March 2022 - 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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Fwd: [gdrtresses] Conference: "Complex Hyperbolic geometry and related topics"
by Bruno Martelli 29 Mar '22

29 Mar '22

---------- Forwarded message --------- From: wagner(a)imj-prg.fr <wagner(a)imj-prg.fr> Date: Mon, Mar 28, 2022 at 8:29 AM Subject: [gdrtresses] Conference: "Complex Hyperbolic geometry and related topics" To: gdrtresses(a)listes.math.cnrs.fr <gdrtresses(a)listes.math.cnrs.fr> We are organising a conference "Complex Hyperbolic geometry and related topics" at the CIRM, in Luminy, from 4 to 8th of July 2022, in honor of ELisha Falbel. You are warmly welcome to participate and promote this event. The preregistration is open at https://conferences.cirm-math.fr/2622.html The deadline for registration is 6 of June. Limited financial support is available mostly intended for PhD students and young researchers.

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[Indico] Lecture: Local positivity and effective Diophantine approximation (23/03/2022, 14:30 Europe/Rome)
by francesco.sala＠unipi.it 22 Mar '22

22 Mar '22

Title: Local positivity and effective Diophantine approximation, Speaker(s): Matthias Nickel, Pisa, Date and time: 23 Mar 2022, 14:30 (Europe/Rome), Lecture series: Algebraic and Arithmetic Geometry Seminar, Venue: Dipartimento di Matematica (Aula Magna). You can access the full event here: https://events.dm.unipi.it/e/74 Abstract -------- In this talk I will discuss a new approach to prove effective results in Diophantine approximation relying on lower bounds of Seshadri constants. I will then show how to use it to prove an effective theorem on the simultaneous approximation of two algebraic numbers satisfying an algebraic equation -- Indico :: Email Notifier https://events.dm.unipi.it/e/74

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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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