling algorithm for High Performance Finite Element Applications, 11/11/2025, 14:00 Europe/Rome
by fabio.durastante＠unipi.it 10 Nov '25

10 Nov '25

Title: An overview of non-matching coupling algorithm for High Performance Finite Element Applications, Speaker(s): Prof. Luca Heltai, Università di Pisa, Date and time: 11 Nov 2025, 14:00 (Europe/Rome), Lecture series: Seminar on Numerical Analysis, Venue: Dipartimento di Matematica (Aula Seminari). Address: Largo Bruno Pontecorvo, 5, 56127 Pisa PI You can access the full event here: https://events.dm.unipi.it/e/333 Abstract -------- This seminar presents an overview of non-matching coupling algorithms for high-performance finite element applications, with emphasis on implementation and preconditioning aspects. We address ficitious domain, immersed boundary, and mixed-dimensional problems on non-matching grids, as arise in coupled PDE systems defined on heterogeneous domains. We derive different formulations and show how most of them can be traced back to variations or stabilizations of the Lagrange multiplier and distributed Lagrange multiplier frameworks. We discuss various implementation aspects of the problem, including exact and inexact integration across non-matching grids, matrix based and matrix-free transfer operators, particle-based transfer operators, and discuss briefly some augmented Lagrangian-based preconditioners, designed to yield optimal and scalable convergence properties when used in conjunction with iterative Krylov solvers. Finally, we discuss what is the current status of the implementation for these solvers within the deal.II finite element library. StreamingThe seminar will also be broadcast online at the link: https://meetings.dm.unipi.it/b/luc-kwc-keb-p9k Note ---- Reminder -- Indico :: Email Notifier https://events.dm.unipi.it/e/333

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[Indico] Prof. Luca Heltai, An overview of non-matching coupling algorithm for High Performance Finite Element Applications, 11/11/25, 2:00 PM Europe/Rome
by fabio.durastante＠unipi.it 06 Nov '25

06 Nov '25

Title: An overview of non-matching coupling algorithm for High Performance Finite Element Applications, Speaker(s): Prof. Luca Heltai, Università di Pisa, Date and time: Nov 11, 2025, 2:00 PM (Europe/Rome), Lecture series: Seminar on Numerical Analysis, Venue: Dipartimento di Matematica (Aula Seminari). Address: Largo Bruno Pontecorvo, 5, 56127 Pisa PI You can access the full event here: https://events.dm.unipi.it/e/333 Abstract -------- This seminar presents an overview of non-matching coupling algorithms for high-performance finite element applications, with emphasis on implementation and preconditioning aspects. We address ficitious domain, immersed boundary, and mixed-dimensional problems on non-matching grids, as arise in coupled PDE systems defined on heterogeneous domains. We derive different formulations and show how most of them can be traced back to variations or stabilizations of the Lagrange multiplier and distributed Lagrange multiplier frameworks. We discuss various implementation aspects of the problem, including exact and inexact integration across non-matching grids, matrix based and matrix-free transfer operators, particle-based transfer operators, and discuss briefly some augmented Lagrangian-based preconditioners, designed to yield optimal and scalable convergence properties when used in conjunction with iterative Krylov solvers. Finally, we discuss what is the current status of the implementation for these solvers within the deal.II finite element library. StreamingThe seminar will also be broadcast online at the link: https://meetings.dm.unipi.it/b/luc-kwc-keb-p9k -- Indico :: Email Notifier https://events.dm.unipi.it/e/333

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[Indico] Kai Bergermann, Numerical linear algebra meets multiplex networks, 13/11/2025, 11:00 Europe/Rome
by fabio.durastante＠unipi.it 03 Nov '25

03 Nov '25

Title: Numerical linear algebra meets multiplex networks, Speaker(s): Kai Bergermann, Scuola Normale Superiore, Date and time: 13 Nov 2025, 11:00 (Europe/Rome), Lecture series: Seminar on Numerical Analysis, Venue: Department of Mathematics (Sala Riunioni). You can access the full event here: https://events.dm.unipi.it/e/329 Abstract -------- Multiplex networks are used to model complex systems from myriad applications. They generalize classical complex networks by recording different types of relationships, different interactions, or changing interactions over time between the same entities in different layers. They possess natural linear algebraic representations in terms of structured matrices, which makes efficient numerical linear algebra techniques a valuable tool for their analysis. In this talk, I will present contributions to multiplex network analysis relying on matrix function approximation and nonlinear spectral methods. I will discuss centrality measures, the solution of stiff systems of non-linear differential equations with exponential Runge--Kutta integrators, un- and semi-supervised community detection, and core-periphery detection. All presented methods have a linear runtime scaling, which allows the treatment of large-scale multiplex networks and numerical experiments for all considered problems will be presented. -- Indico :: Email Notifier https://events.dm.unipi.it/e/329

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Colloquium Daniela Calvetti
by Silvia Gazzola 20 Oct '25

20 Oct '25

Cari tutte e tutti, Vi scrivo per segnalarvi che, la prossima settimana, Daniela Calvetti<https://mathstats.case.edu/faculty/daniela-calvetti/> sarà in visita presso il nostro dipartimento. In particolare, lunedì 27 ottobre, alle ore 16, presso l'Aula Magna del Dipartimento di Matematica, terrà un colloquium dal titolo: `Linear algebra joins probability in the search for sparse and group sparse solutions with few data’. Trovate ulteriori dettagli al link: https://www.dm.unipi.it/en/seminar/?id=68f20c6cdefecee83efcca3e Fatemi pur anche sapere se desiderate interagire con Daniela Calvetti intanto che si trova a Pisa. Cordiali saluti, Silvia ============= Dr Silvia Gazzola Dipartimento di Matematica Università di Pisa https://sites.google.com/view/silviaspersonalwebpage/silvias-homepage ---------------------------------------------------------------------------------------------------------------------------------------------------------- You may receive this email outside my normal working hours — no response is expected outside your working hours ----------------------------------------------------------------------------------------------------------------------------------------------------------

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Seminario Fabio Credali - 25 Settembre 2025 - ore 12.00
by Luca Heltai 17 Sep '25

17 Sep '25

Car* tutt*, vi scrivo per segnalare un seminario che si terrà il 25 Settembre alle ore 12.00 in Sala riunioni presso il dipartimento di Matematica: Speaker: Dr. Fabio Credali, King Abdullah University of Science and Technology - KAUST Title: Advances on the finite element discretization of fluid-structure interaction problems Abstract: We review the main features of an unfitted finite element method for fluid-structure interaction problems based on a distributed Lagrange multiplier in the spirit of the fictitious domain approach. A coupling term describes the interaction between fluid and solid and it involves functions defined over two distinct non-matching grids, thus its evaluation is not trivial. We study the effect of exact and inexact integration by presenting quadrature estimates supported by numerical results. Moreover, we show that our method is stable even in presence of small cut cells and we provide an upper bound for the condition number. Finally, we outline the mass conservation properties of the proposed approach in the case of popular conforming finite element spaces. This work is a collaborative effort with Daniele Boffi, Lucia Gastaldi and Najwa Alshehri.

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