CUNY Geometry and Topology SeminarPast semesters
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Click on the title of a talk for the abstract (if available).
Link to current semester.
Past Semesters:
| September 11, 2008 | Jason Behrstock (Lehman College, CUNY) | Asymptotic geometry of infinite groups, an introduction |
| Wednesday, September 17 Note special day |
Dragomir Saric (Queens College, CUNY) | The mapping class group cannot be realized by homeomorphisms |
| September 25 | Abhijit Champanerkar (Staten Island College, CUNY) | Around the A-polynomial |
| October 2 | Adam Knapp (Columbia University) | Monopoles and Montesinos Twins |
| October 9 | No seminar today | |
| October 16 | No seminar today | |
| October 23 | No seminar today | |
| October 30 | Tullia Dymarz (Yale University) | Large scale geometry of certain solvable Lie groups |
| November 6 | Natasa Macura (Trininty University and Brandeis University) | CAT(0) spaces with polynomial divergence of geodesics |
| November 13 | No seminar today | |
| November 20 | Danny Calegari (California Institute of Technology) | Combable functions, quasimorphisms, and the central limit theorem |
| November 27 |
No seminar today | |
| December 4 |
Joan Birman (Columbia University) | Heegaard splittings and the CGO invariant of a 3-manifold |
| December 11 | Adam Lowrance (Louisiana State University) | The Khovanov width of closed 3-braids |
| February 5, 2009 | Michael Handel (Lehman College, CUNY) | Subgroups of Out(Fn) |
| February 12 | No seminar today | |
| February 19 | Igor Rivin (Temple University) | Curves and coverings of surfaces |
| February 26 | Melvyn Nathanson (Lehman College, CUNY) | Two problems in number theory related to geometric group theory |
| March 5 | Christina Sormani (Lehman College, CUNY) | Covering Spectra of Riemannian manifolds and Metric spaces |
| March 12 | Denis Osin (Vanderbilt University) | Dehn surgery in groups acting on hyperbolic spaces |
| March 19 | David Futer (Temple University) | The geometry of unknotting tunnels |
| March 26 | Yael Algom-Kfir (University of Utah) | Negative Curvature Phenomena in Outer Space |
| April 2 | Dylan Thurston (Barnard College, Columbia University) | Computing with curves on surfaces |
| April 9 | No seminar today | |
| April 16 | No seminar today | |
| April 23 | Josh Greene (Princeton University) | Quasi-alternating links and lens space surgeries |
| April 30 | Xiaobo Liu (Columbia University) | Kashaev coordinates on Teichmuller space |
| May 7 | David Fisher (Indiana University and Radcliffe Institute for Advanced Studies, Harvard) | Rigidity of Anosov Zd actions |
| May 14 | Philip Ording (Medgar Evers College, CUNY) | Constructing Heegaard knot diagrams for (1,1) knots |
| September 10, 2009 | Lee Mosher (Rutgers, Newark) | Subgroup classification in Out(Fn) |
| September 17 | Joseph Maher (CUNY Staten Island) | Asymptotics for pseudo-Anosovs in the Teichmuller lattice |
| September 24 | No seminar today | |
| October 1 | No regular seminar today | Go to: Finitely Presented Groups: Where do we go from here at City College |
| October 2 | Day two of the conference at City College | |
| October 8 | Jason Manning (SUNY Buffalo) | Virtually geometric words and Whitehead's algorithm |
| October 15 | Ara Basmajian (CUNY Hunter) | Crossing number of closed geodesics and their lengths |
| October 22 | Cynthia Curtis (The College of New Jersey) | The Jones polynomial and boundary slopes of alternating knots |
| October 29 | Roland van der Veen (KdV Institute, University of Amsterdam) | Quantum Schur-Weyl duality and twisted torus knots |
| November 5 Double Header 4pm and 5pm |
Jeremy Kahn (SUNY Stony Brook) | Essential Immersed Surfaces in Closed Hyperbolic 3-Manifolds |
| Chloe Perin (Hebrew University) | Definable subsets and cyclic subgroups of the free group | |
| November 12 | Alexander Shumakovitch (George Washington University) | Homologically Z_2-thin knots have no 4-torsion in Khovanov homology |
| November 19 | Rob Schneiderman (CUNY Lehman) | Geometric filtrations of link concordance |
| November 26 |
No seminar today | |
| December 3 |
Matt Clay (Allegheny College) | Current twisting and nonsingular matrices |
| February 11, 2010 | Peter Brinkmann (CCNY) | Characteristic polynomials of pseudo-Anosov maps |
| February 18 | No seminar today | CUNY Classes follow Monday Schedule |
| February 25 | Cancelled -- No seminar today | |
| March 4 | Sergio Fenley (Princeton/Florida State University) | Quasigeodesic pseudo-Anosov flows |
| March 11 | No seminar today | |
| March 18 | Ken Shackleton (IPMU/University of Tokyo) | On the coarse geometry of Teichmueller space |
| March 25 | No seminar today | |
| April 1 | No seminar today | Spring Break |
| Tuesday, April 6 Note special day Room: 3209 |
Vadim Kaimanovich (University of Ottawa) | Hopf decomposition and horospheric limit sets |
| April 8 | Diane Vavrichek (SUNY Binghamton) | Quasi-isometry invariant subgroups |
| April 15 | Feng Luo (Rutgers University) | Normal surfaces and Thurston's equation on triangulated 3-manifolds |
| April 22 | No seminar today | Scheduled talk has been postponed until May |
| April 29 | Peter Horn (Columbia University) | Higher-order signature cocycles for subgroups of the mapping class group |
| May 6 |
Cancelled -- No seminar today. Don't miss Denis Osin's talk in the Group Theory seminar on Friday! |
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| May 13 Double Header 3:30pm and 4:30pm |
Sean Cleary (CCNY) | Infinite periodic tree diagrams and Thompson's group F |
| Kei Nakamura (Temple University) | Girth-Alternative for Mapping Class Groups |
| August 31, 2010 | Ilesanmi Adeboye (UCSB) | On Volumes of Hyperbolic Orbifolds |
| September 7 | Pat Hooper (CCNY, CUNY) | The invariant measures of some infinite interval exchange maps |
| September 14 | No seminar today | CUNY Classes follow Friday Schedule |
| September 21 | Thomas Kerler (Ohio State University) | The Lawrence-Krammer-Bigelow Representations of the Braid Groups via Quantum-SL2 |
| September 28 | Will Cavendish (Princeton) | On the Growth of the Weil-Petersson Diameter of Moduli Space |
| October 5 | Adam Sikora (SUNY Buffalo & Columbia) | Character Varieties and their quantization |
| October 12 | Joseph Maher (CUNY Staten Island) | Growth rates for stable commutator length |
| October 19 | Chris Atkinson (Temple University) | Two-sided combinatorial volume bounds for non-obtuse hyperbolic polyhedra |
| October 26 | Vaibhav Gadre (Harvard) | Harmonic measure for the mapping class group |
| November 2 | No seminar today | Election day |
| November 9
Double Header 4pm and 5pm |
David Futer (Temple University) | Surface quotients of hyperbolic buildings |
| Julien Marcher (Paris) | Topological Quantum Field Theory: Curve Operators and Toeplitz Operators | |
| November 16 | Bill Breslin (University of Michigan) | Short geodesics and Heegaard surfaces in hyperbolic 3-manifolds |
| November 23 |
No seminar today | |
| November 30 | Julien Roger (Rutgers) | Quantum Teichmuller theory and conformal field theory |
| December 7 |
Keiko Kawamuro (University of Iowa) | The self linking number and planar open books |
| February 8, 2011 | Moshe Cohen (Bar-Ilan University) | A dimer model for the Jones polynomial of pretzel knots |
| February 15 | John Pardon (Princeton) | Gromov's knot distortion | February 22 | Robert Lipshitz (Columbia) | A faithful linear-categorical action of the mapping class group |
| March 1 | Ian Biringer (Yale) | Geometric consequences of algebraic rank in hyperbolic 3-manifolds |
| March 8 | Ryan Blair (U Penn) | Width is Not Additive | March 15 | Catherine Pfaff (Rutgers) | Constructing and Classifying Fully Irreducible Outer Automorphisms of Free Groups | March 22 | Genevieve Walsh (Tufts) | Coxeter Groups and Teichmuller space | March 29 | Ingrid Irmer (Universitat Bonn) | Distances in the homology curve complex |
| April 5 | Joshua Bowman (SUNY Stony Brook) | Wild singularities of translation surfaces |
| April 12 | Subhojoy Gupta (Yale) | Asymptoticity of grafting and Teichmuller rays |
| April 19 | No seminar today | Spring Break |
| April 26 | No seminar today | Spring Break |
| May 3 | Zeno Huang (CUNY Staten Island) | Results on normal flows in quasi-Fuchsian manifolds |
| May 10 | Mike Shub (CONICET, IMAS, Universidad de Buenos Aires and CUNY Graduate School) | Entropy, Homology and the Fundamental Group |
| February 7, 2012 | Tian Yang (Rutgers) | The Skein Algebra and the Decorated Teichmuller Space |
| February 14 | Craig Hodgson (Melbourne University, visiting Boston College) | On the number of hyperbolic 3-manifolds with a given volume |
| February 21 | No seminar today | CUNY Classes follow Monday Schedule |
| February 28 | Shawn Rafalski (Fairfield) | The smallest Haken hyperbolic polyhedra |
| March 6 Double Header Special time/room: 2pm and 3pm Room 6494 |
Jean Sun (Yale) | Growth, projections and bounded generation of mapping class groups |
| Slava Krushkal (Virginia) | Slicing the Hopf link | |
| March 13 | Mark Hagen (McGill) | Simplices at infinity for CAT(0) cube complexes |
| March 20 | Lee Mosher (Rutgers) | Hyperbolicity of the free splitting complex of F_n |
| March 27 | David Shea Vela-Vick (Columbia) | The equivalence of transverse link invariants in knot Floer homology |
| April 3 | Postponed until next semester -- No seminar today. | April 10 | No seminar today | Spring Break |
| April 17 | Andrew Manion (Princeton) | Totally twisted Khovanov homology |
| April 24 | Adam Knapp (Columbia) | Diffeomorphisms of 4-manifolds |
| May 1 | Howard Masur (University of Chicago) | Winning sets of Diophantine measured foliations |
| May 8 | Johanna Mangahas Kutluhan (Brown) | Some Schottky subgroups of mapping class groups |
| September 11, 2012 | Thomas Koberda (Yale) | The curve complex for a right-angled Artin group |
| September 18 | No seminar today | CUNY holiday |
| September 25 | No seminar today | CUNY holiday |
| October 2 Double Header 3pm (Room 4214-03) and 4:15pm (Room 3212) |
Moira Chas (SUNY Stony Brook) | The Goldman bracket determines intersection numbers for surfaces and orbifolds |
| String topology and the geometric decomposition of three manifolds | ||
| October 9 | Hao Liang (University of Illinois, Chicago) | Equations over central extensions of hyperbolic groups |
| October 16 | Giulio Tiozzo (Harvard) | Geodesic ray tracking for random walks on groups |
| October 23 | Mark Sapir (Vanderbilt) | Aspherical manifolds with extreme properties |
| October 30 | Adam Lowrance (Vassar) | Khovanov homology and oriented ribbon graphs |
| November 6 | Christian Millichap (Temple) | How many hyperbolic 3-manifolds can have the same volume |
| November 13 | Joshua Sussan (Medgar Evers College CUNY) | Colored tangle invariants and sl(2) categorification |
| November 20 | No seminar today | |
| November 27 | Julien Rogers (Rutgers) | Ptolemy groupoids, shear coordinates and the augmented Teichmuller space |
| December 4 | Alexander Gamburd (CUNY Graduate Center) | |
| December 11 | Anastasiia Tsvietkova (LSU) | Hyperbolic structures from link diagrams |
| September 17, 2013 | David Fisher (University of Indiana) | Hodge theory for group cohomology and local rigidity |
| September 24 | Adam Lowrance (Vassar) | Measuring a knot's distance from alternating |
| October 1 | Mehmet Haluk Sengun (University of Warwick / ICERM) | Torsion homology of Bianchi Groups and Arithmetic manifolds |
| October 8 | Mahan Mj (RKM Vivekananda University) | Homotopical Height |
| October 15 | No seminar today | |
| October 22
Meeting in: Room C205 |
Wolfgang Lueck (Hausdorff Research Institute for Mathematics and Rheinische Friedrich-Wilhelms-Universitae) | Hyperbolic groups with spheres as boundary |
| October 29 | Brian Rushton (Temple) | Quasi-isometry properties of subdivision rules |
| November 5 | Sang-hyun Kim (KAIST) | Embeddability between right-angled Artin groups |
| November 12 | Sara Maloni (Brown) | Combinatorial methods on actions on character varieties |
| November 19 | Liam Watson (UCLA) | Khovanov homology and the symmetry group of a knot |
| November 26 | No seminar today | |
| December 3 | Hyungryul Baik (Cornell) | Laminations on the Circle and Cannon's Conjecture |
| December 10 | Alessandro Sisto (ETH) | Boundaries of relatively hyperbolic groups |
| February 11 | Assaf Hadari (Yale) | Homological shadows |
| February 18 | Genevieve Walsh (Tufts) | The Big Dehn Surgery graph |
| February 25 | Hongbin Sun (Princeton) | Virtual domination of 3-manifolds |
| March 4 | Lizhen Ji (Michigan) | Spines of symmetric spaces and Teichmueller spaces |
| March 11 | Ken Bromberg (Utah) | Train tracks, distance in the curve complex and the capacity dimension of the space of ending laminations |
| March 18 | No Seminar this week | |
| March 25 | Joseph Maher (CUNY) | The Casson invariant for random Heegaard splittings |
| April 1 | Jingyin Huang (NYU) | Quasi-isometry classification of right-angled Artin group with finite outer automorphism group |
| April 8 | Bogwang Jeon (Columbia) | Hyperbolic 3-manifolds of bounded volume and trace field degree |
| April 15 | No seminar today | Spring Break |
| April 22 | No seminar today | Spring Break |
| April 29 | Karin Melnick (Maryland) | Flows on 1-graded parabolic geometries |
| May 6 | Alexei Miasnikov (Stevens Institute of Technology) | On the Andrew-Curtis Conjecture |
| May 13 | Walter Neumann (Columbia) | Intercusp distance in hyperbolic manifolds |
| September 9, 2014 | Abhijit Champanerkar (CUNY) | Geometrically and diagrammatically maximal knots |
| September 16 | Matt Stover (Temple) | Amalgam Anosov representations |
| September 23 | No seminar today | |
| September 30 | Justin Malestein (Hebrew University) | Arithmetic quotients of the mapping class group |
| October 7 | Ara Basmajian (CUNY) | Arcs, orthogeodesics, and hyperbolic surface identities |
| October 14 | Brittany Terese Fasy (Tulane) | Providing Statistical Guarantees for Topological Summaries of Data |
| October 21 | Athanase Papadopoulos (Universite de Strasbourg) | Actions of mapping class groups |
| October 28 | Robert Young (NYU) | Filling multiples of embedded curves |
| November 4 | No Seminar | Dan Ketover (Princeton University) will speak in the Diff Geo seminar at 2:45pm |
| November 11 | Yong Hou | Hausdorff spectrum of Riemann surfaces |
| November 18 | Emily Stark (Tufts) |
| February 3, 2015 | Robert Schneiderman (CUNY) | Pulling apart 2-spheres in 4-manifolds |
| February 10 | Ian Biringer (Boston College) | Invariant measures on the space of all Riemannian manifolds |
| February 17 | No seminar today | |
| February 24 | Steven Frankel (Yale) | Coarse geometry and closing lemmas |
| March 3 | Hugo Parlier (University of Fribourg) | Flipping triangles on surfaces |
| March 10 | Jason Behrstock (CUNY and Barnard College, Columbia) | Coxeter groups, divergence, and random graphs |
| March 17 | Feng Luo (Rutgers) | A TQFT of Turaev-Viro type on shaped 3-dimensional triangulations |
| March 24 | Dave Futer (Temple) | Geometrically similar knots |
| March 31 | Sam Taylor (Yale) | Stability in mapping class groups and right-angled Artin groups |
| April 7 | No seminar today | Spring Break |
| April 14 | Curtis Kent (NYU) | A Cartan-Hadamard type theorem for relatively hyperbolic groups |
| April 21 | Martin Bridgeman, Feng Luo, Ser Peow Tan, and Greg McShane | Workshop on Identities April 21 and 22 |
| April 28 | Vincent Alberge (Universite de Strasbourg) | Convergence of some horocyclic deformations in the Gardiner-Masur boundary |
| May 5 | Elisabeth Fink (ENS, Paris, France) | Morse geodesics in lacunary hyperbolic groups |
| September 29, 2015 | Daniel Kasprowsky (Max Planck Institute) | Stable classification of 4-manifolds with 3-manifold fundamental groups |
| October 6 | Christopher Cashen (University of Vienna) | Boundary Homeomorphisms and Quasi-isometries Between Hyperbolic Groups with Two-Ended Splittings |
| October 13 | Enrique Pujals (IMPA and CUNY) | The C^r-stability conjecture |
| October 20 | Alex Eskin (University of Chicago) | Coarse differentiation and quasi-isometric rigidity of Teichmuller space |
| October 27 | No seminar | |
| November 3 | Balazs Strenner (Princeton) | Construction of pseudo-Anosov maps and a conjecture of Penner |
| November 10 | Jessica Purcell (BYU) | Knot diagrams and twisted plats |
| November 17 | Daryl Cooper (UCSB) | Finite-volume hyperbolic 3-manifolds contain immersed quasi-Fuchsian surfaces |
| November 24 | Lewis Bowen (Texas) | Cheeger constants and L^2 Betti numbers |
| December 1 | Nathan Dunfield (UIUC) | A tale of two norms |
| February 2, 2016 | Carolyn Abbott (Wisconsin) | Not all acylindrically hyperbolic groups have universal acylindrical actions | |
| February 9, 2016 | No seminar today | CUNY on Friday schedule today | |
| February 16, 2016 | Ken Bromberg (Utah) | Stable commutator length in the mapping class group | |
| February 23, 2016 | No seminar today | ||
| March 1, 2016 | Matthew Cordes (Brandeis) | The metric Morse boundary | |
| March 8, 2016 | John Etnyre (Georgia Tech) | Satellite operations and Legendrian knot theory | |
| March 15, 2016 | Ash Lightfoot (Indiana) | Link Maps in the 4-sphere | |
| March 22, 2016 | Joe Quinn (CUNY) | Quaternion algebras and hyperbolic 3-manifolds | |
| March 29, 2016 | No seminar today | Thin Groups at IAS | |
| April 5, 2016 | No seminar today | ||
| April 12, 2016 | Joel Hass (Davis and IAS) | Metrics on the Space of Shapes, and Applications to Biology | |
| April 19, 2016 | Abigail Thompson (Davis and IAS) | Incompressible surfaces and Heegaard splittings of 3-manifolds | |
| April 26, 2016 | No seminar today | Spring break | |
| May 3, 2016 | Tarik Aougab (Brown) | Characterizing stable subgroups | |
| May 10, 2016 | Giulio Tiozzo (Yale) | Counting loxodromics for hyperbolic actions |
| September 20, 2016 | Jason Behrstock (CUNY) | Asymptotic dimension of mapping class groups |
| September 27, 2016 | Adam Lowrance (Vassar) | Chromatic homology, Khovanov homology, and torsion |
| October 4, 2016 | No seminar today (no CUNY classes) | |
| October 11, 2016 | No seminar today (no CUNY classes) | |
| October 18, 2016 | Mark Bell (UIUC) | Finding geodesics in the curve graph |
| October 25, 2016 | Ivan Levcovitz (CUNY) | Divergence of CAT(0) Cube Complexes and Right-Angled Coxeter Groups |
| November 1, 2016 | Mikael Vejdemo-Johansson (CUNY) | Topology in the furnace: process diagnostics using the Nerve lemma |
| November 8, 2016 | David Rosenthal (St. Johns) | Regular Finite Decomposition Complexity |
| November 15, 2016 | Linus Kramer (Muenster & Columbia) | Buildings and some of their uses in geometry |
| November 22, 2016 | Josh Howie (Monash) | Weakly Generalised Alternating Knots |
| November 29, 2016 | Seungwon Kim (CUNY) | A topological characterization of toroidally alternating knots |
| December 6, 2016 | Anastasiia Tsvietkova (Rutgers) | Isotopy classes of crossing arcs in hyperbolic alternating links |
| February 7, 2017 | Trang Nguyen (NYU) | Quasi-isometric embedding of symmetric spaces and buildings |
| February 14, 2017 | No seminar today (CUNY Colloquium) | |
| February 21, 2017 | BoGwang Jeon (Columbia) | The Pink-Zilber Conjecture and the Generalized Cosmetic Surgery Conjecture |
| February 28, 2017 | Igor Nikolaev (St Johns University) | Linearity and mapping class groups |
| March 7, 2017 | Ilya Gekhtman (Yale) | Word length asymptotics for actions of some automatic (e.g. relatively hyperbolic) groups via stationary measures for Markov processes |
| March 14, 2017 | Imma Snowden (Arctic U) | Keeping the kids busy when the Mayor cancels school, but there is not enough snow to sled |
| March 21, 2017 | Ilya Kapovich (UIUC & CUNY) | Cannon-Thurston maps for hyperbolic free group extensions |
| March 28, 2017 | Walter Neumann (Barnard) | Coarse geometry and singularities |
| April 4, 2017 | William Worden (Temple) | Experimental statistics of Veering Triangulations |
| April 11, 2017 | No seminar today (Spring Break) | |
| April 18, 2017 | No seminar today (Spring Break) | |
| April 25, 2017 | Nick Vlamis (Michigan) (joint with Hyperbolic geometry seminar) | Algebraic and topological properties of big mapping class groups |
| May 2, 2017
Double Header 3pm and 4pm (location TBA) |
Rochy Flint (CUNY GC) | Intercusp Geodesics and Cusp Shapes of Fully Augmented Links |
| Carolyn Abbott (Wisconsin) | Extending acylindrical actions | |
| May 9, 2017 | Dan Silver (South Alabama) | Graph Complexity and Mahler Measure |
| May 16, 2017 | Mark Hughes (BYU) | |
| May 23, 2017 | Rama Mishra (IISER, India) | Real rational knots |
| January 30, 2018 | Hugo Parlier (Luxembourg) | Families of identities on hyperbolic surfaces |
| February 6, 2018 | No seminar today | |
| February 13, 2018 | Alexander Zupan (Nebraska) | Weak Property 2R and Generalized Square Knots |
| February 20, 2018 | No seminar today | CUNY on Monday Schedule |
| February 27, 2018 | Roman Sauer (Karlsruhe Institute of Technology) | Lattice envelopes |
| March 6, 2018 | Thang Nguyen (NYU) | Quasi-isometric rigidity of warped cones and expanders. |
| March 13, 2018 | No seminar today | Faculty Meeting and Colloquium |
| March 20, 2018 Jt with Hyp Geom Seminar Time: 3pm Room: 4214.03 |
Irene Pasquinelli (Durham) | Deligne-Mostow lattices and cone metrics on the sphere |
| March 27, 2018 | Joe Quinn (UANM, Mexico) | Möbius transformations and hyperbolic space in arbitrary dimensions |
| April 3, 2018 | No seminar today | Spring Break |
| April 10, 2018 | Emily Stark (Technion) | The visual boundary of hyperbolic free-by-cyclic groups |
| April 17, 2018 | Chenxi Wu (Rutgers) | An upper bound on the asymptotic translation length on the curve complex |
| April 24, 2018 | Ivan Levcovitz (CUNY) | Coarse geometry of right-angled Coxeter groups |
| May 1, 2018 | Jingyin Huang (Bonn) | The asymptotic geometry of 2-dimensional Artin groups |
| May 8, 2018 | Jacob Russell (CUNY) | Quasiconvexity in Hierarchically Hyperbolic Spaces |
| September 4, 2018 | Yulan Qing (Toronto) | Loops with Large Twist Get Short Along Quasi-geodesics in Out(Fn) |
| September 11, 2018 | No seminar today | |
| September 18, 2018 | No seminar today | |
| September 25, 2018 | Saul Schleimer (Warwick) | An introduction to veering triangulations |
| October 2, 2018 | Moritz Gruber (Karlsruhe & NYU) | Higher divergence of Heisenberg groups |
| October 9, 2018 | No seminar today | |
| October 16, 2018 | Nick Salter (Columbia) | The non-realizability of braid groups by diffeomorphisms |
| October 23, 2018 | Ken Bromberg (Utah) | The gradient flow for renormalized volume |
| October 30, 2018 | David Fisher (Indiana) | Group actions, warped cones and expanders |
| November 6, 2018 | No seminar today | General election: go vote! |
| November 13, 2018 | Ilya Kapovich (CUNY) | Index properties of random automorphisms of free groups |
| November 20, 2018 | No seminar today | |
| November 27, 2018 | Valentina Disarlo (Heidelberg) | Cubical geometry in the polygonalization complex |
| December 4, 2018 | Tim Morris (Temple) | Non-abelian covers of knots from the Alexander polynomial |
| February 4, 2020 | Chenxi Wu (Rutgers) | Kazhdan's theorem for metric graphs |
| February 11, 2020 | Merlin Incerti-Medici (Universität Zürich) | Circumcenter extensions of cross-ratio preserving maps on Hadamard manifolds |
| February 18, 2020 | No seminar today | February 25, 2020 | No seminar today | Department meeting and colloquium |
| March 3, 2020 | Daniel Berlyne (CUNY) | Graph products as hierarchically hyperbolic groups |
| March 10, 2020 | Christoforos Neofytidis (Ohio State U) | Gromov-Thurston norms for circle bundles and for fibrations over the circle |
| March 17, 2020 | ||
| March 24, 2020 | No seminar today | rescheduled for next semester |
| March 31, 2020 (via zoom at 5pm) |
Jessica Purcell (Monash) | The triangulation complexity of fibred 3-manifolds ( Slides ) |
| April 7, 2020 | No seminar today | CUNY on Wednesday Schedule |
| April 14, 2020 | No seminar today | CUNY holiday |
| April 21, 2020 (via zoom) |
Dave Futer (Temple) | Infinitely many virtual geometric triangulations ( Slides , Video ) |
| April 28, 2020 | Anastasia Tsveitkova (Rutgers) (via zoom) |
The number of surfaces of fixed genus embedded in a 3-manifold ( Video ) |
| May 5, 2020 | Hongbin Sun (Rutgers) (via zoom) |
Subgroup separability and subgroup distortion of 3-manifold groups ( Slides ) |
| September 1, 2020 (via zoom) |
Sam Shepherd (Oxford) | Quasi-isometric rigidity of generic cyclic HNN extensions of free groups |
| September 8, 2020 (via zoom) |
Joshua Greene (Boston College) | The rectangular peg problem |
| September 15, 2020 (via zoom) |
Hung C. Tran (Oklahoma) | Divergence of finitely presented groups |
| September 22, 2020 (via zoom) |
Hannah Turner (UT Austin) | Links all of whose branched covers are L-spaces |
| September 29, 2020 | No seminar today, CUNY on Monday schedule | |
| October 6, 2020 (via zoom) |
Brandon Bavier (MSU) | Cusp Volumes of Alternating Knots on Surfaces |
| October 13, 2020 (via zoom) |
Ivan Levcovitz (Technion) | Characterizing divergence in right-angled Coxeter groups |
| October 20, 2020 (via zoom) |
Davide Spriano (Oxford) | Quasi-isometric invariance of Hierarchically Hyperbolic Groups |
| October 27, 2020 (via zoom) |
Alex Taam (Stevens) | Quasi-isometric rigidity of graphs of surface groups |
| November 3, 2020 (via zoom) |
Rylee Lyman (Rutgers) | Nielsen realization for infinite-type surfaces |
| November 10, 2020 (via zoom) |
Rhea Palak Bakshi (George Washington) | On the structure of skein modules |
| November 17, 2020 (via zoom) |
Kyle Hayden (Columbia) | Knotty algebraic curves |
| November 24, 2020 (via zoom) |
Marissa Miller (UIUC) | Handlebody group of genus two as an HHG |
| December 1, 2020 (via zoom) |
Sangrok Oh (KAIST) | Quasi-isometry invariant of weakly special square complexes |
| December 8, 2020 (via zoom) |
Hans Boden (McMaster) | The Jones-Krushkal polynomial and minimal diagrams of surface links |
| February 23, 2021 | Christopher Cashen (Vienna) | Snowflakes, shortcuts, and asymptotic cones |
| March 2, 2021 | Harry Petyt (Bristol) | Bicombing the mapping class group |
| March 9, 2021 | Ian Runnels (Virginia) | RAAGs in MCGs |
| March 16, 2021 | Mark Hagen (Bristol) | Mapping class groups have unique asymptotic cones |
| March 23, 2021 | Christine Ruey Shan Lee (U South Alabama) | Normal surface theory and the colored Jones polynomial |
| March 30, 2021 | No seminar today | CUNY holiday |
| April 6, 2021 | Thang Le (Georgia Tech) | Skein algebra of surfaces |
| April 13, 2021 | Maria Cumplido Cabello (Sevilla) | Parabolic subgroups of large-type Artin groups |
| April 20, 2021 | Gage Martin (Boston College) | Annular Khovanov homology and meridional disks |
| April 27, 2021 | Alex Rasmussen (Utah) | Actions of certain solvable groups on hyperbolic metric spaces |
| May 4, 2021 | Siddhi Krishna (Georgia Tech) | Taut foliations, Dehn surgery, and Braid Positivity |
| May 11, 2021 | Anh Tran (UT Dallas) | Classical pretzel knots and left orderability |
| May 18, 2021 | Vadim Kaimanovich (Ottawa) | Probabilistic boundary of the mapping class group |
| September 14, 2021 (via zoom) |
Sayantan Khan (Michigan) | The limit set of non-orientable mapping class groups |
| September 21, 2021 (via zoom) |
Tim Susse (Bard College at Simon's Rock) | When is a RACG QI to a RAAG? |
| September 28, 2021 (via zoom) |
Sahana Balasubramanya (Munster) | Actions of solvable groups on hyperbolic spaces |
| October 5, 2021 (via zoom) |
Bena Tshishiku (Brown) | Convex cocompact subgroups of the Goeritz group |
| October 12, 2021 (via zoom) |
Marc Schilder (Buffalo) | The A-Polynomial and Knot Volume |
| October 19, 2021 (via zoom) |
Annette Karrer (Technion) | Contracting boundaries of right-angled Coxeter groups |
| October 26, 2021 (via zoom) |
MurphyKate Montee (Carleton) | Cubulating Random Groups at Densities less than 3/14 |
| November 2, 2021 (via zoom) |
Dongryul Kim (Yale) | SLLN for asymptotic translation lengths of random isometries on Gromov hyperbolic spaces and Teichmuller spaces |
| November 9, 2021 (via zoom) |
Sam Hughes (Oxford) | Invariants of quasi-isometries of pairs |
| November 16, 2021 (via zoom) |
Emily Thompson (Monash) | Twisting, ladder graphs and A-polynomials |
| November 23, 2021 (via zoom) |
Alexandre Martin (Heriot-Watt) | Hierarchical hyperbolicity of Artin groups of extra-large type |
| November 30, 2021 (via zoom) |
Moshe Cohen (SUNY New Paltz) | The average genus of a 2-bridge knot grows linearly with respect to crossing number |
| December 7, 2021 (via zoom) |
Joseph Boninger (CUNY GC) | The Jones Polynomial from a Goeritz Matrix |
| February 22, 2022 joint with Hyp Geom Seminar (via zoom) |
Rich Schwartz (Brown) | A case of pentagram rigidity |
| March 1, 2022 (in person! Room: TBA) |
Joseph Maher (CUNY) | Random walks on geometric groups |
| April 12, 2022 (in person!) |
Diana Hubbard (CUNY) | The fractional Dehn twist coefficient: from braids to mapping class groups |
| April 26, 2022 (in person!) |
Rose Kaplan-Kelly (Temple) | Right-angled links in thickened surfaces |
| September 13, 2022 | Rylee Lyman (Rutgers) | CTs for free products |
| September 20, 2022 | Gabriel Montoya Vega (CUNY) | Viro's approach to Khovanov Homology |
| September 27, 2022 | No seminar today | |
| October 4, 2022 | No seminar today | |
| October 11, 2022 | Ilya Kofman (CUNY) | Geometric bounds for spanning tree entropy of planar lattices |
| October 18, 2022 | Daniele Alessandrini (Columbia) | Domains of discontinuity for Anosov representations |
| October 25, 2022 | Nick Vlamis (CUNY) | Anderson’s Trick and Homeomorphism groups of self-similar 2-manifolds |
| November 1, 2022 | Harry Baik (KAIST) | Revisit the theory of laminar groups |
| November 8, 2022 | Inhyeok Choi (KAIST) | Random subgroup is quasi-isometrically embedded |
| November 15, 2022 | Ben Cooper (Iowa) | An incompatibility between spectrification and the Szabo spectral sequence |
| February 7, 2023 | Priyadip Mondal (Rutgers) | Hidden symmetries and Dehn fillings |
| February 14, 2023 | Abhijit Champanerkar (CUNY) | Right-angled volume of alternating links |
| February 21, 2023 | No seminar today | CUNY on Monday Schedule |
| February 28, 2023 | Siddhi Krishna (Columbia) | Twist positivity, Lorenz knots, and concordance |
| March 7, 2023 | Francesco Lin (Columbia) | Homology cobordism and the geometry of hyperbolic three-manifolds |
| March 14, 2023 | Dragomir Saric (CUNY) | Farey triangulation, shears and circle maps |
| March 21, 2023 | Kyle Hayden (Rutgers) | A handle-holding approach to Wall-type stabilization problems |
| March 28, 2023 | Peter Shalen (UIC) | Hyperbolic volume, homology rank, and the Four Color Theorem |
| April 4, 2023 | No seminar today | |
| April 11, 2023 | No seminar today | CUNY Holiday |
| April 18, 2023 (NEW ROOM) | Jason Behrstock (CUNY) | Hierarchically hyperbolic groups: an introduction |
| April 25, 2023 | Zhenghao Rao (Brown) | Subgroups of Genus-2 Quasi-Fuchsian groups and Cocompact Kleinian Groups |
| May 2, 2023 | Lee Mosher (Rutgers) | The Two-over-All Theorem and its Applications | May 16, 2023 3:30pm (special time) |
Harry Baik (KAIST) | Reducible normal generators of the mapping class groups |
| September 12, 2023 | Subhadip Dey (Yale) | Combination Theorems for Anosov Subgroups |
| September 19, 2023 Special time today: 1:30-2:30pm in math thesis room and on Zoom |
Kuwari Mahanta (Indian Institute of Technology) | Distance 4 curves in the curve graph |
| September 26, 2023 | No seminar today | |
| October 3, 2023 | Ross Akhmechet (Columbia) | Lattice cohomology and q-series invariants of 3-manifolds |
| October 10, 2023 | No seminar today | CUNY on Monday Schedule |
| October 17, 2023 | Alexander Lowenstein (Rutgers) | Deformation Groups Satisfy an Exponential Isoperimetric Inequality |
| October 24, 2023 | Sebastian Hurtado-Salazar (Yale) | Full limit set vs lattice |
| October 31, 2023 | Joe Boninger (Boston College) | Twisted knots and the perturbed Alexander invariant |
| November 7, 2023 | Fraser Binns (Princeton) | Link Floer Homology and (almost) braids |
| November 14, 2023 | Eric Samperton (Purdue) | Knots, hyperbolic geometry and quantum computers |
| November 21, 2023 | No seminar today | |
| November 28, 2023 | Alina Vdovina (CUNY) | Buildings, surfaces and quaternions |
| December 5, 2023 | Andrew Will (Brooklyn College) | Surface Links, Polynomial Coefficients, and Volume |
| February 6, 2024 | Kunal Chawla (Princeton) | Random walks on groups and superlinear divergent geodesics |
| February 13, 2024 | Rescheduled due to snow day | |
| February 20, 2024 | No seminar today | |
| February 27, 2024 | Diana Hubbard (CUNY) | Twisting in small and big mapping class groups |
| March 5, 2024 | Anubhav Mukherjee (Princeton) | An eye towards understanding of smooth mapping class group of 4-manifolds |
| March 12, 2024 | Søren Galatius (Copenhagen) | The Alexander trick for homology spheres |
| March 19, 2024 | Jenya Sapir (Binghamton) | The birthday problem for random surfaces |
| March 26, 2024 | No seminar today | |
| April 2, 2024 | Yi Wang (Penn) | Punctured JSJ tori and tautological extensions of Azumaya algebras |
| April 9, 2024 | Mahan Mj (TIFR) | Hyperbolic commensurated subgroups |
| April 16, 2024 | Sriram Raghunath (Rutgers) | Bounds on Pachner moves and systole lengths for cusped hyperbolic 3-manifolds |
| April 23, 2024 | No seminar today | |
| April 30, 2024 | No seminar today (Bruno Martelli is speaking at Columbia today) | See Columbia seminar page for time/location/title |
| May 7, 2024 | No seminar today (Bill Goldman is speaking at CUNY earlier in the day) |
|
| May 14, 2024 (talk one) 1:30 - 2:30 Room 4214.03 |
Michael Marinelli (CUNY) | Twisted Alexander Polynomials and Ptolemy Varieties of twist knots and surface bundles |
| May 14, 2024 (talk two) Usual time/place |
Carolyn Abbott (Brandeis) | Morse boundaries of CAT(0) cubical groups |
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