Geometria_Pisa

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2 participants
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seminario mercoledì
by Bruno Martelli 06 Jul '15

06 Jul '15

buondì, vi annuncio il seminario di geometria di mercoledì prossimo (dopodomani). a presto, Bruno ------ 08-Jul-2015 - 16:00 Sala Seminari (Dip. Matematica) Kyle Larson (Austin, Texas) Torus surgery in the 4-sphere I will introduce the operation of torus surgery in the 4-sphere, and describe some recent results concerning which 4-manifolds can be produced in this way and the uniqueness of such descriptions. As a motivation I will discuss analogous results and problems about Dehn surgery on knots in the 3-sphere. I will also discuss some applications to embedding 3-manifolds into 4-manifolds.

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seminario domani
by Bruno Martelli 30 Jun '15

30 Jun '15

buondì, vi annuncio il seminario di geometria di domani. Per colpa mia titolo e abstract non erano presenti nel notiziario di venerdì. a presto, Bruno ----- 01-Jul-2015 - 16:00 Sala Seminari (Dip. Matematica) Marco Golla Twisting (Heegaard Floer) correction terms Correction terms in Heegaard Floer homology are rational numbers associated to rational homology spheres, introduced by Ozsváth and Szabó (inspired by the work of Frøyshov in Seiberg-Witten theory). These invariants have been used to study the topology of 4-manifolds whose boundary is a rational homology sphere. We use twisted coefficients to generalise this construction to arbitrary 3-manifolds, and give some applications. This is joint work with Stefan Behrens.

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Call for tenure-track associate prof. position in Geometry in Rome (fwd)
by Roberto Frigerio 23 Jun '15

23 Jun '15

Ricevo e inoltro il seguente annuncio per un posto da ricercatore di tipo B presso l'Univ. La Sapienza di Roma. Roberto ---------- Forwarded message ---------- Date: Tue, 23 Jun 2015 12:20:19 +0200 From: "Mondello, Gabriele" <mondello(a)mat.uniroma1.it> To: undisclosed-recipients: ; Subject: Call for tenure-track associate prof. position in Geometry in Rome Dear Colleague, I am writing to advertise the following call for 1 RTD-B (tenure-track associate professor) position at the Department of Mathematics of "Sapienza" Università di Roma. Candidates are required to have 3 years of experience as post-doc researchers. Deadline for application: 20 July 2015. Details can be found following the link below (in Italian): * Procedura selettiva di chiamata per 2 posti di ricercatore a tempo determinato, di tipologia B, presso il dipartimento di Matematica - settore s/d MAT/03 e MAT/07 - settore conc. 01/A2 e 01/A4 - pubblicato sulla Gazzetta Ufficiale IV serie speciale n. 46 del 19/06/2015 - Bando [300KB] - Allegati [MAT/03 means "geometry", 01/A2 means "algebra and geometry".] Please, feel free to forward the present announcement to anyone who might be interested. Thank you! Best regards, Gabriele Mondello -- ------------------------------- Gabriele Mondello Dipartimento di Matematica "Sapienza" Università di Roma Piazzale Aldo Moro 5 00185 Roma - Italy Tel: (+39) 06 4991 3283 Email: mondello(a)mat.uniroma1.it -------------------------------

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[gdrtresses] One year post-doctoral position in Grenoble (fwd)
by Roberto Frigerio 23 Jun '15

23 Jun '15

Ricevo e inoltro, Roberto ---------- Forwarded message ---------- Date: Fri, 19 Jun 2015 18:28:27 +0200 From: louis.funar(a)ujf-grenoble.fr To: gdrtresses(a)listes.math.cnrs.fr Subject: [gdrtresses] One year post-doctoral position in Grenoble One year post-doctoral position at Universite of Grenoble (France) starting September/October 2015, supported by European Research Council (ERC) • Institution: Universite de Grenoble (France) • Department : Institut Fourier http://www-fourier.ujf-grenoble.fr/ • Contact: Professor Gerard Besson • Employer Type : Academic • Position Type : Post-Doctorate • Subject Area : Mathematics • Geographic Location : Grenoble, France • Position Description : 12 months Post-doctoral position • Teaching load : none • Salary: about 30 000 Euros net salary per year Please read carefully the text below Applicants should be working in the following areas: geometry, geometric flows, low dimensional topology. An interest in the study of the geometry of open 3-manifolds will be appreciated. The postdoc will devote most of his time to research, and will participate to the department activities. Teaching a graduate course may be asked to the postdoc. In addition to his salary, the post-doc will be eligible for additional travel and equipment funding from the grant resources. Finally, French language courses may be provided to the post- doctoral fellow if necessary. Applicants are expected to have graduated with a Ph.D. or equivalent doctoral program by the end of August 2015. Applicants who have graduated before September 2009 are not eligible. For further information, please contact one of the two persons below: • Geraldine Rahal at Geraldine.Rahal(a)ujf-grenoble.fr • Gerard Besson at G.Besson(a)ujf-grenoble.fr Your application should contain: 1. a vitae containing basic data including your birthdate, your citizen- ship, and present country of residence 2. a list of publications together with the links to the publications 3. a cover letter explaining why you would like to visit Grenoble, and why you think your application should be considered for this specific position 4. a short (2/3 pages) description of your past research 5. a short (2/3 pages) research project 6. one letter of recommendation The above items should be sent by e-mail with Getom in the subject line to the 2 addresses Geraldine.Rahal(a)ujf-grenoble.fr, G.Besson@ujf- grenoble.fr. Your application should be received at the latest on June 27th 2015. The candidates will be informed as soon as possible.

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CORREZIONE ORARIO , seminario François Costantino [Baby Geometri].
by Antonio Alfieri 15 Jun '15

15 Jun '15

Ciao a tutti, ho fatto un errore nella comunicazione questa mattina, il seminario dei Baby Geometri di domani (François Costantino) è come al solito alle 18.00 (non alle 16.00 come vi avevo comunicato questa mattina). Mi scuso per il disagio!!! Antonio Alfieri

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seminari di giovedi'
by Rita Pardini 15 Jun '15

15 Jun '15

Ricordo i seguenti seminari. Ciao, Rita =============================== Giovedi' 18 giugno, sala seminari: ORE 10: Antonella Grassi (University of Pennsylvania): "Fibrazioni ellittiche di varieta' di Calabi-Yau 3folds, algebre di Lie e rappresentazioni collegate". ABSTRACT: i punti doppi razionali, (singolarita' di Klein o du Val) sono classificati da diagrammi di Dynkin di certe algebre di Lie; queste sono anche le singolarita' dei modelli di Weierstrass di superfici ellittiche. La struttura di algebra di Lie si manifesta, con certe rappresentazioni, nel caso di varieta' di Calabi-Yau 3folds $X$ ellittiche, dimostriamo che questo appaia in una formula per $\chi_{top}(X)$ ed esporremo in termini matematici alcune congetture proveniente dalle "anomalies cancellation in physics". [Basato su lavori in collaborazione con D. Morrison; J.Halverson e J. Shaneson] ORE 11.30: Julius Shaneson (University of Pennsylvania) "Topological String Junctions" A topological foundation/interpretation is provided for the the algebraic notion of string junctions. This new approach permits the analysis of elliptic fibrations using deformations rather than resolutions. As a result we obtain the associated gauge algebras, their representation, Dynkin diagrams, root systems, etc., first for complex codimension one singularities and then for higher codimension strata in the singular set, for example corresponding to the G_2 gauge group or for the "III-IV-I" collision (with A. Grassi, J. Halverson and W. Taylor). -- Rita Pardini Dipartimento di Matematica Università di Pisa http://www.dm.unipi.it/~pardini

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Seminario François Costantino [Baby Geometri]
by Antonio Alfieri 15 Jun '15

15 Jun '15

Ciao a tutti, vi segnalo che il seminario dei Baby Geometri di questa settimana si terrà Martedì 16 alle ore 16.00 in aula seminari del Dipartimento di Matematica. --------------------------------------------------------- Speaker:François Costantino Titolo: Un'introduzione all'integrazione Gaussiana Riassunto: Dopo aver ricordato i fatti di base sull'integrazione gaussiana, parleremo del teorema di Wick e della sua applicazione che porta allo sviluppo in termini di diagrammi di Feynmann di integrali formali. Se possibile faremo alcuni esempi di applicazione di queste idee all'enumerazione di oggetti topologico/combinatorici. ----------------------------------------------------------- Vi aspettiamo numerosi, Gli organizzatori.

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seminario *martedi mattina*
by Bruno Martelli 14 Jun '15

14 Jun '15

buondì, siete invitati al seminario seguente, che si terrà *martedi* mattina alle 11 (mercoledì è festa). martedi 16-Jun-2015, ore 11:00 Aula Magna (Dip. Matematica) Francesco Costantino (Università di Toulouse) Titolo: TQFT non semi-semplici Riassunto: Dopo aver rapidamente ricordato cos'è una TQFT e come costruirne alcune, ricorderemo alcuni degli aspetti salienti della teoria delle rappresentazioni del gruppo quantico U_q(sl_2) per poi spiegare come questi aspetti sono rispecchiati nella topologia. Discuteremo quindi la costruzione di invarianti "non semisemplici" di 3-varietà basati su questa teoria delle rappresentazioni e della costruzione delle TQFT associate a questi invarianti. Se il tempo lo permette discuteremo alcune proprietà di tali TQFT e le connetteremo ad ai recenti lavori di Bonahon e Wong. (Collaborazione con C. Blanchet, N. Geer e B. Patureau)

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Workshop in Luxembourg, July 13-15, 2015 (fwd)
by Roberto Frigerio 11 Jun '15

11 Jun '15

Ricevo e inoltro questo avviso di workshop. Roberto ---------- Forwarded message ---------- Date: Wed, 10 Jun 2015 09:23:58 +0200 From: Jean-Marc Schlenker <jeanmarc.schlenker(a)gmail.com> Reply-To: jean-marc.schlenker(a)uni.lu To: Thierry BARBOT <thierry.barbot(a)univ-avignon.fr>, Olivier Guichard <olivier.guichard(a)math.unistra.fr>, Gilles Courtois <courtois(a)math.jussieu.fr>, Bruno Colbois <Bruno.Colbois(a)unine.ch>, Ruth KELLERHALS <ruth.kellerhals(a)unifr.ch>, Hugo Parlier <hugo.parlier(a)gmail.com>, Marc Troyanov <marc.troyanov(a)epfl.ch>, Marc Burger <burger(a)math.ethz.ch>, Alessandra Iozzi <aiozzi(a)ethz.ch>, Tamas Hausel <tamas.hausel(a)epfl.ch>, Norbert A'Campo <norbert.acampo(a)unibas.ch>, Simon Salamon <salamon(a)calvino.polito.it>, Francesco Bonsante <francesco.bonsante(a)unipv.it>, Gabriele Mondello <mondello(a)mat.uniroma1.it>, riccardo benedetti <benedett(a)dm.unipi.it>, Andrea Seppi <sep88jr(a)gmail.com>, Bruno Martelli <martelli(a)dm.unipi.it>, Roberto Frigerio <frigerio(a)dm.unipi.it>, Carlo Petronio <petronio(a)dm.unipi.it>, Marco Spinaci <spinaci(a)mpim-bonn.mpg.de>, Daniele Alessandrini <daniele.alessandrini(a)gmail.com>, Ana Peon <apeonnieto(a)mathi.uni-heidelberg.de>, Anna Wienhard <wienhard(a)mathi.uni-heidelberg.de>, "ursula(a)math.uni-bonn.de" <ursula(a)math.uni-bonn.de>, Catherine Meusburger <catherine.meusburger(a)math.uni-erlangen.de>, Joel Fine <joel.fine(a)ulb.ac.be>, Carlos Scarinci <cyscarinci(a)gmail.com>, GLORIEUX Olivier <olivier.glorieux(a)imj-prg.fr>, Selim GHAZOUANI <selim.ghazouani(a)ens-lyon.fr> Cc: Nicolas THOLOZAN <nicolas.tholozan(a)uni.lu>, Jérémy TOULISSE <jeremy.toulisse(a)uni.lu> Subject: Workshop in Luxembourg, July 13-15, 2015 Dear colleagues, We are organizing a short workshop in Luxembourg, July 13-15, on ********************************************************** 3-dimensional Geometric Structures, Representations of Surface Groups and related topics ********************************************************** The speakers are: Francis Bonahon (University of Southern California) Francesco Bonsante (Università di Pavia) Richard Canary (University of Michigan) Jeffrey Danciger (University of Texas) Vladimir Fock (Université de Strasbourg) (to be confirmed) Jonah Gaster (Boston Colllege) Olivier Guichard (Université de Strasbourg) Colin Guillarmou (École Normale Supérieure de Paris) Cyril Lecuire (University of Toulouse) Sara Maloni (Brown University) Greg McShane (Institut Fourier, Grenoble) Andrea Seppi (Università di Pavia) If you wish to attend, please register on the website: http://math.uni.lu/~tholozan/AfficheConf_1507/Juillet2015.html where the schedule will soon be available. Limited financial support is available, with priority given to younger participants (PhD students and postdocs). We would be grateful if you could forward this message to whoever could be interested in participating. Best wishes, The organizers: Jean-Marc Schlenker, Nicolas Tholozan, Jérémy Toulisse. --------------------------------------- Chers collègues, Nous organisons du 13 au 15 juillet à Luxembourg un petit workshop sur le thème : ********************************************************** 3-dimensional Geometric Structures, Representations of Surface Groups and related topics ********************************************************** Les orateurs invités sont : Francis Bonahon (University of Southern California) Francesco Bonsante (Università di Pavia) Richard Canary (University of Michigan) Jeffrey Danciger (University of Texas) Vladimir Fock (Université de Strasbourg) (à confirmer) Jonah Gaster (Boston Colllege) Olivier Guichard (Université de Strasbourg) Colin Guillarmou (École Normale Supérieure de Paris) Cyril Lecuire (University of Toulouse) Sara Maloni (Brown University) Greg McShane (Institut Fourier, Grenoble) Andrea Seppi (Università di Pavia) Si vous souhaitez participer, merci de vous inscrire sur http://math.uni.lu/~tholozan/AfficheConf_1507/Juillet2015.html où le programme sera disponible prochainement. Un soutien financier limité reste possible, en priorité pour les jeunes participants (doctorants et postdocs). Nous vous serions reconnaissant de faire suivre ce message à ceux qui pourraient être intéressés. Bien cordialement, Les organisateurs : Jean-Marc Schlenker, Nicolas Tholozan, Jérémy Toulisse. -- Jean-Marc Schlenker +352 46 66 44 5438 University of Luxembourg, Campus Kirchberg Mathematics Research Unit, BLG 6, rue Richard Coudenhove-Kalergi, L-1359 Luxembourg http://math.uni.lu/schlenker/

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due seminari giovedi
by Bruno Martelli 09 Jun '15

09 Jun '15

buondì, giovedi mattina ci saranno due seminari di geometria, entrambi in sala seminari. a presto, Bruno ============ Giovedi' 18 giugno, sala seminari: ORE 10: Antonella Grassi (University of Pennsylvania): "Fibrazioni ellittiche di varieta' di Calabi-Yau 3folds, algebre di Lie e rappresentazioni collegate". ABSTRACT: i punti doppi razionali, (singolarita' di Klein o du Val) sono classificati da diagrammi di Dynkin di certe algebre di Lie; queste sono anche le singolarita' dei modelli di Weierstrass di superfici ellittiche. La struttura di algebra di Lie si manifesta, con certe rappresentazioni, nel caso di varieta' di Calabi-Yau 3folds $X$ ellittiche, dimostriamo che questo appaia in una formula per $\chi_{top}(X)$ ed esporremo in termini matematici alcune congetture proveniente dalle "anomalies cancellation in physics". [Basato su lavori in collaborazione con D. Morrison; J.Halverson e J. Shaneson] ORE 11.30: Julius Shaneson (University of Pennsylvania) "Topological String Junctions" A topological foundation/interpretation is provided for the the algebraic notion of string junctions. This new approach permits the analysis of elliptic fibrations using deformations rather than resolutions. As a result we obtain the associated gauge algebras, their representation, Dynkin diagrams, root systems, etc., first for complex codimension one singularities and then for higher codimension strata in the singular set, for example corresponding to the G_2 gauge group or for the "III-IV-I" collision (with A. Grassi, J. Halverson and W. Taylor).

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