The Geometry and Topology Research Seminar regularly meets on Monday at 2:00 in Skiles 006 unless otherwise indicated.

**Fall 2022**

The Geometry and Topology Seminar will sometimes be run in-person and sometimes on-line. If the title has an * by it, then it will be an on-line seminars and a link will be sent to the geometry-topology group before each seminar. In-person seminars will be in Skiles 006. Talks start at 2:00.

Date |
Title |
Speaker |
Institute |

Dec 12 | TBA | Giuseppe Martone | Yale |

Dec 5 | Multisections, the pants complex, and Weinstein manifolds | Gabe Islambouli | UC, Davis |

Nov 28 | TBA | Tina Torkaman | Harvard |

Nov 21 | Naturality of Legendrian LOSS invariant under positive contact surgery | Shunyu Wan | U Virginia |

Nov 16 | Fillability of Contact Structures on the 3-manifolds obtained by surgeries on the trefoil knot UGA Boyd 322, 4:30 (Wednesday) |
Nur Saglam | Ga Tech |

Nov 16 | Obstructing Reducible Surgeries: Slice Genus and Thickness Bounds UGA Boyd 322, 3:00 (Wednesday) |
Robert DeYoso | U. Iowa |

Nov 14 | Graph Analogues of Big Mapping Class Groups: Coarse Geometry | George Domat | Rice University |

Nov 7 | Does the Jones polynomial of a knot detect the unknot? A novel approach via braid group representations and class numbers of number fields (on line) | Amitesh Datta | Princeton |

Oct 31 | Wild Rose, Narcissus and other Elliptic Flowers: a new class of billiards with surprising properties. | Leonid Bunimovich | Ga Tech |

Oct 24 | Diagrams for contractible spaces of 4-manifolds Start at 4:30 |
Dave Gay | UGA |

Oct 24 | An A-infinity category from instantons Start at 3:00 |
Sherry Gong | Texas A&M |

Oct 17 | No Seminar: Fall Break |
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Oct 10 | Asymptotics of surface group representations along rays | Mike Wolf | Ga Tech |

Oct 3 | Geography of surface bundles over surfaces | Inanc Baykur | U Mass |

Sept 26 | The stable cohomology of the level-l subgroup of the mapping class group UGA Boyd 322, 4:30 |
Andy Putman | Notre Dame |

Sept 26 | Obstructions to Reversing Lagrangian Surgery UGA Boyd 322, 3:00 |
Orsola Capovilla-Searle | UC, Davis |

Sept 19 | Hyperbolic models for CAT(0) spaces | Abdul Zalloum | University of Toronto |

Sept 12 | Families of Lefschetz Fibrations via Cyclic Group Actions | Nur Saglam | Ga Tech |

Sept 5 | No Seminar: Labor Day | ||

Aut 29 | Combinatorial Surgery Graphs on Unicellular Maps | Abdoul Karim Sane | Ga Tech |

Aug 22 | Mapping Class Groups of Sliced Loch Ness Monsters | Ryan Dickmann | Ga Tech |

**Spring 2022**

The Geometry and Topology Seminar will sometimes be run in-person and sometimes on-line. If the title has an * by it, then it will be in-person in Skiles 006. For on-line seminars a link will be sent to the geometry-topology group before each seminar.

Date |
Title |
Speaker |
Institute |

Apr 25 | Strict hyperbolization and special cubulation | Ruffoni, Lorenzo | Tufts University |

Apr 18 | Relating the untwisting and surgery description numbers* | Samantha Allen | UGA |

Apr 11 | Upsilon invariant for graphs and homology cobordism group of homology cylinders* | Akram Alishahi | UGA |

Apr 4 | Connected sum formula of embedded contact homology* | Luya Wang | Berkeley |

Mar 29 | Complex Ball Quotients and New Symplectic 4-Manifolds with Nonnegative Signatures* Time 3:00pm, note this talk is on Tuesday |
Sumeyra Sakalli | University of Arkansas |

Mar 28 | Quasi-morphisms on Surface Diffeomorphism groups | Jonathan Bowden | Universität Regensburg |

Mar 21 | No Seminar: Spring Break | ||

Mar 14 | The Grand Arc Graph — A “curve graph” for infinite-type surfaces | Assaf Bar-Natan | University of Toronto |

Mar 7 | An invariant for families of contact structures in monopole Floer homology* | Juan Muñoz-Echániz | Columbia University |

Feb 28 | Finite-order mapping classes of del Pezzo surfaces | Seraphina Lee | University of Chicago |

Feb 21 | Symplectic Lefschetz fibrations, rational blowdowns, and small exotic 4-manifolds* | Jonathan Simone | Georgia Tech |

Feb 14 | Abelian cycles in the homology of the Torelli group | Erik Lindell | University of Stockholm |

Feb 7 | Stable commutator length on big mapping class groups | Elizabeth Field | University of Utah |

Jan 31 | Stein property of complex-hyperbolic Kleinian groups | Subhadip Dey | Yale university |

Jan 24 | The diffeomorphism group of a 4-manifold | Danny Ruberman | Brandeis University |

Jan 17 | No Seminar: MLK Day |

**Fall 2021**

The Geometry and Topology Seminar will sometimes be run in-person and sometimes on-line. If the title has an * by it, then it will be in-person in Skiles 006. For on-line seminars a link will be sent to the geometry-topology group before each seminar.

Date |
Title |
Speaker |
Institute |

Nov 29 | Applications of contact geometry to 3-dimensional Anosov dynamics | Federico Salmoiraghi | Technion |

Nov 22 | Open | ||

Nov 15 | Detection results in link Floer homology * | Subhankar Dey | University of Alabama |

Nov 8 | A Fox-Milnor Condition for 1-Solvable Links * | Shawn Williams | Rice |

Nov 1 | Classical and new plumbings bounding contractible manifolds and homology balls | Oğuz Şavk | Boğaziçi University |

Oct 25 | Open | ||

Oct 18 | On amphichirality of symmetric unions | Ceren Kose | U Texas, Austin |

Oct 11 | No Seminar: Fall Break |
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Oct 4 | Invariants of rational homology 3-spheres from the abelianization of the mod-p Torelli group |
Ricard Riba Garcia | UAB Barcelona |

Sept 27 | Invariance of Knot Lattice Homology | Seppo Niemi-Colvin | Duke University |

Sept 20 | Mitsumatsu’s Liouville domains are stably Weinstein * | Austin Christian | Ga Tech |

Sept 13 | A curve graph for Artin groups | Rose Morris-Wright | UCLA |

Sept 6 | No Seminar: Labor Day | ||

Aug 30 | Chi-slice 3-braid links * | Jon Simone | Ga Tech |

**Spring 2021**

The Geometry and Topology Seminar will be held online this semester due to COVID-19. Please contact John Etnyre for the link to the seminars if you are interested.

Date |
Title |
Speaker |
Institute |

Jul 7 | Brached cyclic covers and L-spaces | Hannah Turner | U Texas, Austin |

May 3 | Normal surface theory and colored Khovanov homology | Christine Ruey Shan Lee | University of South Alabama |

Apr 26 | On the length of the shortest closed geodesic on positively curved 2-spheres | Franco Vargas Pallete | Yale University |

Apr 19 | 3-manifolds that bound no definite 4-manifold | Marco Golla | Université de Nantes |

Apr 12 | Diffeomorphisms of the 4-sphere, Cerf theory and Montesinos twins | David Gay | University of Georgia |

Apr 5 | Right-veering open books and the Upsilon invariant | Diana Hubbard | Brooklyn College |

Mar 29 | Topology of the Shift Locus via Big Mapping Class Groups | Yan Mary He | University of Toronto |

Mar 22 | Infinite-type surfaces and the omnipresent arcs | Tyrone Ghaswala | CIRGET, Université du Québec à Montréal |

Mar 15 | Big mapping class groups and rigidity of the simple circle | Lvzhou Chen | UT Austin |

Mar 8 | Open | ||

Mar 1 | Open | ||

Feb 22 | Julia sets with Ahlfors-regular conformal dimension one | InSung Park | Indiana University Bloomington |

Feb 15 | Presidents DayNo Seminar: |
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Feb 8 | Braids, quasimorphisms, and slice-Bennequin inequalities | Peter Feller | ETH Zurich |

Feb 1 | Symmetric knots and the equivariant 4-ball genus |
Ahmad Issa | University of British Columbia |

Jan 25 | The asymptotic dimension of big mapping class groups |
Yvon Verberne | Georgia Tech |

Jan 18 | No Seminar: MLK Day |
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Jan 11 | Identifying Dehn Functions of Bestvina–Brady Groups From Their Defining Graphs |
Yu-Chan Chang | Emory |

**Fall 2020**

The Geometry and Topology Seminar will be held online this semester due to COVID-19. Please contact John Etnyre for the link to the seminars if you are interested.

Date |
Title |
Speaker |
Institute |

Nov 23 | Taut foliations and Dehn surgery along positive braid knots |
Siddhi Krishna | Georgia Tech |

Nov 16 | RAAGs in MCGs |
Ian Runnels | University of Virginia |

Nov 9 | A Combinatorial Description of the knot concordance invariant epsilon |
Hakan Doga | University at Buffalo |

Nov 2 | Knots and Links in overtwisted contact structures |
Rima Chatterjee | LSU |

Oct 26 | Embedding closed hyperbolic 3-manifolds in small volume hyperbolic 4-manifolds |
Michelle Chu | University of Illinois at Chicago |

Oct 19 | Ribbon homology cobordism |
Shea Vela Vick | LSU |

Oct 12 | A contact invariant from bordered Heegaard Floer homology |
Ina Petkova | Dartmouth |

Oct 5 | Open | ||

Sep 28 | SL3 Skein Algebras of Surfaces |
Vijay Higgins | UC Santa Barbara |

Sep 21 | The embedded contact homology of prequantization bundles |
Morgan Weiler | Rice |

Sep 14 | L-space surgeries on 2-component L-space links |
Beibei Liu | Georgia Tech |

Sept 7 | No Seminar: Labor Day | ||

Aug 31 | Triple linking and Heegaard Floer homology |
Allison Moore | Virginia Commonwealth University |

Aug 24 | Equivalence relations on 4 manifolds |
Mark Powell | Durham University |

Aug 17 | SU(2) representations for toroidal homology spheres |
Tye Lidman | NCSU |

**Spring 2020**

The Geometry and Topology Seminar has been cancelled starting March 30 due to the shutdown of on campus activities related to COVID-19.

Date |
Title |
Speaker |
Institute |

April 20 | TBD |
University of Illinois at Chicago | |

April 13 | TBD |
Princeton | |

April 6 | TBDTime: 3:30 |
Virginia Commonwealth University | |

April 6 | TBD |
Rice | |

Mar 30 | TBD |
MPI | |

Mar 23 | Cancelled |
— | — |

Mar 16 | No Seminar: Spring Break |
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Mar 9 | Satellite operations and knot genera |
Allison Miller | Rice |

The dihedral genus of a knotUGA, Boyd 221, 4:00 |
Patricia Cahn | Smith College | |

Mar 2 | Stein domains in complex two space with prescribed boundaryUGA, Boyd 221, 2:30 |
Bulent Tosun | University of Alabama |

Feb 24 | From veering triangulations to link spaces and back again |
Henry Segerman | Oklahoma State University |

Feb 17 | Spaces of trees and fatgraphs for string topology and moduli spaces |
Kate Poirier | CUNY – City College of Technology |

Feb 13 | The Frohman-Kania-Bartoszynska invariant is the 3D index (note special date) |
Stavros Gafoufalidis | SUSTECH and MPI Bonn |

Feb 10 | Brieskorn spheres bounding rational ballsTime: 3:30 |
Kyle Larson | UGA |

Feb 10 | Homotopy invariants of homology cobordism and knot concordance |
Kent Orr | Indiana University |

Feb 3 | Annular Rasmussen invariants: Properties and 3-braid classification |
Gage Martin | Boston College |

Jan 27 | The coalgebra of singular chains and the fundamental group |
Manuel Rivera | Purdue University |

Jan 20 | No Seminar: MLK Day |
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Branched covers bounding rational homology ballsUGA, Boyd 221, 4:00 |
JungHwan Park | Ga Tech | |

Jan 13 | Knot Floer homology and cosmetic surgeries UGA, Boyd 221, 2:30 |
Jonathan Hanselman | Princeton University |

Jan 6 | Localization in Khovanov homology |
Melissa Zhang | UGA |

**Fall 2019**

Date |
Title |
Speaker |
Institute |

Dec 9 | Classifying contact structures on hyperbolic 3-manifoldsSkiles 202, Time 2:30 |
James Conway | UC, Berkeley |

Dec 2 | Residual Torsion-Free Nilpotence and Two-Bridge Knot Groups |
Jonathan Johnson | UT, Austin |

Nov 25 | Classifying incompressible surfaces in hyperbolic 4-punctured sphere mapping tori | Sunny Xiao | Brown University |

Nov 18 | A generalization of Rasmussen’s invariant, with applications to surfaces in some four-manifoldsUGA, Boyd 303, 4:00 |
Marco Marengon | UCLA |

Nov 18 | Concordance invariants from branched coverings and Heegaard Floer homologyUGA, Boyd 221, 2:30 |
Antonio Alfieri | UBC |

Nov 11 | Seminar Cancelled |
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Nov 4 | Koszul duality and Knot Floer homology |
Tom Hockenhull | University of Glasgow |

Oct 28 | Connected Floer homology of covering involutions |
Sungkyung Kang | Chinese University of Hong Kong |

Oct 21 | The geometry of subgroup combination theorems |
Jacob Russell | CUNY Graduate Center |

Oct 14 | No Seminar: Fall Break | ||

Oct 7 | Upper bounds on the topological slice genus via twisting operationsTime: 3:30 |
Duncan McCoy | UQAM |

Oct 7 | Smooth 4-Manifolds and Higher Order Corks |
Paul Melvin | Bryn Mawr College |

Sept 30 | Surface bundles and complex projective varieties |
Corey Bregman | Brandeis University |

Sept 23 | Intrinsic Combinatorics for the Space of Generic Complex Polynomials |
Michael Dougherty | Colby College |

Sept 16 | The “generating function” of configuration spaces, as a source for explicit formulas and representation stability |
Nir Gadish | Massachusetts Institute of Technology |

Sept 9 | Link Concordance and Groups |
Miriam Kuzbary | Georgia Tech |

Sept 2 | No Seminar: Labor Day | ||

Aug 26 | Dynamical Mapping Classes |
Jasmine Powell | University of Michigan |

Aug 13 | Group Actions and Cogroup Coactions in Simplicial Sheaves |
Jonathan Beardsley | Georgia Tech |

**Spring 2019**

Date |
Title |
Speaker |
Institute |

May 31 | Factorization homology: sigma-models as state-sum TQFTs |
David Ayala | Montana State University |

May 29 | Rational cobordisms and integral homology |
Paolo Aceto | University of Oxford |

May 15 | Flag moduli spaces and Legendrian surfaces |
Roger Casals | UC Davis |

May 13 | Translational scissors congruence |
Inna Zakharevich | Cornell |

Apr 22 | On the topological expressiveness of neural networks |
Eli Grigsby | Boston College |

Apr 22 | Simply-connected, spineless 4-manifolds |
Adam Levine | Duke University |

Apr 15 | Doubly slice knots and L^2 signatures |
Patrick Orson | Boston College |

Apr 8 | Heegaard Floer homology and non-zero degree maps |
Tye Lidman | NCSU |

Apr 3 | Moebius bands in S^1xB^3 and the square peg problem |
Peter Feller | ETH Zurich |

Apr 1 | Embedding Seifert fibered spaces in the 4-sphere |
Ahmad Issa | University of Texas |

Mar 25 | A surface construction for colored Khovanov homologyUGA, Boyd 328, 4:00 pm |
Christine Ruey Shan Lee | University of South Alabama |

Mar 25 | A spectral sequence from Khovanov homology to knot Floer homologyUGA, Boyd 328, 2:30 pm |
Nathan Dowlin | Dartmouth |

Mar 18 | No Seminar: Spring break |
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Mar 11 | Using 2-torsion to obstruct topological isotopy |
Hannah Schwartz | Bryn Mawr |

Mar 4 | The nu+ equivalence class of genus one knots |
Kouki Sato | University of Tokyo |

Feb 25 | Knots in homology spheres, concordance, and crossing changesTime: 3:30 |
Chris Davis | U Wisconsin Eau Claire |

Feb 25 | Knot Traces and the Slice Genus |
Lisa Piccirillo | UT Austin |

Feb 18 | Heegaard Floer and the homology cobordism group |
Jen Hom | Georgia Tech |

Feb 11 | Simplification of singularities of Lagrangian and Legendrian fronts | Daniel Álvarez-Gavela | IAS |

Feb 1 | Acylindrical hyperbolicity of non-elementary convergence groups | Bin Sun | Vanderbilt |

Jan 28 | Link Floer homology and the stabilization distance UGA, Boyd 328, 4:00 pm |
Ian Zemke | Princeton University |

Jan 28 | Knot Concordances in S^1 x S^2 and Constructing Akbulut-Ruberman Type Exotic 4-Manifolds UGA, Boyd 328, 2:30 pm |
Eylem Yildiz | Michigan State University |

Jan 21 | No Seminar: MLK Day |

**Fall 2018**

Date |
Title |
Speaker |
Institute |

Dec. 3 | Maximal Weinstein domains |
Oleg Lazarev | Columbia University |

Nov 19 | The arithmetic of orientation-reversing mapping classes |
Livio Liechti | Paris-Jussieu |

Nov 16 | Counting incompressible surfaces and the 3D-index |
Stavros Garoufalidis | Georgia Tech & MPI |

Nov 12 | Affine Grassmannians in motivic homotopy theory |
Tom Bachmann | MIT |

Nov 5 | A family of freely slice good boundary links |
Min Hoon Kim | Korea Institute for Advanced Study |

Oct 29 | Stable homotopy invariants for links UGA, Boyd 328, 4:00 pm |
Patrick Orson | Boston College |

Oct 29 | A ribbon obstruction and derivatives of knotsUGA, Boyd 328, 2:30 pm |
JungHwan Park | Georgia Tech |

Oct 22 | Genuine Equivariant Operads |
Luis Alexandre Pereira | Georgia Tech |

Oct 15 | The transverse invariant and braid dynamics |
Lev Tovstopyat-Nelip | Boston College |

Oct 8 | No Seminar: Fall Break |
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Oct 1 | The ribbon genus of a knotted surfaceTime 3:30 |
Jason Joseph | UGA |

Oct 1 | A contact Fukaya category |
Lenny Ng | Duke University |

Sept 24 | Link Concordance and Groups |
Miriam Kuzbary | Rice University |

Sept 17 | Non-isotopic embeddings of contact manifolds |
John Etnyre | Georgia Tech |

Sept 10 | Rational cobordisms and integral homology |
JungHwan Park | Georgia Tech |

Sept 3 | No Seminar: Labor Day | ||

Aug 27 | Khovanov homology via immersed curves in the 4-punctured sphereUGA, Boyd 328, 4:00 pm |
Artem Kotelskiy | Indiana University |

Aug 27 | Homological knot invariants and the unknotting numberUGA, Boyd 328, 4:00 pm |
Akram Alishahi | Columbia University |

**Spring 2018**

coming soon