Geometry & Topology Seminar Archive
Past Seminars:
Nov 15/18  Spiro Karigiannis, University of Waterloo  A curious system of second order nonlinear PDEs for U(m)structures on manifolds 
Oct 25/18  Mehmetcik Pamuk, McMaster University  Arbitrarily large factorizations in mapping class groups 
Nikolai Saveliev, University of Miami  On the Frøyshov invariant and monopole Lefschetz number  
Oct 18/18  Elizabeth Drellich, Swarthmore College  tba 
Oct 4/18  Jesse Madnick McMaster University 
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Sept 13/18  Tyrone Ghaswala McMaster University 
Amalgamated free products of circularly ordered groups 
Apr 27/18  Rita Gitik University of Michigan 
A new algorithm in group theory 
Apr 12/18  Elise Villella University of Pittsburgh 
Virtual GelfandZetlin polytopes 
Apr 5/18  Yulan Qing University of Toronto 
Loops with large twist get short along quasigeodesics in 
Mar 29/18  Andreas Arvanitoyeorgos University of Patras 
Homogeneous geodesics and twostep homogeneous geodesics in homogeneous spaces 
Mar 22/18  Patrick Naylor University of Waterloo 
Surface bundles over surfaces 
Mar 22/18  Erik Pedersen (University of Copenhagen): 
Controlled algebra and topological data analysis 
Mar 8/18  Giulio Tiozzo (University of Toronto): 
Counting loxodromic elements 
Feb 15/18  Kasia Jankiewicz McGill University 
Cubical dimension of small cancellation groups 
Feb 1/18  王常亮 McMaster University 
Perelman's functionals on compact manifolds with isolated conical singularities 
Jan 25/18  Matthias Nagel McMaster University 
Surface systems and triple linking numbers 
Jan 4/18  Dave Auckly Kansas State University 
Stable equivalence of smoothly knotted surfaces 
Dec 7/17  Tyrone Ghaswala University of Waterloo 
Coverings, groupoids, and embedding braids in mapping class groups 
Nov 30/17  David Duncan McMaster University 
Some open problems in gauge theory, symplectic geometry, and lowdimensional topology 
Nov 23/17  Christopher Davis University of Wisconsin at Eau Claire 
Concordance of knots in homology spheres and the solvable filtration 
Nov 17/17  Nikolai Saveliev University of Miami 
On gauge theoretic invariants of homology S1×S3 
Nov 9/17  Katherine Raoux Michigan State University 

Nov 2/17  Anja Randecker University of Toronto 
On Loch Ness monsters and wild singularities  a Halloweeninspired introduction to infinite translation surfaces 
Oct 26/17  Jonathan Hillman University of Sydney 
Complements of closed hypersurfaces in S4 
Oct 19/17  Matthias Nagel McMaster University 
Concordance and the GordonLitherland lattice 
Oct 12/17  George Dragomir McMaster University 
Metric transforms yielding Gromov hyperbolic spaces 
Oct 2/17  Klaus Kröncke University of Hamburg 
Stability of ALE Ricciflat manifolds under Ricciflow 
Sept 21/17  Hari Kunduri Memorial University of Newfoundland 
Geometric inequalities for black hole initial data sets 
Sept 14/17  Steven Boyer Département de mathématiques Université du Québec à Montréal 
Branched Covers of Quasipositive Links and LSpaces 
April 6/17  McKenzie Wang Math & Stats Dept McMaster University 
Some examples of ancient solutions to the Ricci flow 
Mar 23/17  Panagiotis Giannioti Waterloo 
Regularity theory for Type I Ricci flows 
Mar 30/17  Hans Boden McMaster University 
Slice obstructions for virtual knots 
Mar 16/17  Nima Anvari Math & Stats Dept McMaster University 
Equivariant RhoInvariants and Instanton Homology of Torus Knots 
Mar 9/17  Gary Kennedy Ohio State 
Topicalizing spherical varieties 
Mar 2/17  Larry Siebenmann  Analyzing surface flows using trees and the BendixsonMather 2disk 
Feb 23/17  Chris Herald University of Nevada, Reno 
Obtaining reduced Khovanov homology from traceless character varieties 
Feb 16/17  Megumi Harada McMaster University 
NewtonOkounkov bodies and integrable systems 
Feb 9/17  Balazs Elek Cornell 
Pizzas and KazhdanLusztig atlases on toric surfaces 
Feb 2/17  Tyrone Ghaswala Waterloo 
Mapping class groups, coverings, braids and groupoids 
Jan 25/17  Victor Mouquin University of Toronto 
One some holomorphic Poisson structures related to geometric representation theory 
Jan 19/17  Ali Aleyasin  The Calabi problem on edgecone manifolds 
Jan 12/17  Cagatay Kutluhan University of Buffalo 
Filtering the Heegaard Floer contact invariant 
Jan 5/17 
George Dragomir 
On the existence of closed geodesics on compact developable orbifolds 
Nov 18/16 
Steffen Marcus 
Fans of logarithmic structures 
Nov 11/16 
Doug Schultz 

Nov 4/16 
Changliang Wang 

Oct 21/16 
Kristen Hendricks 

Sept 30/16 
Alex Kuronya 
Positivity of line bundles and equations defining projective varieties 
Oct 7/16 
Maxime Fortier Bourque 

Sept 23/16 
Naoki Fujita 
NewtonOkounkov polytopes of Schubert varieties and folding method 
Sept 16/16 
Akos Nagy 

Mar 10/16 
Grigorios Fournodavlos 
Singular Ricci solitons and their stability under the Ricci flow 
Mar 3/16 
Matthias Nagel 

Feb 25/16 
Hiraku Abe 
The cohomology of Hessenberg varieties and representations of symmetric groups 
Feb 4/16 
Iva Halacheva 
The Gromov width of coadjoint orbits of the symplectic group 
Jan 14/16 
David Rosenthal 

Nov 26/15 
Peter Crooks 

Nov 20/15 
Martha Precup 

Nov 12/15 
Long Li 

Nov 5/15 
John Shareshian 

Oct 29/15 
Alejandro Betancourt de la Parra 

Oct 22/15 
Tatsuya Horiguchi 
The equivariant cohomology rings of regular nilpotent Hessenberg varieties in Lie type A 
Oct 8/15 
Federico Galetto 

Oct 1/15 
David Duncan 

Sept 24/15 
Jeremy Lane 

Sept 17/15 
Elisheva Adina Gamse 
Vanishing relations in the cohomology of the moduli space of parabolic bundles 
Sept 10/15 
Alexander Caviedes Castro 

Sept 3/15 
Chris Cornwell 
Understanding character varieties of knot complements and 2fold branched covers through the cord ring 
May 20/15 
Ergun Yalcin 
Group actions on spheres with rank one isotropy 
May 19/15 
Robert Oliver 
Automorphisms of pcompleted classifying spaces 
May 19/15 
Sune Precht Reeh 
Characteristic idempotents and fusion systems 
Apr 9/15 
Chris Herald 
A LagrangianFloer theory in the pillowcase arising from traceless representations of knot groups 
Mar 19/15 
Laurent Siebenmann 
Chambers and trees describing general foliations of the plane 
Mar 12/15 
Ergun Yalcin 

Feb 26/15 
Long Li 
On the convexity of the Mabuchi energy functional along geodesics 
Feb 12/15 
Steven Gindi 

Feb 5/15 
Jihyeon Jessie Yang 

Jan 29/15 
Matt Luther 

Jan 22/15 
Cynthia Curtis 
The SL(2,C) Casson invariant for knots and the Ahat polynomial 
Jan 15/15 
Alyson Hildum 

Dec 18/14 
Andreas Arvaniteorgeous 

Dec 4/14 
Ronald Fintushel 

Nov 27/14 
Thomas Murphy 

Nov 20/14 
Romina Arroyo 
Homogeneous Ricci solitons and the Alekseevskii conjecture in low dimensions 
Nov 13/14 
Eric Harper 
Virtual knots, almost classical knots, and their Alexander lnvariants 
Nov 6/14 
Alejandro Adem 

Oct 30/14 
Oleg Chterental 
Virtual Braids and Virtual Curve Diagrams 
Oct 23/14 
Shuguang Wang 

Oct 16/14 
Nikolai Saveliev 

Oct 2/14 
Nima Anvari 

Sep 25/14 
Ergun Yalcin 

Sep 18/14 
Long Li 

Apr 3/14 
Shahab Kalantari 
Asymptotic Resemblance: A new approach to define a large scale structure on a set 
Mar 27/14 
Peng Lu 
Shrinking Ricci solitons 
Mar 20/14 
Blake Winter 

Mar 13/14 
Eric Harper 
The Virtual Knot Group and its Alexander Invariants 
Mar 6/14 
Thomas Murphy 

Jan 30/14 
Dror BarNatan 

Jan 16/14 
Laurent Siebenmann 
Vignettes from the rise of differential topology 
Dec 5/13 
Diarmuid Crowley 
The topology of Stein fillable contact manifolds in higher dimensions 
Nov 28/13 
Chris Cappadocia 

Nov 14/13 
Thomas Murphy 

Nov 7/13 
Yunxia Chen 

Oct 31/13 
Alyson Hildum 

Oct 17/13 
Frederick Fong 

Oct 10/13 
Enxin Wu 

Oct 3/13 
Karene Chu 
Classification of flat virtual pure tangles 
Sep 19/13 
Anna Bertiger 

Sep 12/13 
Bruce Williams 

Apr 25/13 
Masoud Khakhali 
Spectral zeta functions, scalar curvature, and GaussBonnet theorems in noncommutative geometry 
Apr 4/13 
Nima Anvari 
Equivariant gauge theory and fourmanifolds 
Mar 28/13 
Reto Mueller 
Dynamical stability and instability of Ricciflat metrics 
Mar 21/13 
Saso Strle 
Unknotting number and concordance 
Mar 14/13 
Alexander Kolpakov Vanderbilt University 
Geometric and combinatorial optimality of the hyperbolic 24cell 
Mar 7/13 
Robert Haslhofer 
Quantitative stratification and the regularity of mean curvature flow 
Feb 28/13 
Mikhail Mazin 
Topology and combinatorics of certain compactified Jacobians 
Feb 14/13 
David Duncan 
A compactness result for the quilted Atiyah–Floer conjecture 
Feb 7/13 
Eric Harper 
Akbulut corks and nontrivial involutions on instanton Floer homology 
Jan 31/13 
Peter Samuelson 
Skein modules and the double affine Hecke algebra 
Jan 24/13 
Tomoo Matsumura 
Schubert calculus of weighted Grassmannians 
Jan 17/13 
Maria Buzano 
Ricci flow on homogeneous spaces 
Jan 10/13 
Aaron Smith 
The higher Riemann–Hilbert correspondence and extensions 
Nov 29/12 
Ruxandra Moraru 
Stable bundles on complex nilmanifolds 
Nov 22/12 
David Rosenthal 
On the coarse asymptotic dimension of groups 
Nov 15/12 
William Wylie 
Warped product rigidity 
Nov 8/12 
Daniel Ruberman 
Embeddings of nonorientable surfaces in 4manifolds 
Nov 1/12 
Jihyeon Jessie Yang 
"Limits" of schemes 
Oct 25/12 
Kate Petersen 
The Euclidean algorithm and primitive roots 
Oct 11/12 
Shintaro Kuroki 
Root systems of torus graphs and characterization of extended actions of torus manifolds 
Oct 4/12 
Adam Clay 
Leftorderability, foliations, Lspaces and graph manifolds 
Sep 20/12 
Kristin Shaw 
Obstructions to approximating tropical curves in surfaces 
Sep 13/12 
Owen Baker 
Hyperbolic group boundaries and CannonThurston maps 