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
Cari tutti, il seminario di Valerio Melani previsto per domani è ANNULLATO e posticipato a una data ulteriore che annuncierò prossimamente. Buona giornata, Tamás Szamuely ________________________________________ Da: Geometria_Pisa <geometria_pisa-bounces@fields.dm.unipi.it> per conto di Tamas Szamuely <tamas.szamuely@unipi.it> Inviato: giovedì 21 ottobre 2021 14:44:17 A: geometria_pisa@fields.dm.unipi.it; dottorandi@dm.unipi.it; rubei@math.unifi.it; Gabriele Vezzosi; fabio.tonini@unifi.it; Umberto Zannier; luca.migliorini.math@gmail.com; Francesco Sala; michele.pernice@sns.it; guglielmo.nocera@sns.it; Andrea GALLESE; Davide GORI; andrea.ferraguti@sns.it; Gregory James Pearlstein; Luca Morstabilini; Davide Lombardo; Giovanni Gaiffi; Andrea Maffei; Francesco Sala Oggetto: [Geometria_pisa] Seminario 27/10/2021 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 _______________________________________________ Geometria_Pisa mailing list Geometria_Pisa@fields.dm.unipi.it https://fields.dm.unipi.it/listinfo/geometria_pisa
Cari tutti, il seminario posticipato di Valerio Melani si terrà mercoledì 10 novembre alle 15:00 in Aula Magna. Ricordo il programma: ------------------ 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. ----------------- Chiederei agli interessati di compilare il seguente semplice modulo Moodle (misure Covid): https://doodle.com/poll/dx8d73hzyai4va9q?utm_source=poll&utm_medium=link Homepage del seminario: http://pagine.dm.unipi.it/tamas/saga.html Migliori saluti, Tamás Szamuely
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 17 novembre alle 15:00 in Aula Magna. Programma: ------------------ 15:00--16:00 Camilla Felisetti (Trento): Topology of Lagrangian fibrations and P=W phenomena on irreducible symplectic varieties Irreducible holomorphic symplectic (IHS) varieties can be thought as a generalization of hyperkähler manifolds allowing singularities. Among them we can find for example moduli spaces of sheaves on K3 and abelian surfaces, which have been recently shown to play a crucial role in nonabelian Hodge theory. After recalling the main features of IHS varieties, I will present several results concerning their intersection cohomology and the perverse filtration associated with a Lagrangian fibration, establishing a compact analogue of the celebrated P=W conjecture by de Cataldo, Hausel and Migliorini for varieties which admit a symplectic resolution. The talk is based on joint works with Mirko Mauri, Junliang Shen and Qizheng Yin. ----------------- Chiederei agli interessati di compilare il seguente semplice modulo Doodle (misure Covid): https://doodle.com/poll/fgwgprbw2v8nrwea?utm_source=poll&utm_medium=link Homepage del seminario: http://pagine.dm.unipi.it/tamas/saga.html Migliori saluti, Tamás Szamuely
Car* tutt*, Chi vuole partecipare al “solito” pranzo prima del seminario, potrebbe contattarmi in privato entro domani sera? Grazie. A presto, Francesco Il 15 nov 2021, 09:00 +0100, Tamas Szamuely <tamas.szamuely@unipi.it>, ha scritto:
Cari tutti,
il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 17 novembre alle 15:00 in Aula Magna.
Programma: ------------------
15:00--16:00 Camilla Felisetti (Trento): Topology of Lagrangian fibrations and P=W phenomena on irreducible symplectic varieties
Irreducible holomorphic symplectic (IHS) varieties can be thought as a generalization of hyperkähler manifolds allowing singularities. Among them we can find for example moduli spaces of sheaves on K3 and abelian surfaces, which have been recently shown to play a crucial role in nonabelian Hodge theory. After recalling the main features of IHS varieties, I will present several results concerning their intersection cohomology and the perverse filtration associated with a Lagrangian fibration, establishing a compact analogue of the celebrated P=W conjecture by de Cataldo, Hausel and Migliorini for varieties which admit a symplectic resolution. The talk is based on joint works with Mirko Mauri, Junliang Shen and Qizheng Yin.
-----------------
Chiederei agli interessati di compilare il seguente semplice modulo Doodle (misure Covid): https://doodle.com/poll/fgwgprbw2v8nrwea?utm_source=poll&utm_medium=link
Homepage del seminario: http://pagine.dm.unipi.it/tamas/saga.html
Migliori saluti, Tamás Szamuely _______________________________________________ Geometria_Pisa mailing list Geometria_Pisa@fields.dm.unipi.it https://fields.dm.unipi.it/listinfo/geometria_pisa
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 24 novembre alle 15:00 in Aula Magna. Programma: ------------------ 15:00--16:00 Andrea Ferraguti (Pisa): Abelian dynamical Galois groups Dynamical Galois groups are invariants associated to dynamical systems generated by the iteration of a self-rational map of P^1. These are still very mysterious objects, and it is conjectured that abelian groups only appear in very special cases. We will show how the problem is deeply related to a dynamical property of these rational maps (namely that of being post-critically finite) and we will explain how to approach and prove certain non-trivial cases of the conjecture. This is based on joint works with A. Ostafe, C. Pagano and U. Zannier. ----------------- Chiederei agli interessati di compilare il seguente semplice modulo Doodle (misure Covid): https://doodle.com/poll/8wvpz7e53m3tghva?utm_source=poll&utm_medium=link Homepage del seminario: http://pagine.dm.unipi.it/tamas/saga.html Migliori saluti, Tamás Szamuely
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 24 novembre alle 15:00 in AULA SEMINARI (primo piano) del Dipartimento di Matematica, e non in Aula Magna. Il programma è lo stesso: ------------------ 15:00--16:00 Andrea Ferraguti (Pisa): Abelian dynamical Galois groups Dynamical Galois groups are invariants associated to dynamical systems generated by the iteration of a self-rational map of P^1. These are still very mysterious objects, and it is conjectured that abelian groups only appear in very special cases. We will show how the problem is deeply related to a dynamical property of these rational maps (namely that of being post-critically finite) and we will explain how to approach and prove certain non-trivial cases of the conjecture. This is based on joint works with A. Ostafe, C. Pagano and U. Zannier. ----------------- Chiederei agli interessati di compilare il seguente semplice modulo Doodle (misure Covid): https://doodle.com/poll/8wvpz7e53m3tghva?utm_source=poll&utm_medium=link Homepage del seminario: http://pagine.dm.unipi.it/tamas/saga.html Migliori saluti, Tamás Szamuely _______________________________________________
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 15 dicembre alle 15:00 in Aula Magna. Programma: ------------------ 15:00--16:00 Thomas Geisser (Tokyo): Duality for motivic cohomology over local fields We give an outline of a (conjectural) construction of a cohomology theory for smooth and proper varieties over local fields with values in locally compact groups, satisfying a Pontrjagin duality. For certain weights, we give an ad hoc construction which satisfies such a duality unconditionally. Homepage del seminario: http://pagine.dm.unipi.it/tamas/saga.html Migliori saluti, Tamás Szamuely
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 16 febbraio ECCEZIONALMENTE alle 14:30 in Aula Mancini della Scuola Normale Superiore. Programma: ------------------ 14:30--15:30 Andrea Petracci (Bologna): Singularities on K-moduli spaces of Fano varieties Recently there has been spectacular progress, due to many scholars, on the construction of moduli (called K-moduli) of Fano varieties using K-stability (which is related to the existence of Kähler-Einstein metrics). It is a natural question to understand the geometry of these (newly constructed) spaces. Although smooth Fano varieties have unobstructed deformations, in joint work with Kaloghiros we constructed the first examples of obstructed K-polystable Fano varieties by using toric geometry. These give singular points on K-moduli of Fanos. In this talk I will try to explain these constructions; as a corollary I will show that K-moduli of Fano of dimension at least 3 can have arbitrarily many local branches. ----------------- Homepage del seminario: http://pagine.dm.unipi.it/tamas/saga.html Migliori saluti, Tamás Szamuely
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 2 marzo in Aula Magna del Dipartimento. Programma: 14:30--15:30 John Alexander Cruz Morales (Bogotà & Bonn): Towards a Dubrovin conjecture for Frobenius manifolds In this talk we will report on ongoing work aiming to establish a Dubrovin conjecture for general Frobenius manifolds. The Dubrovin conjecture was formulated in 1998 (with a very precise statement in 2018) as a relation between the Frobenius manifold coming from the quantum cohomology of a Fano manifold X and the derived category of coherent sheaves of X. We will give some speculations about how to extend that relation to one between semisimple Frobenius manifolds and some categories. We will sketch the situation in a particular example (3-point Ising model). 15:45--16:45 Andrea Di Lorenzo (Berlin): Quadratic invariants of moduli of elliptic curves The Chow ring of moduli of curves is an important invariant which is the subject of extensive investigations and conjectures, since Mumford first introduced the topic in his pioneering work. Chow-Witt groups are a recent refinement of the usual Chow group, and it is then a natural question to ask whether one can say something on the Chow-Witt groups of moduli of curves. In this talk, I would like to present a recent computation of the Chow-Witt ring of the moduli stack of smooth/stable elliptic curves and explain the meaning of the generators of these rings in terms of quadratic invariants of families of elliptic curves. Joint work with Lorenzo Mantovani. ----------------- Homepage del seminario: http://pagine.dm.unipi.it/tamas/saga.html Migliori saluti, Tamás Szamuely
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 2 marzo in Aula Magna del Dipartimento. Programma: 14:30--15:30 Giulio Bresciani (SNS Pisa): Two results about Grothendieck's Section Conjecture Grothendieck's Section Conjecture states that, if X is an hyperbolic curve over a field k finitely generated over Q, every section of the map π_1(X)→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 Q by Stix: we prove that if k is a number field and the Weil restriction of X to Q admits a rational map to a non-trivial Brauer-Severi variety, then X satisfies the conjecture. Secondly, if k is finitely generated over 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. NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely
Scusate, la data era sbagliata, rimando l'annuncio: il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 17 marzo in Aula Magna del Dipartimento. Programma: 14:30--15:30 Giulio Bresciani (SNS Pisa): Two results about Grothendieck's Section Conjecture Grothendieck's Section Conjecture states that, if X is an hyperbolic curve over a field k finitely generated over Q, every section of the map π_1(X)→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 Q by Stix: we prove that if k is a number field and the Weil restriction of X to Q admits a rational map to a non-trivial Brauer-Severi variety, then X satisfies the conjecture. Secondly, if k is finitely generated over 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. NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely ________________________________________ Da: Geometria_Pisa <geometria_pisa-bounces@fields.dm.unipi.it> per conto di Tamas Szamuely <tamas.szamuely@unipi.it> Inviato: giovedì 10 marzo 2022 16:02:24 A: geometria_pisa@fields.dm.unipi.it; dottorandi@dm.unipi.it; Gabriele Vezzosi; Umberto Zannier; luca.migliorini.math@gmail.com; Francesco Sala; michele.pernice@sns.it; guglielmo.nocera@sns.it; andrea.ferraguti@sns.it; Gregory James Pearlstein; Luca Morstabilini; Davide Lombardo; Giovanni Gaiffi; Andrea Maffei; giulio.bresciani@sns.it; giulio.grammatica@sns.it; jacobbb84@gmail.com; valerio.melani@unifi.it Oggetto: [Geometria_pisa] Seminario di geometria algebrica e aritmetica, 17/03/2022 Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 2 marzo in Aula Magna del Dipartimento. Programma: 14:30--15:30 Giulio Bresciani (SNS Pisa): Two results about Grothendieck's Section Conjecture Grothendieck's Section Conjecture states that, if X is an hyperbolic curve over a field k finitely generated over Q, every section of the map π_1(X)→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 Q by Stix: we prove that if k is a number field and the Weil restriction of X to Q admits a rational map to a non-trivial Brauer-Severi variety, then X satisfies the conjecture. Secondly, if k is finitely generated over 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. NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely _______________________________________________ Geometria_Pisa mailing list Geometria_Pisa@fields.dm.unipi.it https://fields.dm.unipi.it/listinfo/geometria_pisa
Scusate, questa è l'ultima mail: il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 16 marzo in Aula Magna del Dipartimento. Programma: 14:30--15:30 Giulio Bresciani (SNS Pisa): Two results about Grothendieck's Section Conjecture Grothendieck's Section Conjecture states that, if X is an hyperbolic curve over a field k finitely generated over Q, every section of the map π_1(X)→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 Q by Stix: we prove that if k is a number field and the Weil restriction of X to Q admits a rational map to a non-trivial Brauer-Severi variety, then X satisfies the conjecture. Secondly, if k is finitely generated over 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. NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely ________________________________________ Da: Geometria_Pisa <geometria_pisa-bounces@fields.dm.unipi.it> per conto di Tamas Szamuely <tamas.szamuely@unipi.it> Inviato: giovedì 10 marzo 2022 16:02:24 A: geometria_pisa@fields.dm.unipi.it; dottorandi@dm.unipi.it; Gabriele Vezzosi; Umberto Zannier; luca.migliorini.math@gmail.com; Francesco Sala; michele.pernice@sns.it; guglielmo.nocera@sns.it; andrea.ferraguti@sns.it; Gregory James Pearlstein; Luca Morstabilini; Davide Lombardo; Giovanni Gaiffi; Andrea Maffei; giulio.bresciani@sns.it; giulio.grammatica@sns.it; jacobbb84@gmail.com; valerio.melani@unifi.it Oggetto: [Geometria_pisa] Seminario di geometria algebrica e aritmetica, 17/03/2022 Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 2 marzo in Aula Magna del Dipartimento. Programma: 14:30--15:30 Giulio Bresciani (SNS Pisa): Two results about Grothendieck's Section Conjecture Grothendieck's Section Conjecture states that, if X is an hyperbolic curve over a field k finitely generated over Q, every section of the map π_1(X)→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 Q by Stix: we prove that if k is a number field and the Weil restriction of X to Q admits a rational map to a non-trivial Brauer-Severi variety, then X satisfies the conjecture. Secondly, if k is finitely generated over 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. NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely _______________________________________________ Geometria_Pisa mailing list Geometria_Pisa@fields.dm.unipi.it https://fields.dm.unipi.it/listinfo/geometria_pisa
Cari tutti, vi informo che purtroppo dobbiamo rimandare il seminario di domani a causa di un caso Covid nella famiglia dell'oratore. Vi comunicherò la nuova data più avanti. Molti saluti, Tamás ------------- Programma: 14:30--15:30 Giulio Bresciani (SNS Pisa): Two results about Grothendieck's Section Conjecture Grothendieck's Section Conjecture states that, if X is an hyperbolic curve over a field k finitely generated over Q, every section of the map π_1(X)→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 Q by Stix: we prove that if k is a number field and the Weil restriction of X to Q admits a rational map to a non-trivial Brauer-Severi variety, then X satisfies the conjecture. Secondly, if k is finitely generated over 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. NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely ________________________________________ Da: Geometria_Pisa <geometria_pisa-bounces@fields.dm.unipi.it> per conto di Tamas Szamuely <tamas.szamuely@unipi.it> Inviato: giovedì 10 marzo 2022 16:02:24 A: geometria_pisa@fields.dm.unipi.it; dottorandi@dm.unipi.it; Gabriele Vezzosi; Umberto Zannier; luca.migliorini.math@gmail.com; Francesco Sala; michele.pernice@sns.it; guglielmo.nocera@sns.it; andrea.ferraguti@sns.it; Gregory James Pearlstein; Luca Morstabilini; Davide Lombardo; Giovanni Gaiffi; Andrea Maffei; giulio.bresciani@sns.it; giulio.grammatica@sns.it; jacobbb84@gmail.com; valerio.melani@unifi.it Oggetto: [Geometria_pisa] Seminario di geometria algebrica e aritmetica, 17/03/2022 Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 2 marzo in Aula Magna del Dipartimento. Programma: 14:30--15:30 Giulio Bresciani (SNS Pisa): Two results about Grothendieck's Section Conjecture Grothendieck's Section Conjecture states that, if X is an hyperbolic curve over a field k finitely generated over Q, every section of the map π_1(X)→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 Q by Stix: we prove that if k is a number field and the Weil restriction of X to Q admits a rational map to a non-trivial Brauer-Severi variety, then X satisfies the conjecture. Secondly, if k is finitely generated over 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. NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely _______________________________________________ Geometria_Pisa mailing list Geometria_Pisa@fields.dm.unipi.it https://fields.dm.unipi.it/listinfo/geometria_pisa _______________________________________________ Geometria_Pisa mailing list Geometria_Pisa@fields.dm.unipi.it https://fields.dm.unipi.it/listinfo/geometria_pisa
Cari tutti, ecco l'annuncio di un convegno che si terrà presso nostro Dipartimento a luglio. Migliori saluti, Tamás Szamuely --- “Geometry and arithmetic of moduli spaces” University of Pisa, July 18 to 22, 2022 Organizing committee: Andrea Bandini, Francesco Sala, Tamás Szamuely, Mattia Talpo. The workshop aims to bring together experts and researchers interested in geometric and arithmetic aspects of moduli spaces and stacks, in a broad sense. It will consist of four mini-courses of three hours each, and six research talks pertaining to recent advances in this general area. It will take place at the Department of Mathematics of the University of Pisa, Italy. Participation in the workshop is limited to 55 people (including the speakers and organizers). If you are interested, please register at your earliest convenience from the workshop web page https://indico.cs.dm.unipi.it/event/15/ We have limited funds to support the accommodation of Ph.D. students and young postdocs: please inform us in the registration form if you need support. Deadline for Registration: May 15, 2022 Deadline for Requesting Support: April 30, 2022 Lecturers: Jarod Alper (University of Washington) Fabrizio Andreatta (Università Statale di Milano) Emmanuel Letellier (Université de Paris) Arne Smeets (KU Leuven) Speakers: Eloise Hamilton (University of Cambridge) Marc-Hubert Nicole (Université Caen Normandie) David Rydh (KTH Stockholm) Amos Turchet (Università degli Studi Roma 3) Maria Valentino (Università della Calabria) Paul Ziegler (University of Munich) Hoping to see you in Pisa! Andrea Bandini, Francesco Sala, Tamás Szamuely, Mattia Talpo
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 23 marzo in Aula Magna del Dipartimento. Programma: 14:30--15:30 Matthias Nickel (Pisa): Local positivity and effective Diophantine approximation 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. Il seminario posticipato di Giulio Bresciani si terrà il 30 marzo. NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 6 aprile in Aula Magna del Dipartimento. Programma: 14:30--15:30 Johannes Nicaise (KU Leuven and Imperial College London): Variation of stable birational type and bounds for complete intersections Abstract: This talk is based on joint work with John Christian Ottem. I will explain a generalization of results by Shinder on variation of stable birational types in degenerating families, and how this can be used to extend Schreieder's non-stable rationality bounds from hypersurfaces to complete intersections in characteristic zero. This technique yields new results already for complete intersections of quadrics. ------------- Poi ci sarà una pausa di 2 settimane e il seminario riprende il 27 aprile (con Marco D'Addezio). Il seminario posticipato di Giulio Bresciani si terrà (hopefully) l'11 maggio. NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely _______________________________________________ Geometria_Pisa mailing list Geometria_Pisa@fields.dm.unipi.it https://fields.dm.unipi.it/listinfo/geometria_pisa
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 27 aprile in Aula Magna del Dipartimento. Programma: 14:30--15:30 Marco D'Addezio (Paris): Parabolicity conjecture of F-isocrystals In the last years the theory of crystalline cohomology and F-isocrystals had a great development. I will present a new result concerning the algebraic monodromy groups of F-isocrystals. I will start with a quick introduction on crystalline cohomology, F-isocrystals, and overconvergent F-isocrystals. Subsequently, I will recall the definition of monodromy groups of F-isocrystals (which uses the theory of Tannakian categories) and in the end I will explain the main theorem, the applications, and some ideas of the proof. NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely _______________________________________________ Geometria_Pisa mailing list Geometria_Pisa@fields.dm.unipi.it https://fields.dm.unipi.it/listinfo/geometria_pisa
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 4 maggio in Aula Magna del Dipartimento. Programma: 14:30--15:30 Luca Schaffler (Roma 3): Boundary divisors in the stable pair compactification of the moduli space of Horikawa surfaces Per l'abstract cliccare qui: https://events.dm.unipi.it/event/71/ NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 18 maggio in Aula Magna del Dipartimento. Programma: 14:30--15:30 Giulio Bresciani (SNS Pisa): Two results about Grothendieck's Section Conjecture Per l'abstract cliccare qui: https://events.dm.unipi.it/event/73/ NUOVO homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely _______________________________________________ Geometria_Pisa mailing list Geometria_Pisa@fields.dm.unipi.it https://fields.dm.unipi.it/listinfo/geometria_pisa
Cari tutti, l'ultimo seminario di geometria algebrica e aritmetica di Pisa in questo semestre si terrà mercoledì 18 maggio ECCEZIONALMENTE in Aula Volterra della Scuola Normale Superiore (terzo piano). Programma: 14:30--15:30 Siddharth Mathur (Orsay): Searching for the impossible Azumaya algebra Per l'abstract cliccare qui: https://events.dm.unipi.it/event/72/ Homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely
Scusatemi, mercoledì 25 maggio in Aula Volterra. Il resto è corretto. ________________________________________ Da: Geometria_Pisa <geometria_pisa-bounces@fields.dm.unipi.it> per conto di Tamas Szamuely <tamas.szamuely@unipi.it> Inviato: giovedì 19 maggio 2022 10:54:02 A: geometria_pisa@fields.dm.unipi.it; dottorandi@dm.unipi.it; Gabriele Vezzosi; Umberto Zannier; luca.migliorini.math@gmail.com; Francesco Sala; michele.pernice@sns.it; guglielmo.nocera@sns.it; andrea.ferraguti@sns.it; Gregory James Pearlstein; Luca Morstabilini; Davide Lombardo; Giovanni Gaiffi; Andrea Maffei; giulio.bresciani@sns.it; giulio.grammatica@sns.it; jacobbb84@gmail.com; valerio.melani@unifi.it; luca.bruni@sns.it; Alberto Landi Oggetto: [Geometria_pisa] Seminario di geometria algebrica e aritmetica, 25/05/2022 Cari tutti, l'ultimo seminario di geometria algebrica e aritmetica di Pisa in questo semestre si terrà mercoledì 18 maggio ECCEZIONALMENTE in Aula Volterra della Scuola Normale Superiore (terzo piano). Programma: 14:30--15:30 Siddharth Mathur (Orsay): Searching for the impossible Azumaya algebra Per l'abstract cliccare qui: https://events.dm.unipi.it/event/72/ Homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely _______________________________________________ Geometria_Pisa mailing list Geometria_Pisa@fields.dm.unipi.it https://fields.dm.unipi.it/listinfo/geometria_pisa
Cari geometri pisani, vi segnalo questo convegno storico organizzato dal nostro collega Alberto Cogliati che si terrà i prossimi giovedì e venerdì in Aula Magna: http://www.albertocogliati.it/glimpses-of-geometry-pisa-29-30-september/ Programma: Giovedì 29 Settembre (Aula Magna, Dipartimento di Matematica) 14:00-14:45 Umberto Bottazzini: A state affair. Disputes and controversies among geometers around the 1901 Royal Prize. 14:45-15:30 Ciro Ciliberto: An overview on projective differential geometry in Italy around 1900. 15:30-16:15 Alberto Cogliati: Deformation problems for hypersurfaces around 1900: the contributions of Ricci-Curbastro, Bianchi and Bompiani. 16:15-16:45 Coffee Break 16:45-17:30 Rossana Tazzioli: Levi-Civita's treatises on the absolute differential calculus, 1925-1928 - research, teaching, dissemination. 17:30-18:15 Tilmann Sauer: How absolute was the absolute differential calculus? Venerdì 30 Settembre (Aula Magna, Dipartimento di Matematica) 8:30-9:15 Erika Luciano: Foreign inspiration and domestic tradition: the Göttingen speaking mathematicians in Turin. 9:15-10:00 Enrico Rogora: Entanglements between the theory of equations, elliptic functions and algebraic geometry in Italy, in the second half of the 19th century. 10:00-10:45 Riccardo Rosso: Eugenio Bertini: teacher and researcher during his stay in Pavia. 10:45-11:15 Coffee Break 11:15-12:00 Aldo Brigaglia: After Veronese and Cremona: the Cremona-Richmond configuration, via Segre. 12:00-12:45 Cinzia Cerroni: Some Italian algebraic geometers and abstract configurations Sul sito si possono trovare anche gli abstract. Migliori saluti, Tamás Szamuely
Cari tutti, il primo seminario di geometria algebrica e aritmetica di Pisa del quest'anno accademico si terrà mercoledì 5 ottobre in Aula Magna del Dipartimento. Programma: 15:00--16:00 Sam DeHority (Columbia University): Hecke correspondences and Lagrangian fibrations I will discuss a method to associate new algebraic structures with deformations to certain holomorphic Lagrangian fibrations, and describe their relation with other parts of mathematical physics. This algebraic structure controls the enumerative geometry of the variety admitting the Lagrangian fibration in a way analogous to how a quantum group controls the enumerative geometry of a symplectic singularity. Various questions, including the monodromy of the quantum differential equation, can be answered using local-to-global techniques. Homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely PS: Se manca l'indirizzo di qualcuno dalla mailing list, vi prego di segnalarmelo.
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 19 ottobre in Aula Magna del Dipartimento. Programma: 15:00--16:00 Ádám Gyenge (Budapest): The Heisenberg category of a category The Heisenberg algebra associated with a lattice is a much-investigated object originating in quantum theory. Khovanov introduced recently a categorification of the infinite Heisenberg algebra associated with the free boson or, equivalently, a rank 1 lattice, using a graphical construction involving planar diagrams. We extend Khovanov’s graphical construction to derived categories of smooth and projective varieties or, more generally, to categories having a Serre functor. In our case, the underlying lattice will be the (numerical) Grothendieck group of the category. We also obtain a 2-representation of our Heisenberg category on a categorical analogue of the Fock space. Joint work with Clemens Koppensteiner and Timothy Logvinenko. Homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 26 ottobre in Aula Mancini della Scuola Normale Superiore (ATTENZIONE AL LUOGO!). Programma: 15:00--16:00 Vasudevan Srinivas (Mumbai): On finite presentation for the tame fundamental group 16:30--17:30 Vijaylaxmi Trivedi (Mumbai): Hilbert-Kunz density function and its applications to some Hilbert-Kunz multiplicity conjectures Gli abstracts si trovano sulla Homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely _______________________________________________ Geometria_Pisa mailing list -- geometria_pisa@lists.dm.unipi.it To unsubscribe send an email to geometria_pisa-leave@lists.dm.unipi.it
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 9 novembre in Aula Magna del Dipartimento di Matematica. Programma: 15:00--16:00 David Harari (Orsay): Arithmetic of homogeneous spaces over global fields of characteristic p Abstract: Let K be the function field of a curve over a finite field, and let X be a homogeneous space of a reductive group over K. We discuss cohomological obstructions to the local-global principle on X. Similar results for weak and strong approximation will also be provided (joint work with Cyril Demarche). Homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely _______________________________________________ Geometria_Pisa mailing list -- geometria_pisa@lists.dm.unipi.it To unsubscribe send an email to geometria_pisa-leave@lists.dm.unipi.it _______________________________________________ Geometria_Pisa mailing list -- geometria_pisa@lists.dm.unipi.it To unsubscribe send an email to geometria_pisa-leave@lists.dm.unipi.it
Cari tutti, ho il piacere di annunciare il primo di una futura serie di incontri con colleghi di Milano che speriamo potere tenere regolarmente alternando tra le due sedi. Per il primo incontro gli speaker saranno 100% milanesi, ma abbiamo l'intenzione di invitare anche speaker esterni ai seminari seguenti. Quando: 16 novembre 15:00 - 17 novembre 12:30 Dove: Aula Magna del Dipartimento Che cosa: Mercoledì 16/11 15:00 Federico Binda: HKR theorem and residue sequences for logarithmic Hochschild homology 16:30 Alberto Vezzani: Homotopy theory of adic spaces and applications ---------- Giovedì 17/11 10:00 Rodolfo Venerucci: TBA 11:30 Paul Arne Ostvaer: A1-homotopy theory and contractible varieties Homepage: https://events.dm.unipi.it/event/109/ Spero saremo numerosi! Molti saluti, Tamás Szamuely
Cari tutti, Ecco il programma finale del primo incontro Milano--Pisa. Da notare: il cambio degli orari mercoledì pomeriggio. Quando: 16 novembre 15:00 - 17 novembre 12:30 Dove: Aula Magna del Dipartimento Che cosa: Mercoledì 16/11 15:30 Federico Binda: HKR theorem and residue sequences for logarithmic Hochschild homology 17:00 Alberto Vezzani: Homotopy theory of adic spaces and applications ---------- Giovedì 17/11 10:00 Rodolfo Venerucci: Endoscopy for GSp(4) and rational points on elliptic curves 11:30 Paul Arne Ostvaer: A1-homotopy theory and contractible varieties Homepage: https://events.dm.unipi.it/event/109/ Spero saremo numerosi! Molti saluti, Tamás Szamuely
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 23 novembre in Aula Magna del Dipartimento di Matematica. Programma: 15:00--16:00 Andrea Ricolfi (Trieste): Quot schemes and their d-critical structure(s) 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. Homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely
Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 30 novembre in Aula Magna del Dipartimento di Matematica. Ci saranno due ospiti: 15:00--16:00 Antonella Grassi (Bologna): A family of threefolds with remarkable properties (namely: the unreasonable effectiveness of the Schoens) 16:30--17:30 James Lewis (Edmonton): The complexity of higher Chow groups Gli abstract sit trovano sul homepage del seminario: https://indico.cs.dm.unipi.it/category/4/ Migliori saluti, Tamás Szamuely
participants (2)
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Francesco Sala -
Tamas Szamuely