Geometria_Pisa

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2 participants
767 discussions

I: Position at the Erdõs Center (Budapest)
by Paolo Lisca 21 Dec '21

21 Dec '21

Inoltro annuncio di semestre speciale a Budapest, con varie posizioni associate. Paolo Lisca ________________________________ Da: Stipsicz Andras <stipsicz.andras(a)renyi.hu> Inviato: lunedì 20 dicembre 2021 18:10 Oggetto: Position at the Erdõs Center (Budapest) Dear colleagues, We would like to announce a research semester in "Singularities and low dimensional topology", which will take place in Budapest from February 2023 to June 2023. More details can be found at https://erdoscenter.renyi.hu/articles/singularities-and-low-dimensional-top… Connected to the research semester, we announce: - a number of 6-month or 1-year postdoc positions; - a number of visiting professor positions. The deadline for applying (for both) is 28 February 2022. Here are the links to the job announcements: - postdoc positions: https://erdoscenter.renyi.hu/sites/default/files/jobs/documents/PostdocSLDT… - visiting positions: https://erdoscenter.renyi.hu/sites/default/files/jobs/documents/Visiting23.… Please forward this email to anyone who may be interested in applying. Best wishes, András Stipsicz

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I: Summer school on Alexander polynomials
by Paolo Lisca 17 Dec '21

17 Dec '21

Inoltro annuncio di scuola estiva. Paolo Lisca ________________________________ Da: Marco Golla <marco.golla(a)univ-nantes.fr> Inviato: venerdì 17 dicembre 2021 16:26 Oggetto: Summer school on Alexander polynomials Dear colleagues, We are organising a summer school on Alexander polynomials at the University of Nantes (May 30-June 3, 2022). There will be two mini-courses, one by Fathi Ben-Aribi (Université Catholique de Louvain) on twisted Alexander polynomials in the context of classical knot theory and one by Vincent Florens (Université de Pau) on Alexander polynomials and complex projective curves. We expect to have some contributed talks by young participants. 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://www.math.sciences.univ-nantes.fr/~golla/docs/schools/school-alexand… . The registration page is here: https://www.math.sciences.univ-nantes.fr/AlexanderPolynomials/ and the registration deadline is March 30, 2022. You can contact us at the email address Alexander.Polynomials (at) univ-nantes.fr. Could you pass this information on to any PhD student/postdoc, or even motivated Master student, who might be interested in attending? Funding is available for students who will be selected to give a talk. However, should funding be an insurmountable issue, do ask them to get in touch (Alexander.Polynomials (at) univ-nantes.fr). Thank you! The organisers, Erwan Brugallé, Marco Golla, and François Laudenbach

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I: Postdoc at the University of Vienna in Low dimensional Topology
by Paolo Lisca 16 Dec '21

16 Dec '21

Segnalo una posizione post-doc a Vienna per l'anno prossimo. Paolo Lisca

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Seminario di Combinatoria, Teoria di Lie e Topologia - 9 Dicembre 2021 - Giovanna Carnovale
by Francesco Sala 06 Dec '21

06 Dec '21

Carə tuttə, Vi scrivo per annunciarvi che questo giovedì 9 Dicembre 2021 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 Seminari dalle 15 alle 16. L'oratrice è Giovanna Carnovale (Università di Padova). — Titolo: Approximations of a Nichols algebra from a geometric point of view Abstract: The talk is based on an ongoing joint project with Francesco Esposito and Lleonard Rubio y Degrassi. Nichols (shuffle) algebras are a family of graded Hopf algebras (in a braided monoidal category) which includes symmetric algebras, exterior algebras and the positive part of quantized enveloping algebras. They are crucial in the classification of (pointed) Hopf algebras. However, it is very difficult to describe their relations or to estimate their dimensions in general and new tools are very welcome. We will exploit an equivalence due to Kapranov and Schechtman between a category of graded bialgebras in a braided monoidal category V and the category of factorizable systems of perverse sheaves on all symmetric products Sym^n(C) with values in V. I will describe the factorizable perverse sheaves counterpart of some algebraic constructions, including the n-th approximation of a graded bialgebra. Since the image of Nichols algebras through Kapranov and Schechtman equivalence is very precise, we can translate into geometric statements when a Nichols algebra is finitely presented, or coincides with any of its approximations. — (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 - 2 Dicembre 2021 - Andrea Appel
by Francesco Sala 01 Dec '21

01 Dec '21

Carə tuttə, Vi scrivo per annunciarvi che domani 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, A presto, Francesco

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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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