- Geometria_Pisa - Mailing list — Dipartimento di Matematica, UniPI

Annuncio CATA IV
by Carlo Collari 09 Feb '26

09 Feb '26

Buongiorno, Allego, per gli interessati, l'annuncio della quarta edizione di CATA, che si svolgerà a Pisa, presso il centro De Giorgi dal 22 al 25 Giugno 2026. A presto, Carlo _____________________________________________ Dear All, This is to announce the workshop *Combinatorial Algebraic Topology, and Applications IV <https://indico.sns.it/event/134/> *(CATA IV), that will be held at Centro De Giorgi in Pisa (IT) from June 22nd to 25th, 2026. The list of speakers includes: Valentina Bais (SISSA) Bruno Benedetti (University of Miami) Jelena Grbic (University of Southampton) Dmitrii Korshunov (Institut de mathématiques de Jussieu - Paris Rive Gauche) Jean-Baptiste Meilhan (Université Grenoble Alpes) Pegah Pournajafi (Collège de France) Francesca Pratali (Universiteit Utrecht) Anne-Laure Thiel (Université Bourgogne Europe) Francesco Vaccarino (Politecnico di Torino) So Yamagata (Fukuoka University) Registration is available at the *REGISTRATION* <https://indico.sns.it/event/134/> page. Registration is free, although mandatory, due to restrictions on the number of participants. *The deadline for registration is the 30th of April 2026*, and it will be confirmed after expiration. Interested participants can apply for a contributed talk. Limited funding might be available to early registered participants, priority will be given to junior participants and contributed speakers. *The deadline to apply for funding is the 31st of March 2026.* For further questions, please write to cata.organisers(a)gmail.com. Looking forward to seeing you in Pisa. The organizers, Luigi Caputi, Carlo Collari and Giuliamaria Menara

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Seminario oggi
by Andrea Tamburelli 29 Jan '26

29 Jan '26

Cari colleghi, vi ricordo il seminario di oggi alle 14:30 in aula Riunioni. Trovate qui sotto titolo e abstract. Per chi fosse interessato, ci troviamo nell'atrio davanti all'aula Riunioni alle 13 per andare a pranzo con lo speaker. Saluti, Andrea _____________________________________ Titolo: Volumes of maximal representations into SO(2,3) Speaker: Timothe Lemistre (Nice) Abstract: Maximal representations of a surface group into a hermitian Lie group G form connected components of the character variety generalising the Teichmüller space. When G=SO(2,3), those representations act cocompactly on some convex domain in the pseudo-hyperbolic space (a pseudo-riemannian analogue of the hyperbolic space), and one can define a volume functional on the space of maximal representations. In this talk I will explain a surprising result concerning the boundedness of this volume functional.

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Workshop "Manifolds and Groups in Bologna, IV", announcement
by Filippo Sarti 23 Jan '26

23 Jan '26

Dear all, we are pleased to announce the workshop Manifolds and Groups in Bologna, IV ----------------------------------------- Date: Wednesday, Apr 8, 2026 -- Friday, Apr 10, 2026 Place: University of Bologna The aim of this workshop is to bring together young researchers working in low-dimensional topology and geometric group theory in a broad sense. The event consists of main lectures and shorter talks in order to give the opportunity to young researchers to present their own research. Main speakers: Ilaria Castellano (Politecnico Torino), Nicola Cavallucci (Fribourg), Christian El Emam (Torino), Sam Fisher (Madrid), Grace Garden (Paris), Alice Kerr (Leipzig), Rym Smai (Nice), Gabriele Viaggi (Pisa) Junior speakers: Shaked Bader (Oxford), Giovanni Framba (Pisa), Ervin Hadžiosmanović (Pisa), Ana Isaković (Cambridge), Laura Lankers (Leipzig), Thimothé Lemistre (Nice-Pavia), Grazia Rago (Bologna) https://eventi.unibo.it/manifolds-and-groups-bologna-2026 Looking forward to seeing you in Bologna, Filippo (on behalf of the organizers)

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Seminario 29/01
by Andrea Tamburelli 20 Jan '26

20 Jan '26

Cari colleghi, vi segnalo il prossimo seminario di geometria, giovedì 29 gennaio alle 14:30 in aula Riunioni. Trovate qui sotto titolo e abstract. Vi esorterei, inoltre, a indicarmi nomi di persone che vorreste invitare in questi prossimi mesi per tenere seminari, in quanto abbiamo parecchi fondi per farlo. Saluti, Andrea _____________________________________ Titolo: Volumes of maximal representations into SO(2,3) Speaker: Timothe Lemistre (Nice) Abstract: Maximal representations of a surface group into a hermitian Lie group G form connected components of the character variety generalising the Teichmüller space. When G=SO(2,3), those representations act cocompactly on some convex domain in the pseudo-hyperbolic space (a pseudo-riemannian analogue of the hyperbolic space), and one can define a volume functional on the space of maximal representations. In this talk I will explain a surprising result concerning the boundedness of this volume functional.

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Newton International Fellowship
by Giovanni Italiano 16 Jan '26

16 Jan '26

Cari tutti, Pubblicizzo l'annuncio una interessante fellowship di 2 anni in UK. Serve un accademico UK come sponsor, nell'istituzione in cui si vuole andare. Nel caso qualcuno fosse interessato a lavorare in teoria geometrica dei gruppi, potrebbe contattare Dawid Kielak a Oxford kielak(a)maths.ox.ac.uk. I tempi sono stretti, la maggior parte dei dipartimenti vorrà una bozza completa per inizio febbraio. La deadline della Royal Society è l'11 Marzo. Serve avere già discusso la tesi di dottorato prima dell'11 marzo. Giovanni ------------------------------------------------------------------------ Dear All, The Royal Society has opened the call for Newton International Fellowship applications for 2026. The scheme provides the opportunity for the best early stage post-doctoral researchers from all over the world to work at UK research institutions for a period of two years. *Please note these changes from the Royal Society to the scheme this year:* *'• In order to be eligible, applicants must have been awarded their PhD or successfully defended their doctoral thesis by the closing date for applications, and have no more than five years’ active full-time postdoctoral experience post-PhD, taking into account career breaks * *• Sponsors are limited to supporting one application per round. This does not mean one application per institution, it means that each UK academic Sponsor can only support one application in any round.'* The overarching aim of the Newton International Fellowship programme is to attract and retain emerging talent in the UK and build a globally connected, mobile research and innovation workforce. The objectives are to: i. Attract talented International early career researchers to establish and conduct their research in the UK; ii. Support early career researchers to pursue high-quality and innovative lines of research; iii. Provide opportunities to acquire new skills and knowledge through training and career development; iv. Foster long-term relationships through networking opportunities and the Newton International Fellowships alumni programme. Eligibility: • Applicants must have been awarded their PhD or successfully defended their doctoral thesis by the closing date for applications. • Applicants should have no more than five years active full-time postdoctoral experience at the time of application, including teaching experience, time spent in industry on research, honorary positions and/or visiting researcher positions. • Applicants should be working outside the UK and should not hold UK citizenship at the time of application. • Applications from individuals who have not studied or worked in the UK previously are encouraged as the scheme aims to establish new links between the Applicant and the UK. • Individuals already living, working, or undertaking research in the UK are not eligible to apply. • Individuals working outside the UK but employed by a UK organisation are also not eligible to apply. • Individuals who have lived, worked or undertaken research in the UK in the 12 months prior to the application deadline are not eligible to apply, with the exception of short-term visits of less than three months in total • Applicants who completed their PhD at a UK organisation must have been working and based outside the UK for at least one year at the deadline for the application. • Applicants proposing to return to their UK-based PhD organisation and/or PhD supervisor or to their postdoctoral supervisor will normally be considered to be ineligible and so Applicants must have exceptional reasons for proposing to do so. Full details of this call and the full eligibility criteria are available here: https://royalsociety.org/grants/newton-international/ and: https://royalsociety.org/-/media/grants/newton-fellowships/newton-internati…

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Fw: Spring school "Khovanov and Floer homotopy" - Nantes - 18th-22nd May 2026
by Paolo Lisca 16 Jan '26

16 Jan '26

Buongiorno, inoltro annnuncio di scuola primaverile. Paolo ________________________________ From: Fabio Gironella <fabio.gironella(a)univ-nantes.fr> Sent: Friday, January 16, 2026 13:24 Cc: orga-school-homotopy(a)univ-nantes.fr <orga-school-homotopy(a)univ-nantes.fr> Subject: Spring school "Khovanov and Floer homotopy" - Nantes - 18th-22nd May 2026 Dear friends and colleagues, We are pleased to announce the spring school "Khovanov and Floer homotopy" at Nantes Université, which will take place from the 18th to the 22nd of May 2026. The school, aimed at Master and PhD students, will focus on recent homotopy methods in low-dimensional and symplectic topology. It will mainly revolve around two mini-courses, of four hours plus an exercise session each. The two courses will be given by Marithania Silvero Casanova<https://marithania.github.io/> (University of Seville), on Khovanov homotopy theory, and by Noah Porcelli<https://sites.google.com/view/noahporcelli/home> (Max Planck Institute, Bonn), on Floer homotopy theory. Beside the two mini-courses, there will be three introductory lessons of one hour each, as well as sessions for short talks. In particular, we welcome proposed short talks from participants who would like to talk about their research during the school. The schedule will be rather light, so enough time will be left for participants to discuss together and discover each other's research interests. Registration is open until February 28th 2026. We will be able to provide accommodation (in twin bedrooms) for a limited number of participants. You can register and apply for funding here<https://springschoolhomotopy-fabiogironella.apps.math.cnrs.fr/registration/…>. More information on the school can be found at this page: https://springschoolhomotopy-fabiogironella.apps.math.cnrs.fr/ Please forward this announcement to colleagues/students who might be interested in attending the spring school. Best regards, Fabio Gironella, Marco Golla, and Stéphane Guillermou (the organisers)

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Concorso RTT
by Bruno Martelli 15 Jan '26

15 Jan '26

Buondì, Inoltro la richiesta di dare massima diffusione a questo concorso RTT MATH-02/B a UniMORE: https://www.unimore.it/it/ateneo/bandi/procedura-di-valutazione-comparativa… A presto, Bruno

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Fw: Seminario di geometria algebrica e aritmetica, 15/01
by Francesco Sala 11 Jan '26

11 Jan '26

FYI ________________________________ Da: Tamas Szamuely <tamas.szamuely(a)unipi.it> Inviato: domenica, gennaio 11, 2026 5:05 PM A: saga(a)lists.dm.unipi.it <saga(a)lists.dm.unipi.it> Oggetto: [Saga] Seminario di geometria algebrica e aritmetica, 15/01 Cari tutti, il primo seminario di 2026 si terr�� gioved�� 15/01 in Aula Magna del dipartimento. Programma: -------------- 15:00--16:00 Francesca Pratali (Utrecht University): Localization of ��-operads Operads are combinatorial gadgets encoding categories of algebras. Introduced by May and Boardman�CVogt in the 1970s to study iterated loop spaces, they have since found applications in algebraic topology, mathematical physics, and algebraic geometry. In modern homotopy theory, categories are studied up to localization at weak equivalences (e.g. spaces up to weak homotopy equivalence, chain complexes up to quasi-isomorphism). Operads are replaced by homotopy-coherent versions: these are Lurie��s ��-operads, and Cisinski-Moerdijk-Weiss dendroidal ��-operads. In homotopical settings, ��-operads often arise via localization, the process of freely inverting a class of morphisms, as in the cases of little disks operads and factorization homology. In the first part of the talk, I will review operads and their algebras, and explain how they provide a unified framework for the homotopy theory of diverse algebraic structures. In a second part, I will focus on operadic localization. The main result I will show is that every ��-operad is weakly equivalent to the localization of a discrete operad, generalizing Joyal��s delocalization theorem for ��-categories. If time permits, I will briefly sketch the combinatorial proof using dendroidal methods and highlight some open questions. Molti saluti, Tam��s Szamuely

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Fwd: [Junk released by Allowed List] PhD position in topology
by Bruno Martelli 24 Dec '25

24 Dec '25

---------- Forwarded message --------- Da: Stipsicz Andras <stipsicz.andras(a)renyi.hu> Date: mar 16 dic 2025 alle ore 15:27 Subject: [Junk released by Allowed List] PhD position in topology To: Stipsicz Andras <stipsicz.andras(a)renyi.hu> Dear colleague, We are writing to advertise 12 PhD scholarships with competitive salaries in low-dimensional topology, contact and symplectic geometry, and singularity theory, with starting date 1st September 2026. The positions are part of the newly-established doctoral network “Top-SCoLDS”. The successful candidates will be enrolled in a PhD program in one of the main nodes of the doctoral network (Budapest, Glasgow, Nantes, Regensburg, and Vienna), and are expected to spend time at other nodes. The idea at the core of the network is to create a cohort of PhD students with shared research interests, who will have plenty of opportunities to travel and meet the other fellow students and supervisors. Applications are now open, until 15th January 2026, at the following webpage: https://topscolds.renyi.hu/ <https://topscolds.renyi.hu/index.html> On the same page you will find all the information for the applicant, including the potential supervisors, their interests, and the mobility requirements. Please forward this email to any interested students. Kind regards, András Stipsicz (on behalf of all PIs)

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Seminario oggi alle 16
by Bruno Martelli 15 Dec '25

15 Dec '25

Buondì, Con colpevolissimo ritardo vi annuncio il seminario di geometria di oggi, che sarà alle 16 in aula N. Siete tutti invitati. A presto Bruno Martelli Aspherical 4-manifolds with positive Euler characteristic – Pietro Capovilla (SNS, Pisa) Monday, Dec 15, 2025 16:00 — 17:00 Aula N (Polo Fibonacci, University of Pisa) Seminars <https://www.dm.unipi.it/en/en/seminars>, Geometry Seminar <https://www.dm.unipi.it/en/en/seminars/?category=653b522f8f0af760bdc42729> I will present an explicit construction of closed oriented aspherical smooth 4-manifolds realizing every non-negative Euler characteristic. This family of manifolds saturates Hopf-Thurston conjecture on the Euler characteristic of aspherical manifolds, as well as Gromov-Lück inequality regarding their geography.

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