November 2021 - Geometria_Pisa - Mailing list — Dipartimento di Matematica, UniPI

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

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Annuncio: Summer School and Workshop on "Representation theory and flag or quiver varieties" - June 13 - 22, 2022 - Paris
by Francesco Sala 29 Nov '21

29 Nov '21

Carə tuttə, Vi scrivo per annunciarvi: --- A summer school will take place in the university Paris Diderot, from June 13th to 17th 2022, on "Representation theory and flag or quiver varieties". It will focus on the following topics: -Quantum cohomology and K-theory, -Stable envelopes, -Quiver varieties, -Cluster algebras -… The school will consists of 4 courses given by L. Mihalcea, R. Rymanyi, A. Smirnov, C. Robles, T. Lam and A. Shapiro. After the school there will be a 3-days workshop, from June 20th to 22nd, with research talks on the same subjects. Some funding is available for the housing of participants. For more information see https://school2022.sciencesconf.org/ Registration is open and will be closed on March 15th, 2022. Organizers : N. Perrin (Université Paris-Saclay) O. Schiffmann (Université Paris-Saclay) E. Vasserot (Université de Paris) M. Varagnolo (Université Cergy-Paris) --- Vi prego di inoltrare questo annuncio a tuttə coloro che possano essere interessati. A presto, Francesco

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Seminario di Combinatoria, Teoria di Lie e Topologia - 2 Dicembre 2021 - Andrea Appel
by Francesco Sala 29 Nov '21

29 Nov '21

Carə tuttə, Vi scrivo per annunciarvi che questo giovedì vi sarà un seminario in presenza per il ciclo di seminari "Seminario di Combinatoria, Teoria di Lie e Topologia” di Pisa. Il seminario si svolgerà in Aula Magna dalle 15 alle 16. L'oratore è Andrea Appel (Università di Parma). — Titolo: Generalized Schur-Weyl duality for quantum affine symmetric pairs and orientifold KLR algebras Abstract: In the work of Kang, Kashiwara, and Kim, the Schur–Weyl duality between quantum affine algebras and affine Hecke algebras is extended to certain Khovanov-Lauda-Rouquier (KLR) algebras, whose defining com- binatorial datum is given by the poles of the normalized R–matrix on a set of representations. In this talk, I will describe a boundary version of this construction, providing a Schur–Weyl duality between quantum symmetric pairs of affine type and KLR algebras arising from a framed quiver with an involution. With respect to the Kang-Kashiwara-Kim construction, the extra combinatorial datum we take into account is given by the poles of the k–matrix (that is, a solution of the reflection equation) of the quantum symmetric pair. This is based on joint work in progress with T. Przezdziecki. — (Qualora pensiate di venire, per aiutarmi nella stesura del documento di tracciamento, vi prego di iscrivervi qui) Vi prego di inoltrare questo messaggio a tutti coloro che ritenete possano essere interessati. Sperando di vedervi numerosi, vi mando i miei saluti, Francesco

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Reading course su omologia di Heegaard Floer
by Filippo Bianchi 26 Nov '21

26 Nov '21

Cari tutti, care tutte, Con altri dottorandi di Pisa stiamo organizzando un reading course sull'omologia di Heegaard Floer o una delle sue varianti, ad esempio la "grid homology" per nodi e link. Chiunque fosse interessato a partecipare può rispondere a questa mail nei prossimi giorni, in modo che possiamo incontrarci la prossima settimana per definire con più precisione l'argomento da trattare, le fonti da seguire ed il periodo in cui cominciare le letture. Saluti, a presto Filippo Bianchi

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Fwd: [Personale.docente.dm] Assegni di ricerca - pubblicazione bando
by Bruno Martelli 25 Nov '21

25 Nov '21

Segnalo due assegni biennali presso il nostro dipartimento, aperti a tutti i settori della matematica. Bruno Martelli ---------- Forwarded message --------- From: Matteo Novaga <matteo.novaga(a)unipi.it> Date: Thu, Nov 25, 2021 at 7:59 AM Subject: [Personale.docente.dm] Assegni di ricerca - pubblicazione bando To: personale.docente(a)dm.unipi.it <personale.docente(a)dm.unipi.it> Cc: Cristina Lossi <cristina.lossi(a)unipi.it>, Simona Guidotti < simona.guidotti(a)unipi.it> Buongiorno, segnalo, chiedendo di darne ampia diffusione, il bando per due assegni di ricerca in Matematica, consultabile alla pagina https://bandi.unipi.it/public/Bandi/Detail/1cd16e96-3687-4359-a51b-99a90106… Il termine per la presentazione delle domande è il 24 dicembre alle ore 13. Saluti, Matteo

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Seminario di Combinatoria, Teoria di Lie e Topologia - OGGI - Kyoji Saito
by Francesco Sala 25 Nov '21

25 Nov '21

Carə tuttə, Vi scrivo per ricordarvi che OGGI vi sarà un seminario in presenza per il ciclo di seminari "Seminario di Combinatoria, Teoria di Lie e Topologia” di Pisa. Il seminario si svolgerà in Aula Magna dalle 15 alle 17 (il formato sarà 45min + 45min, con una breve pausa in mezzo). L'oratore è Kyoji Saito (Kavli IPMU, Tokyo). — Titolo: Elliptic Artin Monoids and Higher Homotopy Groups Abstract: A half century ago when simply elliptic singularity was introduced, it was a natural question whether its discriminant complement is a K(π, 1) space. At that time, Fulvio Lazzeri suggested a possibility of existence of a non-trivial π2 class by a heuristic argument on the real discriminant complement. In the present talk, I approach this problem from elliptic Artin monoids, where the monoid is defined by generalizing the classical Artin braid relations to the new relations, called elliptic braid relations, defined on elliptic diagrams. Contraly to the classical Artin monoids, the elliptic Artin monoids are not cancellative and their natural homomorphisms to elliptic Artin groups (=the fundamental groups of the elliptic discriminant complements) are not injective (except for rank 1 case). This fact leads to me to a construction of π2-classes in the complement of the discriminant. We conjecture that they are non-vanishing. Then, we reformulate the classical K(π, 1)-conjecture for complements of discriminants, whether the discriminant complements are homotopic to classifying spaces associated to the elliptic Artin monoids. — (Qualora pensiate di venire, per aiutarmi nella stesura del documento di tracciamento, vi prego di iscrivervi qui) Vi prego di inoltrare questo messaggio a tutti coloro che ritenete possano essere interessati. Sperando di vedervi numerosi, vi mando i miei saluti, Francesco

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Seminario di Combinatoria, Teoria di Lie e Topologia - 25 Novembre 2021 - Kyoji Saito
by Francesco Sala 22 Nov '21

22 Nov '21

Carə tuttə, Vi scrivo per annunciarvi che questo giovedì vi sarà un seminario in presenza per il ciclo di seminari "Seminario di Combinatoria, Teoria di Lie e Topologia” di Pisa. Il seminario si svolgerà in Aula Magna dalle 15 alle 17 (con una breve pausa in mezzo). L'oratore è Kyoji Saito (Kavli IPMU, Tokyo). — Titolo: Elliptic Artin Monoids and Higher Homotopy Groups Abstract: A half century ago when simply elliptic singularity was introduced, it was a natural question whether its discriminant complement is a K(π, 1) space. At that time, Fulvio Lazzeri suggested a possibility of existence of a non-trivial π2 class by a heuristic argument on the real discriminant complement. In the present talk, I approach this problem from elliptic Artin monoids, where the monoid is defined by generalizing the classical Artin braid relations to the new relations, called elliptic braid relations, defined on elliptic diagrams. Contraly to the classical Artin monoids, the elliptic Artin monoids are not cancellative and their natural homomorphisms to elliptic Artin groups (=the fundamental groups of the elliptic discriminant complements) are not injective (except for rank 1 case). This fact leads to me to a construction of π2-classes in the complement of the discriminant. We conjecture that they are non-vanishing. Then, we reformulate the classical K(π, 1)-conjecture for complements of discriminants, whether the discriminant complements are homotopic to classifying spaces associated to the elliptic Artin monoids. — (Qualora pensiate di venire, per aiutarmi nella stesura del documento di tracciamento, vi prego di iscrivervi qui) Vi prego di inoltrare questo messaggio a tutti coloro che ritenete possano essere interessati. Sperando di vedervi numerosi, vi mando i miei saluti, Francesco

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Fwd: [gdrtresses] 4-manifolds: from above and below
by Bruno Martelli 13 Nov '21

13 Nov '21

Conference on 4-manifolds at Luminy. Bruno ---------- Forwarded message --------- From: wagner(a)imj-prg.fr <wagner(a)imj-prg.fr> Date: Fri, Nov 12, 2021 at 5:41 PM Subject: [gdrtresses] 4-manifolds: from above and below To: gdrtresses(a)listes.math.cnrs.fr <gdrtresses(a)listes.math.cnrs.fr> Dear all, Together with Ana Lecuona and Stefan Friedl, we are organising a conference entitled "4-manifolds: from above and below" that will take place during the week of 12-16 September 2022 at the CIRM in Luminy, not far from Marseille: https://conferences.cirm-math.fr/2593.html We would be grateful if you could share this announcement with your students, postdocs, and topology-inclined colleagues! We hope to see you there, or at some point in the near future! Ana, Anthony and Stefan

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Master a Marsiglia
by Bruno Martelli 11 Nov '21

11 Nov '21

Segnalo un programma di Master in geometria e topologia a Marsiglia, per l'anno prossimo (allegato). Può essere inoltrato a eventuali studenti interessati. Bruno

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Fwd: Postdoc at Sydney
by Bruno Martelli 05 Nov '21

05 Nov '21

Post-doc in geometric topology a Sidney ---------- Forwarded message --------- From: Stephan Tillmann <stephan.tillmann(a)sydney.edu.au> Date: Fri, Nov 5, 2021 at 3:45 AM Subject: Postdoc at Sydney To: tillus <stephan.tillmann(a)sydney.edu.au> Dear colleague, I'm advertising a 2-year research-only position in Geometry & Topology at the Sydney Mathematical Research Institute at the University of Sydney. Could you please pass this message on to any students or others who might be interested? The closing date for applications is 30 November 2021. Details can be found here: https://www.mathjobs.org/jobs/list/18709 Best regards, Stephan =============================================== Stephan 'Tillus' Tillmann Professor of Geometric Topology School of Mathematics and Statistics F07 The University of Sydney NSW 2006 Australia Deputy Director Australian Mathematical Sciences Institute The University of Melbourne, Australia e-mail: stephan.tillmann(a)sydney.edu.au web: http://www.maths.usyd.edu.au/u/tillmann phone: +61-2-9351-2005 ===============================================

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