# Previous Seminars and Working Groups

## Geometry and Topology Seminar

- July 24, 2020 == Livio Liechti, Université de Fribourg

*Divide knots of maximal genus defect*- slides and talk - July 17, 2020 == Joshua Howie, UC Davis

*Alternating genera of torus knots*- talk - July 10, 2020 == Gabriele Mondello, Università di Roma, La Sapienza

*On spherical surfaces of genus 1 with 1 conical point*- slides - July 3, 2020 == Nicolina Istrati, Tel Aviv University

*Variational problems in conformal geometry*- slides and talk - June 26, 2020 == Martin Bobb, UT Austin

*Decomposition along flats for convex projective manifolds*- talk - June 19, 2020 == Vaibhav Gadre, University of Glasgow

*Statistical hyperbolicity of Teichmuller spaces*- slides and talk - June 12, 2020 == Eiji Inoue, Tokyo

*mu-cscK metrics and muK-stability of polarized manifolds*- slides and talk - June 5, 2020 == Ben Weinkove, Northwestern

*The Chern-Ricci flow*- slides and talk - May 29, 2020 == Lukas Lewark, Regensberg

*Squeezed knots*- slides and talk - May 22, 2020 == Patrick Orson, Boston College

*Topologically embedding spheres in knot traces* - May 15, 2020 == Ekatarina Amerik, Paris Sud and HSE Moscow

*Around the cone conjecture for hyperkähler manifolds*- slides - May 8, 2020 == Henri Guenancia, CNRS, Toulouse
*Families of singular Kähler-Einstein metrics*- slides - March 6, 2020 == Clayton McDonald, Boston College

*Doubly slice odd pretzel knots* - February 21, 2020 == Artour Tomberg, University of Western Ontario

*Vector bundles on twistor spaces of hyperkähler manifolds* - February 14, 2020 == Joel Kamnitzer, University of Toronto

*Symplectic duality and the Hikita Conjecture* - February 7, 2020, 10:00 == Gavin Ball, CIRGET, UQAM

*Closed G2-structures inducing a conformally flat metric* - January 31, 2020 == Michael Albanese, CIRGET, UQAM

*Almost Complex Structures on Rational Homology Spheres* - January 24, 2020 == Michael Lipnowski, McGill

*The Seiberg-Witten equations and the length spectrum of hyperbolic three-manifolds* - January 17, 2020 == Tyrone Ghaswala, CIRGET

*Infinite-type surfaces and the arcs that survive* - December 6, 2019 == Lars Sektnan, Aarhus University

*Optimal symplectic connections on holomorphic submersions* - November 29, 2019 == Thomas Hockenhull, University of Glasgow

*Koszul duality and Knot Floer homology* - November 22, 2019, 10:00 == Ahmad Issa, UBC

*Embedding Seifert fibered spaces in the 4-sphere* - November 22 2019 == Sungmo Kang, University of Texas at Austin

*Hyperbolic primitive/Seifert knots in the 3-sphere* - November 8, 2019 == Andrei Moroianu, Paris 11

*Weakly complex homogeneous spaces* - November 1, 2019 == Kenji Fukaya, Kyoto University

*Virtual fundamental chain and its application* - October 18, 2019 == Fei Hu, Waterloo

*Dynamical degrees of self-maps on abelian varieties* - October 11, 2019 == Maxence Mayrand, University of Toronto

*Symplectic reduction, GIT quotients, and Nahm’s equations* - October 4, 2019, 10:00 ==Kang Zuo, Mainz

*A p-adic characterization of modular curves* - October 4, 2019 == Georges Dloussky, Marseille

*Positive (1,1) currents on some non-Kähler compact complex surfaces* - September 27, 2019 == Gerard Freixas, Institut de mathématiques de Jussieu
*On the BCOV invariant of Calabi-Yau manifolds* - September 20, 2019, 10:00 == Michael Brandenbursky, Ben-Gurion University

*Fragmentation norm and relative quasimorphisms* - September 20, 2019 == Jen Hom, Georgia Tech

*More concordance homomorphisms from knot Floer homology* - September 13, 2019 == Artem Kotelskiy

*Immersed curves in Khovanov homology* - September 13, 10:00 == Linh Truong, Institute for Advanced Study

*An infinite rank summand of the homology cobordism group* - September 11, 2019 == Brendan Owens, University of Glasgow

*Embeddings of rational balls* - September 9, 2019 == Mike Willis, UCLA

*Defining Khovanov homology and Rasumussen’s invariant in #*^{r}(S^{1}x S^{2}) - September 6, 2019 == David Calderbank, Bath

*GL2 geometries and quaternionic manifolds with symmetry* - September 6, 2019 at 10:00 == Ian Zemke, Princeton

*Ribbon concordances and knot Floer homology* - August 23, 2019 == Shu-Cheng Chang, National Taiwan University
*Yau’s Uniformization Conjecture in Sasakian Manifolds* - May 10, 2019 == Xi Chen, University of Alberta

*Rational curves on K3 surfaces* - May 3, 2019 == Fangyang Zheng, Ohio State

*Strominger connection and pluriclosed metrics* - April 26, 2019 == Carlo Gasbarri, Strasbourg

*Transcendental Liouville inequality and rational points on disks* - April 12, 2019 == Peter Feller, ETH

*Moebius bands in B*^{3}xS^{1}and the square peg problem - March 29, 2019 == Eric Bahuaud, Seattle University

*Ricci flow of asymptotically hyperbolic metrics* - March 22, 2019 == Liangming Shen, CIRGET

*The Kahler-Ricci flow with log canonical singularities* - March 15, 2019 == Brent Pym, McGill

*Multiple zeta values in deformation quantization* - February 22, 2019 == Jonah Gaster, McGill

*Computing discrete harmonic maps between hyperbolic surfaces* - February 15, 2019, 10:00 == Brett Kotschwar, Arizona State University

*The determination of a shrinking Ricci soliton from its geometry at infinity* - February 15, 2019 == Éveline Legendre, Toulouse

*L’invariant de Futaki et la fonctionnelle d’Einstein-Hilbert* - Wednesday, February 6, 2019, 11h00 == Kiumars Kaveh, University of Pittsburgh

*Convexity in algebraic geometry and symplectic geometry* - January 25, 2019 == Cyril Lecuire, Toulouse

*Représentations kleiniennes* - January 18, 2019 == Duncan McCoy, UT Austin

*Dehn surgery on knots in S*^{3} - Wednesday, January 16, 2019, 11:00 == Julien Keller, Marseille

*Quantification géométrique et applications à différents problèmes de géométrie complexe* - January 11, 2019 == Baptiste Chantraine, Nantes

*Sous-variétés lagrangiennes des variétés de Weinstein* - January 11, 2019, 10:00 == Christine Guenther, Pacific University

*Convergence Stability of the Ricci Flow* - December 14, 2018 == Frédéric Campana, Université de Lorraine, Nancy

*Criterion for algebraicity of foliations, applications* - December 7, 2018 == Eric Woolgar, University of Alberta

*Conditions of curvature-dimension type in relativity and Lorentzian geometry* - December 7, 2018, 10:00 == Marcin Sabok, McGill University

*Circle squaring and actions of Z*^{n} - November 30, 2018 == Charles Doran, University of Alberta

*Classification and Applications of K3 Surface Fibered Calabi-Yau Threefolds* - November 16, 2018 == Joey van der leer Duran, University of Toronto

*Hodge decompositions for Lie algebroids on manifolds with boundary* - November 9, 2018 == Daniel Alvarez-Gavela, IAS Princeton,
*The multi-parametric Reidemeister theorem and higher homotopy*

groups of the space of Legendrian knots in the standard contact 3-space - November 2, 2018 == Curtis Porter, North Carolina State

*Nondegeneracy in CR Geometry* - October 12, 2018 == Georges Dloussky, Université Aix-Marseille

*How to prove the GSS conjecture?* - October 5, 2018 == Dmitry Faifman, Université de Montréal

*Lipschitz-Killing curvatures in pseudo-Riemannian and contact manifolds* - September 28, 2018 == Jeffrey Streets, University of California, Irvine

*Pluriclosed flow and geometrization of complex surfaces* - September 27, 2018 == Casey Lynn Kelleher, Princeton

*Symplectic curvature flow revisited*

## Geometric Group Theory Seminar

- March 25, 2020 == Sami Douba, McGill
*Finitely generated subgroups of compact Lie groups* - March 18, 2020 == Merlione Incerti-Medici, Zurich
*Topologies and metrics on the Morse boundary* - March 11, 2020 == Ilya Kapovich, Hunter College of CUNY
*Singularity properties of random free group automorphisms and of random trees in the boundary of Outer space* - February 19, 2020 == James Farre, Yale University
*Hyperbolic volume and bounded cohomology* - February 12, 2020 == Michał Marcinkowski, IMPAN
*Bounded cohomology of transformation groups* - February 5, 2020 == Tyrone Ghaswala, Université du Québec à Montréal
*Promoting circular-orderability to left-orderability* - January 29, 2020 == Rylee Lyman, Tufts University
*Train Tracks, Orbigraphs and CAT(0) Free-by-cyclic groups* - January 22, 2020 == Damian Osajda, University of Wrocław
*Helly groups* - January 15, 2020 == Dani Wise, McGill
*Intro to word-hyperbolic groups* - January 8, 2020 == Abdalrazzaq Zalloum, Queen’s University
*Growth of stable subgroups in Morse-local-to-global groups* - November 20, 2019 == Dani Wise, McGill University
*A vanishing result for the second L*^{2}-Betti number. - November 13, 2019 == Elizabeth Fields, University of Illinois at Urbana-Champaign
*Trees, dendrites, and the Cannon-Thurston map* - November 6, 2019 == Jens Harlander, Boise State University
*Geometry and topology of labeled oriented trees.* - October 30, 2019 == Nima Hoda, École normale supérieure
*Crystallographic Helly Groups* - October 23, 2019 == Kasia Jankiewicz, University of Chicago
*Residual finiteness of three generator Artin groups* - October 16, 2019 == Heejoung Kim, University of Illinois at Urbana-Champaign
*Algorithms detecting stability and Morseness for finitely generated groups* - October 9, 2019 == Rémi Coulon, Institut de recherche mathématique de Rennes
*Twisted Patterson-Sullivan measure and applications to growth problems* - October 2, 2019 == Catherine Pfaff, Queen’s University
*Typical trees: an Out(F*_{r}) excursion - September 25, 2019 == Piotr Przytycki, McGill University
*Tits alternative in dimension 2* - September 18, 2019 == Michael Brandenbursky, Ben-Gurion University
*Entropy, metrics and quasi-morphisms* - September 11, 2019 == Daniel Woodhouse, University of Oxford
*Action rigidity of free products of hyperbolic manifold groups* - April 10, 2019 == Leonid Potyagailo, Université de Lille

*Martin and Floyd boundaries of finitely generated groups* - April 3, 2019 == Joshua Greene, Boston College

*On loops intersecting at most once* - March 27, 2019 == Steven Boyer, UQAM

*Deforming foliations in branched covers and the L-space conjecture* - 20 mars 2019 == Alexandre Martin, Heriot-Watt University

*The Tits alternative for two-dimensional Artin groups* - March 13, 2019 == Piotr Przytycki, McGill University

*Torsion groups do not act on 2-dimensional CAT(0) complexes* - March 6, 2019 == Doron Puder, Tel Aviv University

*Matrix integrals, graphs on surfaces, and mapping class group* - February 27, 2019 == Sami Douba, McGill University

*2-Systems of arcs on spheres with prescribed endpoints* - February 20, 2019 == Hugh Thomas, UQAM

*Parking functions via piecewise-linear transformations of R*^{m} - February 6, 2019 == Zachary Munro, McGill

*Weak Modularity and Euclidean Buildings* - January 30, 2019 == Dani Wise, McGill

*Bicollapsibility and groups with torsion* - January 23, 2019 == Michael Lipnowski, McGill

*Geometry of the smallest 1-form Laplacian eigenvalue on hyperbolic manifolds* - January 16, 2019 == Nima Hoda, McGill

*Constructing bisimplices* - January 9, 2019 == Jonah Gaster, McGill

*Computing discrete harmonic maps between hyperbolic surfaces* - December 12, 2018 == Jacek Świątkowski, University of Wrocław)

*Topological characterization of boundaries of free products of groups* - Thursday, December 6, 2018, room 920 == Jingyin Huang, Ohio State University

*Quasi-isometric rigidity of 2-dimensional Artin groups* - November 28, 2018 == Matthew Haulmark, Vanderbilt University

*Non-hyperbolic groups with Menger curve boundary* - November 21, 2018 == Tomasz Prytuła, Max Planck Institute

*Classifying space for proper actions for groups admitting a strict fundamental domain* - November 14, 2018 == Valentina Disarlo, Heidelberg University
*Cubical geometry in the polygonalization complex* - November 7, 2018 == Timothée Marquis, Université Catholique de Louvain
*On geodesic ray bundles in buildings* - October 31, 2018 == Ilya Gekhtman, University of Toronto
*Growth rates of invariant random subgroups in negative curvature* - October 24, 2018 == Marcin Sabok, McGill University
*The Hrushovski property for hypertournaments and profinite topologies* - October 17, 2018 == Camille Horbez, Université Paris-Sud
*Growth under automorphisms of hyperbolic groups* - October 10, 2018 == Macarena Covadonga Robles Arenas, McGill University
*Measuring complexity of curves on surfaces* - October 4, 2018, 16:00 == Ruth Charney, Brandeis University
*A geometric approach to Artin groups* - October 3, 2018 == Daniel Woodhouse, Technion
*Revisiting Leighton’s graph covering theorem* - September 26, 2018 == Giulio Tiozzo, University of Toronto
*Random walks and WPD actions* - September 19, 2018 == Florestan Brunck, McGill University
*Non-Obtuse Dissection of Tetrahedra* - September 12, 2018 == Yann Pequignot, McGill University
*An introduction to Borel chromatic numbers* - September 5, 2018 == Damian Osajda, University of Wrocław
*Two-dimensional Artin groups and metric systolicity*

## Symplectic Seminar

- July 24, 2020 == John Pardon, Princeton
*Pontryagin--Thom for orbifold bordism* - July 17, 2020 == Yusuke Kawamoto (Paris); Shira Tanny (Tel Aviv); Javier Martínez-Aguinaga (Madrid)
*Homogeneous quasimorphism, C*^{0}-topology and Lagrangian intersection; Floer theory of disjointly

supported Hamiltonians; Formal Legendrian and horizontal embeddings - July 10, 2020 == Peter Ozsvath, Princeton
*Knot Floer homology and bordered algebras* - July 3, 2020 == Tara Holm (Cornell)/Ana Rita Pires(Edinburgh)
*Infinite staircases and reflexive polygons (Part of Ellipsoid day joint with*

Western Hemisphere Virtual Symplectic Seminar) - June 26 2020 == Ailsa Keating, Cambridge
*Distinguishing monotone Lagrangians via holomorphic annuli* - June 19 2020 == Igor Uljarevic, Belgrade
*Exotic symplectomorphisms and contact circle action* - June 12 2020 == Mark Mclean, SUNY, Stony Brook
*Floer Cohomology and Arc Spaces* - June 5 2020 == Three short research talks
*See https://dms.umontreal.ca/~cornea/Seminar.html* - May 29 2020 == Alex Oancea, Orsay, Paris
*Duality for Rabinowitz-Floer homology* - May 22, 2020 == Denis Auroux, Harvard
*Mirrors of curves and their Fukaya categories* - May 15, 2020 == Jo Nelson, Rice
*Reflections on Cylindrical Contact Homology* - May 8, 2020 == Marco Mazzucchelli, ENS-Lyon
*Spectral characterizations of Besse and Zoll Reeb flows* - May 1, 2020 == Alberto Abbondandolo, Bochum
*Zoll contact forms are local maximisers of the systolic ratio* - April 24, 2020 == Lisa Traynor, Bryn Mawr
*The Geography of Immersed Lagrangian Fillings of Legendrian Submanifolds* - April 17, 2020 == Nicholas Wilkins, Bristol
*Equivariant quantum operations and relations between them* - April 10, 2020 == Leonid Polterovich, Tel Aviv
*Geometry of Quantum Uncertainty* - April 3, 2020 == Daniel Cristofaro-Gardiner, IAS
*The simplicity conjecture* - March 27, 2020 == Octav Cornea, Montreal
*Fragmentation pseudo-metrics and Lagrangian submanifolds* - March 13, 2020 == Umut Varolgunes, Stanford
*Super-rigidity of skeleta associated to complements of symplectic divisors* - February 28, 2020 == Egor Shelukhin, UdeM
*Smith theory in Floer homology, persistence, and dynamics* - February 21, 2020 == Egor Shelukhin, UdeM
*Smith theory in filtered Floer homology* - February 14, 2020 == Octav Cornea, UdeM
*Marked Lagrangian submanifolds and Fukaya categories* - February 7, 2020 == Jean-Philippe Chassé, UdeM
*The topology of Lagrangian submanifolds calibrated by curvature* - January 31, 2020 == Dustin Connery-Grigg, UdeM
*A Geometric Realization of the Hamiltonian Floer Complex for Surfaces* - January 24, 2020 == Jun Zhang, CRM-UdeM
*Relative growth rate and contact Banach-Mazur distance* - January 17, 2020 == Fabian Ziltener, Utrecht University

*Coisotropic submanifolds of symplectic manifolds, leafwise fixed points, and spherical nonsqueezing* - November 8, 2019 == Richard Hind, Notre Dame

*Packing and squeezing Lagrangian tori* - November 1, 2019 == Kenji Fukaya, Kyoto University

*Lagrangian Floer theory in the divisor complement* - October 18, 2019 == Jun Zhang, CRM

*Shape invariant and coarse Banach-Mazur distance* - October 11, 2019, 1:15 == Dmitry Faifman, CRM

*Holmes-Thompson intrinsic volumes and Finsler manifolds* - October 4, 2019 == Xiudi Tang, Toronto

*Symplectic ray removal and its applications* - September 26, 2019 == Pierre-Alexandre Mailhot, Université de Montréal

*The Calabi homomorphism and Lagrangian cobordisms* - September 20, 2019 == Michael Usher, UGA

*Local rigidity and C*^{0}symplectic and contact topology - April 12, 2019 == Egor Shelukhin, Université de Montréal

*Viterbo conjecture revisited* - April 5, 2019 == Emmanuel Giroux, UMI CNRS-CRM

*From Morse functions to symplectic Lefschetz fibrations on cotangent bundles* - March 29, 2019 == Jeff Hicks, Berkeley

*Wall Crossing and Lagrangian Cobordisms* - March 22, 2019 == Baptiste Chantraine, Nantes and UMI-CNRS

*Lagrangian cobordisms between Legendrian submanifolds and Lagrangian surgeries (continued)* - March 15, 2019 == Nicholas Wilkins, Oxford/MIT

*Quantum and Floer Steenrod squares* - March 1, 2019 == Baptiste Chantraine, Nantes and UMI-CNRS

*Lagrangian cobordisms between Legendrian submanifolds and Lagrangian surgeries* - February 15, 2019 == Brent Pym, McGill

*Holonomic Poisson manifolds* - February 8, 2019 == Basak Gurel, U Central Florida, Orlando

*Dynamics of Hamiltonian pseudo-rotations* - February 1, 2019, 14:40 == Gael Meigniez, U de Bretagne-Sud

*A proof of the Mather-Thurston theorem* - February 1, 2019 == Alexandre Perrier, Université de Montréal

*Lagrangian cobordism groups of surfaces of genus higher than one* - January 25, 2019 == Egor Shelukhin, Université de Montréal

*Viterbo conjecture for Zoll symmetric spaces* - December 7, 2018 == Alexandre Perrier, Université de Montréal

*Lagrangian cobordism groups of surfaces of genus higher than one* - November 30, 2018 == Egor Shelukhin, Université de Montréal

*Viterbo conjecture for Zoll symmetric spaces* - November 16, 2018 == Amiel Peiffer-Smadja, Nantes

*Functoriality of the Open-Closed map* - November 9, 2018 == Caitlin Leverson, Georgia Institute of Technology
- October 26, 2018 == Baptiste Chantraine, Nantes et UMI CNRS - CRM

*Categories associated to Legendrian links II* - October 12, 2018, 14:35 == Jeremy Lane, University of Geneva

*Gelfand-Zeitlin, Ginzburg-Weinstein, and partial tropicalization* - October 12, 2018, 13:30 == Dan Rutherford, Ball State University

*Immersed Lagrangian cobordisms and augmentations* - September 28, 2018 == Michael Sullivan, UMASS Amherst and CRM

*Cellular contact homology, augmentations and generating families for Legendrian surfaces* - September 21, 2018 == Baptiste Chantraine, Nantes et UMI CNRS - CRM

*Categories associated to Legendrian links*

## Working Groups 2018-19

- Tuesdays

10:00 - 12:00 ==*Working Group in low-dimensional topology*

PK-5675, UQAM.**Organizers**: Steven Boyer and Biji Wong - Mondays

1:30 - 3:30 ==*Kähler Geometry Working Group*

PK-5675, UQAM.**Organizer**: Lars Sektnan