Geometria_Pisa

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Seminario mercoledì ore 16
by Bruno Martelli 21 Mar '22

21 Mar '22

Buondì, Con colpevole ritardo, segnalo un seminario di geometria per mercoledì prossimo (dopodomani). A presto, Bruno SEMINARI DI GEOMETRIA 23-Mar-2022 - 16:00 Aula Magna - Dipartimento di Matematica Titolo: An arithmetic, hyperbolic, rational homology 3-sphere that bounds geometrically Leonardo Ferrari, Neuchatel (Svizzera) Abstract: In this seminar, we'll introduce Davis and Januszkiewicz combinatorial techniques for building manifolds from right-angled polytope, as well as some topological properties inherited by these manifolds. We'll then present some obstructions to producing rational homology 3-spheres (QHS3) in this setting, and explain how to use these obstructions to improve tree-search algorithms for hyperbolic QHS3. We'll finally explain how to promote geodesical embeddings to geometrical bounds, and combine these tools to construct the first example of a hyperbolic, arithmetic, QHS3 that bounds geometrically.

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Fwd: [SPAM]Conference announcement
by Bruno Martelli 16 Mar '22

16 Mar '22

---------- Forwarded message --------- From: Costantino <francesco.costantino(a)math.univ-toulouse.fr> Date: Tue, Mar 15, 2022 at 10:23 PM Subject: [SPAM]Conference announcement To: Bruno Martelli <bruno.martelli(a)unipi.it>, Roberto Frigerio < roberto.frigerio(a)unipi.it>, Stefano Francaviglia < stefano.francaviglia(a)unibo.it>, Carlo Petronio <carlo.petronio(a)unipi.it>, Gabriele Mondello <mondello(a)mat.uniroma1.it>, Francesco Bonsante < bonfra07(a)unipv.it> Dear all We are organising a conference in honor of Vladimir Turaev: Quantum Topology and Geometry in Paris, Institut Henri Poincaré from 13t to 17th of June 2022. You are warmly welcome to participate and promote this event. The registration is open at https://www.mathconf.org/qtg2022. The deadline for registration is 30th of April (31th of march for demands of financial suport for students and post-docs). The poster is attached to this email. For information concerning the covid travel regulation in France please visit: https://www.interieur.gouv.fr/covid-19-international-travel Our best wishes Alexis Virelizier, Christian Blanchet, Emmanuel Wagner, François Costantino and Nathan Geer

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[Indico] [Event reminder] Two results about Grothendieck's Section Conjecture (16/03/2022, 14:30 Europe/Rome)
by francesco.sala＠unipi.it 15 Mar '22

15 Mar '22

Please note that the event "Two results about Grothendieck's Section Conjecture" will start on 16 Mar 2022, 14:30 (Europe/Rome). It will take place at Dipartimento di Matematica (Aula Magna). You can access the full event here: https://indico.cs.dm.unipi.it/e/73 Description ----------- Grothendieck's Section Conjecture states that, if $X$ is an hyperbolic curve over a field $k$ finitely generated over $\mathbb{Q}$, every section of the map $\pi_1(X) \to \mathsf{Gal}(k)$ is associated with a rational point of the completion of $X$. After summarizing the main known facts concerning the conjecture, we will present two new results. First, we generalize to number fields a theorem which was proved over $\mathbb{Q}$ by Stix: we prove that if $k$ is a number field and the Weil restriction of $X$ to $\mathbb{Q}$ admits a rational map to a non-trivial Brauer-Severi variety, then $X$ satisfies the conjecture. Secondly, if $k$ is finitely generated over $\mathbb{Q}$, we prove that the conjecture holds for sections which satisfy a strong birationality assumption. In particular, this implies that the section conjecture is equivalent to Esnault and Hai's cuspidalization conjecture, which states that every Galois section of every hyperbolic curve $X$ lifts to every open subset of $X$. -- Indico :: Email Notifier https://indico.cs.dm.unipi.it/e/73

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Seminario di Combinatoria, Teoria di Lie e Topologia - 3 Marzo 2022 - Nicoletta Cantarini
by Francesco Sala 02 Mar '22

02 Mar '22

Carə tuttə, Vi scrivo per annunciarvi che domani vi sarà un seminario per il ciclo di seminari "Seminario di Combinatoria, Teoria di Lie e Topologia” di Pisa. Il seminario si svolgerà in Aula Riunioni dalle 15 alle 16. L'oratrice è Nicoletta Cantarini (Università di Bologna). — Titolo: Verma modules for the Lie superalgebra E(5,10) Abstract: in this talk we will describe the construction of the so-called finite Verma modules for Z-graded Lie superalgebras and study the finite Verma modules over the exceptional linearly compact Lie superalgebra E(5,10). This is done through the classification of singular vectors. We will show that the corresponding morphisms of Verma modules can be arranged in an infinite number of bilateral infinite complexes which can be viewed as "exceptional" de Rham complexes for E(5,10). — Vi prego di inoltrare questo messaggio a tuttə coloro che ritenete possano essere interessatə. Sperando di vedervi numerosə, vi mando i miei saluti, A presto, Francesco

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Fwd: Postdoctoral position available at the University of L'Aquila: Deadline: 30th March 2022
by Bruno Martelli 01 Mar '22

01 Mar '22

---------- Forwarded message --------- From: Barbara Nelli <barbara.nelli(a)univaq.it> Date: Tue, Mar 1, 2022 at 6:17 AM Subject: Postdoctoral position available at the University of L'Aquila: Deadline: 30th March 2022 To: Barbara Nelli <barbara.nelli(a)univaq.it> Cc: Giuseppe Pipoli <giuseppe.pipoli(a)univaq.it> Dear All, I would like to draw your attention to the *postdoctoral position* available to work at the University of L'Aquila. I would greatly appreciate it if you could circulate the details of this position to your networks and encourage suitable candidates to apply. The announcement is in italian and it is attached to this e-mail. If you need some help, please do no hesitate to contact Barbara Nelli (barbara.nelli(a)univaq.it) and Giuseppe Pipoli ( giuseppe.pipoli(a)univaq.it). Here are some details: *Title*: Differential and algebraic geometric structures. *Topics: *The research will focus on differential and algebraic geometry. Themes of particular interest are: classification of Riemannian manifolds and submanifolds whose curvature satisfies some geometric equation or property, evolution by geometric flows of Riemannian manifolds and submanifolds, classification of geometric structures on manifolds, birational geometry of algebraic manifolds. *Number of positions:* 1 *Duration*: 12 months, with possibility of renewal *Salary*: around 1400 € net per month *Deadline*: 30th March 2022 *Requirements:* PhD in Mathematics *Application: *online only on the web site https://pica.cineca.it/univaq/ (you may search using the code: disim2022-ar10). If you need help filling out the online form, please feel free to contact Barbara Nelli (barbara.nelli(a)univaq.it) and Giuseppe Pipoli ( giuseppe.pipoli(a)univaq.it) *Admission exam: *CV and interview* (on-line)* Sincelery Yours, Barbara Nelli

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Seminario di Combinatoria, Teoria di Lie e Topologia - 2 Marzo 2022 - Nicoletta Cantarini
by Francesco Sala 28 Feb '22

28 Feb '22

Carə tuttə, Vi scrivo per annunciarvi che il 2 Marzo venturo vi sarà un seminario per il ciclo di seminari "Seminario di Combinatoria, Teoria di Lie e Topologia” di Pisa. Il seminario si svolgerà in Aula Riunioni dalle 15 alle 16. L'oratrice è Nicoletta Cantarini (Università di Bologna). — Titolo: Verma modules for the Lie superalgebra E(5,10) Abstract: in this talk we will describe the construction of the so-called finite Verma modules for Z-graded Lie superalgebras and study the finite Verma modules over the exceptional linearly compact Lie superalgebra E(5,10). This is done through the classification of singular vectors. We will show that the corresponding morphisms of Verma modules can be arranged in an infinite number of bilateral infinite complexes which can be viewed as "exceptional" de Rham complexes for E(5,10). — 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 scuola estiva
by Paolo Lisca 25 Feb '22

25 Feb '22

Inoltro annuncio di scuola estiva a Bologna. PL https://matematica.unibo.it/it/didattica/summer-e-winter-school [https://matematica.unibo.it/@@site-logo/logo-unibo.png]<https://matematica.unibo.it/it/didattica/summer-e-winter-school> Summer e winter school — Matematica<https://matematica.unibo.it/it/didattica/summer-e-winter-school> matematica.unibo.it

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seminario
by Paolo Lisca 23 Feb '22

23 Feb '22

Buongiorno, inoltro avviso di seminario. Paolo Lisca --------------- Data e ora: giovedì 18 gennaio ore 15 Speaker: Carlo Collari (Università di Pisa) Titolo: Omologia Multipath e poset dei multi-cammini. Title: Multipath homology and the path poset. Abstract: The aim of this talk is to present some homology theories for graphs (and, in particular, multipath homology), describe their mutual relationship, and see how these theories are connected with other homology theories (i.e. homology theories for knots and algebras). We start by describing some classical theories for graphs. Then, we will focus on the construction, due to Helme-Guizon and Rong, of chromatic homology. This theory categorifies the chromatic polynomial of graphs, and its construction is based on Khovanov homology. In particular, we will present a result due to J. Przytycki, which relates Khovanov homology, chromatic homology, and Hochschild homology. Afterwards, we will describe Turner and Wagner's approach to the "extension" of chromatic homology to oriented graphs while preserving an analogue of Przytycki's result. Finally, we will define multipath homology and compare it with Turner-Wagner homology. In the last part of the talk, time permitting, we will give a topological description of the path poset, which is a key ingredient in the definition of Turner-Wagner and multipath homologies. This talk is based on joint work with L. Caputi (University of Aberdeen) and S. Di Trani (Sapienza Università di Roma). -------------------- Il seminario avrà luogo nella sala virtuale: https://teams.microsoft.com/l/meetup-join/19%3ameeting_MTgxNjUyYTEtNTljOC00… [https://statics.teams.cdn.office.net/hashedassets-launcher/favicon/favicon-…]<https://teams.microsoft.com/l/meetup-join/19%3ameeting_MTgxNjUyYTEtNTljOC00…> Join conversation<https://teams.microsoft.com/l/meetup-join/19%3ameeting_MTgxNjUyYTEtNTljOC00…> teams.microsoft.com

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Overleaf
by Francesco Sala 09 Feb '22

09 Feb '22

Car* tutt*, Prima di spammare tutti gli afferenti al dipartimento, scrivo a voi. Avrei intenzione di comprare una licenza “collaborator” di Overleaf della durata di un anno utilizzando i miei fondi di ateneo. Per motivi burocratici, per fare ciò ho bisogno di trovare almeno altre 4 persone interessate. Il costo della licenza per persona è di Euro 116.8 + IVA 22%- l’acquisto di gruppo ha uno sconto rispetto all’acquisto della licenza per un singolo (https://www.overleaf.com/user/subscription/plans). Fatemi sapere se siete interessati. Ciao, Francesco

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I: postdoc opening in geometry
by Paolo Lisca 08 Feb '22

08 Feb '22

Inoltro annuncio di assegno di ricerca alla SISSA. Paolo Lisca ________________________________ Da: Gleb Smirnov <gleb.smirnov(a)unige.ch> Inviato: martedì 8 febbraio 2022 16:52 Oggetto: postdoc opening in geometry Dear Colleagues: FYI, SISSA (International School for Advanced Studies), located in Trieste, is advertising a post-doctoral position in geometry and topology; this is a two-year position that can be extended for one more year. Candidates with expertise in the areas of low-dimensional topology, 4-manifolds, knotted surfaces, generalized complex geometry, symplectic geometry, and metrics with lower curvature bounds are particularly encouraged to apply. You find the official announcement at the following link: https://www.sissa.it/system/files/bandi/Announcement_ar_fs-mate-3-2022.pdf https://www.sissa.it/bandi/selezione-pubblica-titoli-colloquio-conferimento… Selezione pubblica per titoli e colloquio per il conferimento di n. 1 assegno di ricerca - Area Matematica (ref. prof. Torres) | Scuola Internazionale Superiore di Studi Avanzati<https://www.sissa.it/bandi/selezione-pubblica-titoli-colloquio-conferimento…> www.sissa.it La domanda di partecipazione alla selezione , nonché i titoli posseduti, i documenti e le pubblicazioni ritenute utili per la selezione, devono essere presentati, a pena di esclusione, per via telematica, utilizzando l’applicazione informatica dedicata alla pagina / Under penality of exclusion applications for participation in the competition, along with the relevant You can apply at the following link: https://pica.cineca.it/sissa/ar-fs-mate-3-2022/ The deadline to submit applications is 9/3/2022 at 1 pm CET. For technical queries concerning the application process, please contact: assegniricerca(AT)sissa.it<http://sissa.it/> Kind regards, Gleb

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