June 2025 - Geometria_Pisa - Mailing list — Dipartimento di Matematica, UniPI

Seminario di Geometria Martedì 24 Giugno - Alfonso Tortorella
by Carlo Collari 23 Jun '25

23 Jun '25

Buongiorno, Vi ricordo che il prossimo seminario di Geometria e Topologia sarà tenuto da Alfonso Tortorella (Università di Salerno) e si terrà Martedì 24 Giugno alle ore 14:30 presso l'aula Seminari. Per gli interessati ad andare a pranzo con lo speaker, l'appuntamento è in atrio alle 12:45. In allegato titolo e abstract Titolo: Deformations of Symplectic Foliations Abstract: In this talk, based on joint work with Stephane Geudens and Marco Zambon, we develop the deformation theory of symplectic foliations, i.e. regular foliations equipped with a leafwise symplectic form. The main result is that each symplectic foliation is attached with a cubic L-infinity algebra controlling its deformation problem. Indeed, we establish a one-to-one correspondence between the small deformations of a given symplectic foliation and the Maurer–Cartan elements of the associated L-infinity algebra. Further, we prove that, under this one-to-one correspondence, the equivalence by isotopies of symplectic foliations agrees with the gauge equivalence of Maurer–Cartan elements. Finally, we show that the infinitesimal deformations of symplectic foliations can be obstructed. A presto, Carlo e Filippo

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Seminario di Geometria Mercoledì 18 Giugno - Pietro Capovilla
by Filippo Sarti 16 Jun '25

16 Jun '25

Buongiorno, Vi ricordo che il prossimo seminario di Geometria e Topologia sarà tenuto da Pietro Capovilla e si terrà Mercoledì 18 Giugno alle ore 14:30 presso l'aula Seminari. Per gli interessati ad andare a pranzo con lo speaker, l'appuntamento è in atrio alle 12:45. Allego titolo e abstract Titolo: Combination theorems for open covers Abstract: The generalized Lusternik-Schnirelmann category of a space is the minimal cardinality of open covers by subsets whose fundamental group is contained in a given family of groups. The goal of this talk is to present a combination theorem for generalized LS-categories of groups G in terms of the stabilizers of contractible CW-complex equipped with an action by G. This fact has applications to the geometric dimensions of groups and to the simplicial volume of manifolds obtained by gluing. A presto, Carlo e Filippo

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Fwd: [rtop] Geometric Topology Meeting Grenoble August 2025 (Last announcement)
by Bruno Martelli 12 Jun '25

12 Jun '25

---------- Forwarded message --------- Da: wagner(a)imj-prg.fr <wagner(a)imj-prg.fr> Date: gio 12 giu 2025 alle ore 03:25 Subject: [rtop] Geometric Topology Meeting Grenoble August 2025 (Last announcement) To: rtop(a)listes.math.cnrs.fr <rtop(a)listes.math.cnrs.fr> Dear colleagues, We are pleased to invite you to the annual geometric topology meeting of the Réseau Rtop. It will be held at the Institut Fourier, Grenoble, August 25-29. We will have mini-courses by: - David Gay. Title: 5-dimensional parameterized Morse theory and diffeomorphisms of 4-manifolds - Anthony Genevois. Title: Introduction to the coarse topology of lamplighters and one-hour talks by : - Naomi Andrew, - Jules Martel, - Jean Raimbault, - Anne-Laure Thiel, - Vera Vértesi. The website is https://jtg-2025.sciencesconf.org/. You can already register and possibly propose a short talk. The deadline for registration is June 20; confirmation will be given shortly after. Best wishes, François, Emmanuel and Delphine

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Workshop Montreal - Hyperbolic manifolds in dimensions 4 (and more)
by Bruno Martelli 09 Jun '25

09 Jun '25

Buondì, Segnalo il workshop "Hyperbolic manifolds in dimensions 4 (and more)" https://www.crmath.ca/en/activities/#/type/activity/id/4016 Mi dicono gli organizzatori che hanno fondi disponibili per i partecipanti. A presto, Bruno

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Seminario di Geometria Martedì 10 Giugno 2025 - Pietro Capovilla
by Filippo Sarti 09 Jun '25

09 Jun '25

Buongiorno, Vi ricordo che il prossimo seminario di Geometria e Topologia sarà tenuto da Pietro Capovilla e si terrà Martedì 10 Giugno alle ore 14:30 presso l'aula Riunioni. Per gli interessati ad andare a pranzo con lo speaker, l'appuntamento è in atrio alle 12:45. Allego titolo e abstract Titolo: Combination theorems for open covers Abstract: The generalized Lusternik-Schnirelmann category of a space is the minimal cardinality of open covers by subsets whose fundamental group is contained in a given family of groups. The goal of this talk is to present a combination theorem for generalized LS-categories of groups G in terms of the stabilizers of contractible CW-complex equipped with an action by G. This fact has applications to the geometric dimensions of groups and to the simplicial volume of manifolds obtained by gluing. A presto, Carlo e Filippo

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Fwd: [gdrtresses] IHP programme: Illustration as a mathematical research technique
by Bruno Martelli 08 Jun '25

08 Jun '25

---------- Forwarded message --------- Da: s.schleimer(a)warwick.ac.uk <s.schleimer(a)warwick.ac.uk> Date: Sab 7 Giu 2025, 21:42 Subject: [gdrtresses] IHP programme: Illustration as a mathematical research technique To: gdrtresses(a)listes.math.cnrs.fr <gdrtresses(a)listes.math.cnrs.fr> Dear colleagues, From January 5 to April 3, 2026 the Institut Henri Poincareì (Paris, France) will host a research trimester entitled 'Illustration as a mathematical research technique'. This includes an introductory graduate school at CIRM (separate registration required), a mathematical art exhibition (submissions now open), and three workshop weeks focussing on number theory, on geometry/ topology, and on rigorous illustration. There will also be a student apprenticeship program (more info soon). Below is a fuller description of the program. Registration for the program and the conferences is still open: https://indico.math.cnrs.fr/event/13123/ Registration is free but mandatory, and financial support is available. Some funding is earmarked for graduate students and early-career researchers. The deadline to apply for financial support is June 15, 2025. The organizing committee David Bachman (Pitzer College) Reìmi Coulon (CNRS / Universiteì de Bourgogne) Gabriel Dorfsman-Hopkins (St. Lawrence University) Edmund Harriss (University of Arkansas) Martin Skrodzki (TU Delft) Katherine E. Stange (University of Colorado Boulder) Glen Whitney (Studio infinity) ---- Mathematical understanding is built in many ways. Among these, illustration has been a companion and tool to research for as long as research has taken place. We use the term illustration to encompass any of the many ways one might bring a mathematical idea into physical form or experience, including computer visualization, 3D printing, and virtual reality, among others. With modern tools, illustration can even make mathematics an experimental science, so that computational results can drive the cycle of problem, conjecture, and proof. Today, modern technology for the first time places the production of far more complicated 3D models within the reach of many individual mathematicians. Moreover, the very process of illustration itself challenges our understanding of a mathematical topic and forces us to answer questions we may not have posed otherwise. This trimester program will bring together mathematicians using illustration as a research tool with mathematicians newly learning these tools. The group will be comprised of members from various areas of mathematics. The mains goals of the trimester are: - advancing research through the use of mathematical illustration; - disseminating the skills for the creation of mathematical illustration and its use in research; - furthering the theory of illustration as a tool. Program highlights include: - January 5 to 9, 2026: Opening Graduate school at the CIRM (a separate registration is needed at https://conferences.cirm-math.fr/3491.html) - January 19 to 23, 2026: Workshop 'Rigorous Illustrations - Their creation and evaluation for mathematical research' - February 16 to 20, 2026: Conference 'Bridging visualization and understanding in Geometry and Topology' - March 23 to 27, 2026: Conference 'Integrating Research and Illustration in Number Theory' - April 9 to July 25, 2026: Group exhibition 'Mathematics and Art in Creation'. Projects can be submitted here https://sondages.ihp.fr/index.php/559142?lang=en Review of applications will begin July 1st, 2025 and will then continue on a rolling-basis.

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