Geometria_Pisa

geometria_pisa@lists.dm.unipi.it

2 participants
768 discussions

Seminario di geometria oggi
by Filippo Bianchi 15 Jun '23

15 Jun '23

Carə tuttə, Scusandomi per il poco preavviso, vi ricordo che oggi 15 Giugno in Aula Seminari alle 11 si terrà il seminario di Marco Moraschini (Università di Bologna) dal titolo "Acyclicity in bounded cohomology". Di seguito l'abstract. Bounded cohomology is an invariant of groups introduced by Johnson in the 70s and then extensively studied both in geometric group theory and in low dimensional topology after the pioneering paper by Gromov (1982). Bounded cohomology is known to vanish in presence of amenable groups, but it is hard to compute for most groups (e.g. we do not know the full bounded cohomology of the non-abelian free group with two generators). In this talk we will introduce bounded cohomology and discuss some recent computations involving boundedly acyclic groups (i.e. groups with trivial bounded cohomology in all positive degrees). We will report some results in collaboration with Francesco Fournier-Facio, Clara Löh and George Raptis. Ricordiamo che le informazioni sui prossimi seminari si trovano sul sito<https://www.dm.unipi.it/categoria-evento/geometry-seminar/>. Il seminario successivo sarà Giovedì 22 Giugno in Aula Seminari alle 11: avremo Francesco Lin (Columbia University), che ci parlerà di "Homology cobordism and the geometry of hyperbolic three-manifolds". Vi aspettiamo! Buona giornata, Alice, Filippo e Giuseppe

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postdoctoral fellowship in Bologna
by Martino Lupini 08 Jun '23

08 Jun '23

Dear all, Another post-doctoral fellowship (assegno di ricerca) at the University of Bologna on interactions between topology, homological algebra, and logic has just been advertised. (This is different from the one that was advertised in April!) https://bandi.unibo.it/ricerca/assegni-ricerca?id_bando=66430 This position is co-funded by the Department of Mathematics and the ERC project "Definable Algebraic Topology". The duration of the position is 1 year, with the possibility of being extended up to 3 years. The application deadline is June 23, 2023. Please feel free to forward this information to anyone who might be interested. I will be happy to answer any questions about this opportunity. Best, Martino

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Niente seminario di geometria domani
by Filippo Bianchi 07 Jun '23

07 Jun '23

Carə tuttə, Il seminario annunciato per domani 8 Giugno NON si terrà. Ricordiamo che le informazioni sui prossimi seminari si trovano sul sito<https://www.dm.unipi.it/categoria-evento/geometry-seminar/>. Il seminario successivo sarà Giovedì 15 Giugno in Aula Seminari alle 11: avremo Marco Moraschini (Università di Bologna), che ci parlerà di "Acyclicity in bounded cohomology". Vi aspettiamo! Buona giornata, Alice, Filippo e Giuseppe

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Fwd: [gdrtresses] Rencontres du GDR à Marseille du 28 aout au 1er septembre (deuxième annonce)
by Bruno Martelli 06 Jun '23

06 Jun '23

---------- Forwarded message --------- Da: wagner(a)imj-prg.fr <wagner(a)imj-prg.fr> Date: Mar 6 Giu 2023, 14:47 Subject: [gdrtresses] Rencontres du GDR à Marseille du 28 aout au 1er septembre (deuxième annonce) To: gdrtresses(a)listes.math.cnrs.fr <gdrtresses(a)listes.math.cnrs.fr> (English version below) Chères et chers et collègues, Nous avons le plaisir de vous annoncer que les journées 2023 du GDR Tresses se tiendront à Marseille du lundi 28 août au vendredi 1er septembre 2023. En plus d'une dizaine d'exposés courts d'une demi-heure proposés par les participants, les journées comporteront deux mini-cours sur la thématique des surfaces en dimension 4: - Plongements de surfaces en dimension quatre, par Mark Powell (University of Glasgow); - Une approche combinatoire des surfaces nouées en dimension 4, par Jean- Baptiste Meilhan (Université de Grenoble Alpes); ainsi que cinq exposés pléniers sur les thèmes du GDR: - Noémie Legout (Uppsala Universitet); - Mélanie Theillière (Université du Luxembourg); - Filippo Calegaro (Universita di Pisa); - Bruno Martelli (Universita di Pisa); - Marco de Renzi (University of Zurich). Proche du centre-ville, et donnant sur la mer, tous les exposés auront lieu dans la station marine d'Endoume. Une aide financière est possible pour le logement des jeunes participants. Les inscriptions sont ouvertes jusqu'au 1er juillet 2023 à l'adresse suivante: https://tresses2023.sciencesconf.org/. N'hésitez pas à relayer l'information autour de vous, notamment dans vos laboratoires. Le comité d'organisation, Delphine Moussard Benjamin Audoux Emmanuel Wagner --------------------------------------------------------------------------------------------------------------- Dear colleagues, We are pleased to announce that the GDR Tresse will organize an international conference on Surfaces and manifolds in dimension 4 and, more generally, on the topics of the GDR. This conference will take place in Marseille from Monday 28th of August to Friday 1st of September. Besides a dozen short talks (1/2h), the conference will yield two mini- courses: - Embeddings of surfaces in dimension 4, by Mark Powell (University of Glasgow); - A combinatorial approach to knotted surfaces in 4-space, by Jean-Baptiste Meilhan (Université de Grenoble Alpes); as well as five plenary talks (1h) on the other thematics of the GDR: - Noémie Legout (Uppsala Universitet); - Mélanie Theillière (Université du Luxembourg); - Filippo Calegaro (Universita di Pisa); - Bruno Martelli (Universita di Pisa); - Marco de Renzi (University of Zurich). Near from downtown and overlooking the sea, all the talks will take place at the Marine Station of Endoume. Some financial support for the lodging of younger participants is available. Registration is open until July 1st 2023 at the following address: https://tresses2023.sciencesconf.org/. Please, do relay the information around you, and especially in your laboratories. The organizing committee Delphine Moussard Benjamin Audoux Emmanuel Wagner

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Convegno UMI - Sezione topologia e geometria differenziale
by Bruno Martelli 06 Jun '23

06 Jun '23

Buondì, Nell'ambito del Convegno UMI a Pisa del 4-9 settembre, la sezione di topologia e geometria differenziale sarà attiva nei giorni lunedì 4 (pomeriggio) e martedì 5 (mattina e pomeriggio), con i seguenti speaker: Paolo Aceto Nicola Cavallucci Federica Fanoni Marco Moraschini Mario Santili Leone Slavich Andrea Tamburelli A presto, Bruno Martelli

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Fwd: [gdrtresses] Post-doctoral Position Dijon
by Bruno Martelli 02 Jun '23

02 Jun '23

---------- Forwarded message --------- From: wagner(a)imj-prg.fr <wagner(a)imj-prg.fr> Date: Fri, Jun 2, 2023 at 5:22 PM Subject: [gdrtresses] Post-doctoral Position Dijon To: gdrtresses(a)listes.math.cnrs.fr <gdrtresses(a)listes.math.cnrs.fr> A one-year post-doctoral position at the Institute of Mathematics of Burgundy will be funded by the ANR for the ANR-T-ERC project "New Applications of Quantum Invariants to 3- and 4-dimensional Topology". Applications displaying expertise in one or more of the following fields will be particularly appreciated: Quantum invariants, mapping class groups of surfaces, homology of configuration spaces, concordance, trisections, skein modules. The deadline for applications will be June 30th 2024 and the contract can start between October 1st 2023 and January 1st 2024. Applicants must send a CV with a list of publications, a short summary of previous research and projects, and a cover letter to renaud.detcherry(a)u-bourgogne.fr For more information on the position, please visit the webpage: https://math.u-bourgogne.fr/wp-content/uploads/2023/06/PostdocOffer.pdf

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Seminario di Geometria 1 Giugno Aula Magna
by Filippo Bianchi 31 May '23

31 May '23

Carə tuttə, Vi ricordo che domani 1 Giugno in Aula Magna si terrà il seminario di Andrew Lobb (Durham University) dal titolo "Four-sided pegs fitting round holes fit all smooth holes". Di seguito l'abstract. Given a smooth Jordan curve and a cyclic quadrilateral (a cyclic quadrilateral is a quadrilateral that can be inscribed in a circle) we show that there exist four points on the Jordan curve forming the vertices of a quadrilateral similar to the one given. No prior knowledge of anything assumed. Joint work with Josh Greene. Ricordiamo che le informazioni sui prossimi seminari si trovano sul sito. Il seminario successivo sarà Giovedì 8 Giugno in Aula Seminari alle 11: avremo Arunima Ray (MPIM Bonn), e il titolo del talk sarà "Topologically slice knots in simply connected 4-manifolds". Vi aspettiamo! Buona giornata, Alice, Filippo e Giuseppe

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[Indico] Bruno Benedetti, Vertex labeling properties on simplicial complexes, 31/05/2023, 15:00 Europe/Rome
by francesco.sala＠unipi.it 29 May '23

29 May '23

Title: Vertex labeling properties on simplicial complexes, Speaker(s): Bruno Benedetti, University of Miami, Date and time: 31 May 2023, 15:00 (Europe/Rome), Lecture series: Seminar on Combinatorics, Lie Theory, and Topology, Venue: Department of Mathematics (Aula Magna). You can access the full event here: https://events.dm.unipi.it/e/194 Abstract -------- Hamiltonian graphs are graphs where one can find a closed walk that touches all vertices exactly once. Equivalently, they are the graphs whose vertices can be labeled from 1 to n so that all of 12, 23, 34, …, n1 feature among the edges. This second definition has the advantage that it can be extended to simplicial complexes of dimension higher than one. Similarly, one can extend to complexes many other famous properties of graph theory (like chordality or being interval) which can be characterized via vertex labelings. We extend to all dimensions the famous result that all unit-interval 2-connected graphs are Hamiltonian. If time permits, we also discuss how to characterize unit-interval graphs and complexes in algebraic terms (i.e. in terms of Groebner bases of determinantal ideals). This is joint work with Matteo Varbaro and Lisa Seccia. -- Indico :: Email Notifier https://events.dm.unipi.it/e/194

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Seminario di geometria domani
by Filippo Bianchi 24 May '23

24 May '23

Carə tuttə, Vi ricordo che domani 18 Maggio in Aula Seminari si terrà il seminario di Diego Santoro (SNS Pisa) dal titolo "L-spaces, taut foliations and fibered hyperbolic two-bridge links". Di seguito l'abstract. Heegaard Floer homology was defined by Ozsváth and Szabó in the early 2000s. It consists of a package of invariants of closed oriented 3-manifolds and it has found many important and profound applications in low dimensional topology. I will introduce the L-space conjecture, that boldly predicts strong connections among properties relating Heegaard Floer homology, foliations and the fundamental group of an irreducible rational homology 3-sphere. I will then state a result concerning this conjecture for manifolds that arise as surgeries on fibered hyperbolic two-bridge links. We will also see how to apply this result to deduce that all non-meridional surgeries on Whitehead doubles of a non-trivial knot support coorientable taut foliations. Ricordiamo che le informazioni sui prossimi seminari si trovano sul sito<https://www.dm.unipi.it/categoria-evento/geometry-seminar/>. Il seminario successivo sarà Giovedì 01 Giugno in Aula Seminari alle 11: avremo Andrew Lobb (Durham University), e il titolo del talk sarà "Four-sided pegs fitting round holes fit all smooth holes". Vi aspettiamo! Buona giornata, Alice, Filippo e Giuseppe

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PhD positions in Bologna
by Martino Lupini 24 May '23

24 May '23

Dear all, A call for applications for 12 PhD positions at the University of Bologna has just been announced, with deadline June 20, 2023. Italian version: https://www.unibo.it/it/didattica/dottorati/2023-2024/matematica English version: https://www.unibo.it/en/teaching/phd/2023-2024/mathematics One of these positions is funded by the ERC project "Definable algebraic topology" and is reserved for candidates who plan to work on this project, which focuses on interactions between logic, algebraic topology, and homological algebra. Please feel free to forward this announcement to anyone who might be interested. I will be happy to answer any question anyone might have on this opportunity. Best, Martino

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Geometria_Pisa