March 2026 - NumPI - Mailing list — Dipartimento di Matematica, UniPI

[Indico] [Event reminder] A TAME method for the Inverse Laplace Transform of tame functions (31/03/2026, 11:00 Europe/Rome)
by Fabio Durastante 30 Mar '26

30 Mar '26

Title: A TAME method for the Inverse Laplace Transform of tame functions, Speaker(s): Nikita Deniskin, Scuola Normale Superiore, Date and time: 31 Mar 2026, 11:00 (Europe/Rome), Lecture series: Seminar on Numerical Analysis, Venue: Dipartimento di Matematica (Aula Magna). You can access the full event here: https://events.dm.unipi.it/e/339 Abstract -------- The Laplace transform and its inverse are widely used tools in both theoretical and applied contexts. However, while the direct Laplace transform is stable, the inverse Laplace transform is an inherently ill-posed problem, which makes its accurate computation challenging; this has led to extensive research in numerical methods for the inverse Laplace transform. In this talk, we focus on a family of algorithms, called Abate-Whitt methods, which recover the original function via linear combinations of evaluations of the transform. We relate the accuracy, with theoretical bounds, of the Abate-Whitt method to an approximation problem: constructing a rational approximation of the exponential $e^z$ on certain domains of the complex plane. We propose a new method, dubbed TAME, based on the AAA algorithm for rational approximation. TAME is especially effective for problems in queueing theory, in particular in analyzing phase-type distributions (Markov chains), and in computing the first return times in fluid queues. Here evaluations of the Laplace transform are (relatively) expensive, so it is highly important to minimize the number of needed evaluations. Joint work with Federico Poloni, arXiv:2510.14799. Note ---- Reminder of tomorrow’s seminar -- Indico :: Email Notifier https://events.dm.unipi.it/e/339

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[Indico] Nikita Deniskin, A TAME method for the Inverse Laplace Transform of tame functions - 31 Mar 2026
by Fabio Durastante 18 Mar '26

18 Mar '26

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Fw: Talk by Francesco Rinaldi - March 27th
by Fabio Durastante 04 Mar '26

04 Mar '26

Dear Everybody, Please find attached the announcement for an upcoming FLOPtalks from our friends in Florence. The seminar may be of interest to many of you. Best, Fabio ________________________________ Da: FLOPtalks <floptalks-group(a)unifi.it> Inviato: martedì, marzo 3, 2026 4:45:36 PM A: FLOPtalks <floptalks-group(a)unifi.it> Oggetto: Talk by Francesco Rinaldi - March 27th Dear colleagues and friends, we are pleased to announce next seminar of the FLorence OPtimization talkS (FLOPS) series. Francesco Rinaldi<https://www.math.unipd.it/dipartimento/persone/francesco.rinaldi/>, Full Professor at Università di Padova, will give a talk entitled "Projection-Free Optimization in Action: Scalable Methods for Network Science and Graph Learning". The talk will be on March 27th at 11:00 a.m. in Room 107 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, Marianna & Margherita -- 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/7e4a6617-a53a-…<https://groups.google.com/a/unifi.it/d/msgid/floptalks-group/7e4a6617-a53a-…>.

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