- Geometria_Pisa - Mailing list — Dipartimento di Matematica, UniPI

Fwd: Summer school "Involutions in algebraic geometry and gauge theory", Nantes Université, 2023 May 30-June 2
by Bruno Martelli 27 Mar '23

27 Mar '23

Inoltro info su summer school Bruno ---------- Forwarded message --------- From: Erwan Brugallé <Erwan.Brugalle(a)math.cnrs.fr> Date: Mon, Mar 27, 2023 at 7:32 AM Subject: Summer school "Involutions in algebraic geometry and gauge theory", Nantes Université, 2023 May 30-June 2 To: Marco GOLLA <Marco.Golla(a)univ-nantes.fr>, Erwan Brugallé < Erwan.Brugalle(a)math.cnrs.fr> ################## # Second announcement ################## Dear colleagues, We are organising a summer school on "Involutions in algebraic geometry and gauge theory" at the University of Nantes (May 30-June 2, 2023). There will be two mini-courses, one by Matilde Manzaroli (Tübingen University) on real algebraic curves and one by Christopher Scaduto (University of Miami) on 4-manifolds and involutions. We expect to have some contributed talks by young participants. Master students are particularly encouraged to apply. The schedule will be pretty light, in order to allow the participants ample time to work on the material covered in the lectures. Some familiarity with knot theory and with (very basic) complex projective geometry will be assumed. You can find more information on the webpage of the school: https://es.sonicurlprotection-fra.com/click?PV=2&MSGID=20230327053200063942… The registration page is here: https://es.sonicurlprotection-fra.com/click?PV=2&MSGID=20230327053200063942… and the registration deadline is March 30, 2022. Could you pass this information on to any PhD student/postdoc/motivated Master student who might be interested in attending? Limited funding is available for Master students and for contributed speakers. However, should funding be an insurmountable issue, do ask them to get in touch (math.summer-school (at) univ-nantes.fr). Thank you! The organisers, Erwan Brugallé and Marco Golla

1 0

Seminari di Geometria
by Bruno Martelli 10 Mar '23

10 Mar '23

Buondì, Inoltro un avviso riguardante i prossimi seminari di geometria, che per qualche motivo tecnico non è comparso nella mailing list. Ne approfitto per ringraziare gli organizzatori. Bruno ---- Carə tuttə, Siamo felici di annunciare che dal 30 marzo ripartiranno i Seminari di geometria. Per questo semestre, i talk si terranno il giovedì mattina alle 11.00 in Aula Seminari. I primi incontri saranno i seguenti: 30 Marzo - *Bram Petri* (Institut de Mathématiques de Jussieu), *Linear programming for hyperbolic surfaces* 06 Aprile - *Antonio Alfieri* (Université du Québec à Montréal), *TBA* 13 Aprile - *Raphael Zentner* (Durham University),* TBA* Maggiori informazioni saranno caricate sulla pagina del dipartimento <https://www.dm.unipi.it/categoria-evento/geometry-seminar/>. Vi aspettiamo! Alice Merz Filippo Bianchi Giuseppe Bargagnati

1 0

Minicorsi Baby Geometri
by Giovanni Italiano 10 Feb '23

10 Feb '23

Buongiorno, vorremmo segnalare due minicorsi organizzati dai Baby Geometri, ovvero Alessandro Sisto (Heriot-Watt University) Mapping Class Groups and relatives: hierarchically hyperbolic spaces. Lukas Lewark (University of Regensburg) An introduction to Khovanov homology and its applications. I minicorsi si svolgeranno nei seguenti orari: Lewark: 27 Febbraio 11-13, 28 Febbraio 11-13, 1 Marzo 11-13, 3 Marzo 9-11, sempre in Aula Riunioni Sisto: 1 Marzo 14-16, 2 Marzo 11-13, 3 Marzo 14-16 sempre in Aula Riunioni Invitiamo eventuali interessati (ad uno dei minicorsi o ad entrambi) a rispondere a questa mail; per motivi organizzativi, chiediamo di farci sapere entro martedì 14 Febbraio. A presto, Alice, Filippo, Giovanni e Giuseppe

1 0

3 giorni di geometria e topologia a Bologna a marzo
by Stefano Riolo 11 Jan '23

11 Jan '23

Dear all, we are pleased to announce the following workshops in Bologna: ----------------------------------------- 1) Manifolds and groups in Bologna (Workshop funded by GNSAGA (INdAM)) Date: Wednesday, Mar 22, 2023 -- Thursday, Mar 23, 2023 Place: Bologna - Dipartimento di Matematica 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 in main lectures and shorter talks in order to give the opportunity to young researchers to present their own research. The workshop is hosted by the University of Bologna and it is sponsored by the GNSAGA (INdAM). After the workshop, the University of Bologna will host the Attività presso l’Unità di Ricerca INdAM “Non-positive curvature in manifolds and groups” (March 24, 2023), sponsored by INdAM. This one-day event will consist in four main lectures given by international speakers. Main speakers: Gianluca Faraco (Università di Milano Bicocca) Francesco Fournier Facio (ETH Zürich) Alessio Savini (Univeristé de Genève) Junior speakers: Federica Bertolotti (SNS Pisa) Viola Giovannini (Université du Luxembourg) Giovanni Italiano (SNS Pisa) Bianca Marchionna (Università di Milano Bicocca) Matteo Migliorini (SNS Pisa) Francesco Milizia (SNS Pisa) Diego Santoro (SNS Pisa) Matteo Tarocchi (Università di Pavia) Enrico Trebeschi (Università di Pavia) Organizers Ludovico Battista, Stefano Francaviglia, Marco Moraschini, Stefano Riolo (Alma Mater Studiorum Università di Bologna) and Filippo Sarti (Università di Torino) website: https://math.unibo.it/en/events/manifolds-and-groups-in-bologna ----------------------------------------- 2) Non-positive curvature in manifolds and groups (Attività presso l'Unità di Ricerca INdAM di Bologna) Date: Friday, Mar 24, 2023 Place: Bologna - Dipartimento di Matematica The aim of this event is to bring together researchers working in geometric topology and geometric group theory, mainly focusing on non-positive curvature phenomena. It is hosted by the University of Bologna and sponsored by INdAM. Before this event, the University of Bologna will host the workshop “Manifolds and groups in Bologna” (March 22-23, 2023, sponsored by GNSAGA — INdAM ), on the same research themes, particularly addressed to the participation and interaction of young researchers. Speakers: Caterina Campagnolo (UAM - Universidad Autónoma de Madrid) Irene Pasquinelli (University of Bristol) Andrea Seppi (Université Grenoble Alpes) Leone Slavich (Università di Pavia) Organizers Pierluigi Contucci (direttore dell'UdR INdAM di Bologna), Ludovico Battista, Stefano Francaviglia, Marco Moraschini, Stefano Riolo (Alma Mater Studiorum Università di Bologna) e Filippo Sarti (Università di Torino) website: https://matematica.unibo.it/it/eventi/udr-indam-bo-2023-03-24 We are looking forward to seeing you in Bologna. Best regards, The organizers

1 0

[Indico] James Lewis, The Complexity of Higher Chow Groups, 30/11/2022, 16:30 Europe/Rome
by francesco.sala＠unipi.it 28 Nov '22

28 Nov '22

Title: The Complexity of Higher Chow Groups, Speaker(s): James Lewis, University of Alberta, Date and time: 30 Nov 2022, 16:30 (Europe/Rome), Lecture series: Algebraic and Arithmetic Geometry Seminar, Venue: Department of Mathematics (Aula Magna). You can access the full event here: https://events.dm.unipi.it/e/127 Abstract -------- Let $X/{\mathbb C}$ be a smooth projective variety. We consider two integral invariants, one of which is the level of the Hodge cohomology algebra $H^*(X,{\mathbb C})$ and the other involving the complexity of the higher Chow groups ${\rm CH}^*(X,m;{\mathbb Q})$ for $m\geq 0$. We conjecture that these two invariants are the same and accordingly provide some strong evidence in support of this. -- Indico :: Email Notifier https://events.dm.unipi.it/e/127

1 0

[Indico] Antonella Grassi, A family of threefolds with remarkable properties (namely: the unreasonable effectiveness of the Schoens), 30/11/2022, 15:00 Europe/Rome
by francesco.sala＠unipi.it 28 Nov '22

28 Nov '22

Title: A family of threefolds with remarkable properties (namely: the unreasonable effectiveness of the Schoens), Speaker(s): Antonella Grassi, Università degli Studi di Bologna, Date and time: 30 Nov 2022, 15:00 (Europe/Rome), Lecture series: Algebraic and Arithmetic Geometry Seminar, Venue: Department of Mathematics (Aula Magna). You can access the full event here: https://events.dm.unipi.it/e/115 Abstract -------- The fiber product of certain rational elliptic surfaces were first studied by Schoen in the 80s to answer questions from string theory. Over the decades the “Schoens” have provided evidence for various conjectures as well as counterexamples to others. I will discuss these conjectures, the unusual features of the Schoens, and present other open questions. -- Indico :: Email Notifier https://events.dm.unipi.it/e/115

1 0

Seminario 27/10/2021
by Tamas Szamuely 25 Nov '22

25 Nov '22

Cari tutti, ecco il programma del prossimo seminario di geometria algebrica e aritmetica di Pisa: Mercoledì 27 ottobre 2021, Dipartimento di matematica, Aula Magna 15:00--16:00 Valerio Melani (Pisa): The Poisson structure on the affine Grassmannian via derived algebraic geometry Motivated by a conjecture of Kapranov-Ginzburg-Vasserot, we will explain how to reinterpret the classical Poisson structure on the affine Grassmannian using tools from derived symplectic (and Poisson) geometry. Our approach is based on the study of symplectic structures on derived stacks whose cotangent complex is not perfect, and therefore uses in a crucial way the formalism of Tate modules. The talk is based on joint work with Mauro Porta and Pavel Safronov. Homepage del seminario: http://pagine.dm.unipi.it/tamas/saga.html Migliori saluti, Tamás Szamuely

2 30

[Indico] Anton Mellit, P=W via $H_2$, 24/11/2022, 16:00 Europe/Rome
by francesco.sala＠unipi.it 23 Nov '22

23 Nov '22

Title: P=W via $H_2$, Speaker(s): Anton Mellit, University of Vienna, Date and time: 24 Nov 2022, 16:00 (Europe/Rome), Lecture series: Seminar on Combinatorics, Lie Theory, and Topology, Venue: Department of Mathematics (Aula Magna). You can access the full event here: https://events.dm.unipi.it/e/108 Abstract -------- By $H_2$ we denote the Lie algebra of polynomial hamiltonian vector fields on the plane. We consider the moduli space of stable twisted Higgs bundles on an algebraic curve of a given coprime rank and degree. De Cataldo, Hausel and Migliorini proved in the case of rank 2 and conjectured in arbitrary rank that two natural filtrations on the cohomology of the moduli space coincide. One is the weight filtration W coming from the Betti realization, and the other one is the perverse filtration P induced by the Hitchin map. Motivated by computations of the Khovanov-Rozansky homology of links by Gorsky, Hogancamp and myself, we look for an action of $H_2$ on the cohomology of the moduli space. We find it in the algebra generated by two kinds of natural operations: on the one hand, we have the operations of cup product by tautological classes, and on the other hand, we have the Hecke operators acting via certain correspondences. We then show that both P and W coincide with the filtration canonically associated to the $\mathfrak{sl}_2$ subalgebra of $H_2$.Based on joint work with Hausel, Minets and Schiffmann. -- Indico :: Email Notifier https://events.dm.unipi.it/e/108

1 0

[Indico] Andrea Ricolfi, Quot schemes and their d-critical structure(s), 23/11/2022, 15:00 Europe/Rome
by francesco.sala＠unipi.it 21 Nov '22

21 Nov '22

Title: Quot schemes and their d-critical structure(s), Speaker(s): Andrea Ricolfi, SISSA, Trieste, Date and time: 23 Nov 2022, 15:00 (Europe/Rome), Lecture series: Algebraic and Arithmetic Geometry Seminar, Venue: Department of Mathematics (Aula Magna). You can access the full event here: https://events.dm.unipi.it/e/116 Abstract -------- D-critical schemes and Artin stacks were introduced by Joyce in 2015, and play a central role in Donaldson-Thomas theory. They typically occur as truncations of (-1)-shifted symplectic derived schemes, but the problem of constructing the d-critical structure on a “DT moduli space” without passing through derived geometry (which is hard) is wide open. We discuss this problem, and new results in this direction, when the moduli space is the Quot scheme of points on a Calabi-Yau 3-fold. Joint work with Michail Savvas. -- Indico :: Email Notifier https://events.dm.unipi.it/e/116

1 0

[Indico] Anton Mellit, P=W via $H_2$, 24/11/2022, 16:00 Europe/Rome
by francesco.sala＠unipi.it 18 Nov '22

18 Nov '22

Title: P=W via $H_2$, Speaker(s): Anton Mellit, University of Vienna, Date and time: 24 Nov 2022, 16:00 (Europe/Rome), Lecture series: Seminar on Combinatorics, Lie Theory, and Topology, Venue: Department of Mathematics (Aula Magna). You can access the full event here: https://events.dm.unipi.it/e/108 Abstract -------- By $H_2$ we denote the Lie algebra of polynomial hamiltonian vector fields on the plane. We consider the moduli space of stable twisted Higgs bundles on an algebraic curve of a given coprime rank and degree. De Cataldo, Hausel and Migliorini proved in the case of rank 2 and conjectured in arbitrary rank that two natural filtrations on the cohomology of the moduli space coincide. One is the weight filtration W coming from the Betti realization, and the other one is the perverse filtration P induced by the Hitchin map. Motivated by computations of the Khovanov-Rozansky homology of links by Gorsky, Hogancamp and myself, we look for an action of $H_2$ on the cohomology of the moduli space. We find it in the algebra generated by two kinds of natural operations: on the one hand, we have the operations of cup product by tautological classes, and on the other hand, we have the Hecke operators acting via certain correspondences. We then show that both P and W coincide with the filtration canonically associated to the $\mathfrak{sl}_2$ subalgebra of $H_2$.Based on joint work with Hausel, Minets and Schiffmann. -- Indico :: Email Notifier https://events.dm.unipi.it/e/108

1 0