University of Oklahoma   Mathematics Department

Geometry and Topology Seminar

Talks from earlier semesters.
Fall 2008 Talks
8/27 Organizational Meeting
9/3 Vera Tonic Bockstein basis and resolution theorems in extension theory
9/10 Vera Tonic A generalization of the Edwards-Walsh resolution theorem
9/17 Mike Jablonski Distinguished Riemannian metrics on Lie groups
9/24 Kasra Rafi A compactification for the space of singular Euclidean metrics on a surface *held at OSU*
10/1 Mike Jablonski Distinguished Riemannian metrics on Lie groups - II
10/8 James Dover Chromatic numbers, Lovasz complexes, equivariant homotopy, and Stiefel-Whitney classes
10/15 Sang Rae Lee Quasi-isometric rigidity of Zn (continued on Oct 21, 4pm)
10/22 James Dover Chromatic numbers, Lovasz complexes, equivariant homotopy, and Stiefel-Whitney classes - II
10/29 Hyam Rubinstein (Melbourne) Minimal triangulations of 3-manifolds (OU-OSU series)
11/5 Yael Algom-Kfir (Utah) Negative Curvature phenomena in Outer Space
11/12 Kashyap Rajeevsarathy Bounding the Hempel distance of Haken manifolds (continued on Nov 18, 4pm)
11/19 Matt Clay Twisting out fully irreducible automorphisms *held at OSU*
11/26 Thanksgiving Holiday
12/3 Robert Myers (Oklahoma State) Concordance of Seifert Surfaces (OU-OSU series)

Spring 2008 Talks
1/16 Jan Dijkstra (Free Univ. Amsterdam) Homeomorphism groups of manifolds and Erdős space
1/23 no talk
1/30 no talk
2/6 Leonard Rubin Extension theory and direct limits
2/13 Nikola Petrov Reduction of invariant fields and differential operators
2/20 Nikola Petrov Reduction of invariant fields and differential operators II
2/27 Chris Leininger (UIUC) Cannon-Thurston maps and the complex of curves (OU-OSU series)
3/5 Ajit Bhand Fat Riemannian submersions
3/12 Ajit Bhand Fat Riemannian submersions II
3/19 Spring Break
3/26 Eduardo Martinez Quasiconvex subgroups of relatively hyperbolic groups
4/2 Jesse Johnson (Yale) Stabilizing and flipping Heegaard splittings *held at OSU*
4/9 Stephan Tillmann (Melbourne) Applications of tropical geometry to groups and manifolds (OU-OSU series)
4/16 no talk
4/23 4/24 Feng Luo (Rutgers) Normal surfaces and angle structures on 3-manifolds (OU-OSU series)
4/30 Eduardo Martinez thesis defense

Fall 2007 Talks
8/22 Organizational Meeting
8/29 Leonard Rubin Universal compacta in extension theory
9/5 Leonard Rubin Universal compacta in extension theory II
9/12 Burkhard Wilking (Münster) (Singular) Riemannian foliations in non-negative curvature
9/19 Pallavi Dani Conjugacy classes of finite subgroups
9/26 Weiping Li (Oklahoma State) L2-Alexander invariant of knots
10/3 Darryl McCullough Tunnels, rational tangles, and the cabling construction
10/10 Darryl McCullough Bridge numbers of tunnel number 1 knots
10/17 Graham Denham (Western Ontario) Generalized moment-angle complexes
10/24 Ravi Shankar Conjugate points on length spaces
10/31 Matt Clay Growth rate of intersection numbers for free group automorphisms   [held at OSU]
11/7 no talk
11/14 K. B. Lee Unimodular groups of type R3 \rtimes R1
11/21 Thanksgiving Holiday
11/28 Maggy Tomova (Rice) Bridge surfaces and the information they carry

Spring 2007 Talks
1/10 Susumu Hirose (Saga University) Presentations of periodic maps by Dehn twists
1/17 no talk
1/24 Organizational meeting
1/31 Sangbum Cho Disk complexes and tunnel number 1 knots [held at OSU]
2/7 Eduardo Martinez A combination theorem for subgroups of relatively hyperbolic groups
2/14 Eduardo Martinez A combination theorem for subgroups of relatively hyperbolic groups II
2/21 Antara Mukherjee Hyperbolic groups that fiber in infinitely many ways
2/28 Joseph Maher (Oklahoma State) Linear progress in the complex of curves
3/7 Ravi Shankar Exotic spheres and curvature: a survey
3/14 Ravi Shankar Exotic spheres and curvature: a survey II
3/21 Spring Break
3/28 no talk (some are traveling to Rolla)
4/4 Ravi Shankar Exotic spheres and curvature: a survey III
4/11 Max Forester Density of isoperimetric spectra [held at OSU]
4/18 David Constantine (U. Michigan) Frame flow dynamics and rank rigidity
4/25 Gerard Walschap Metric and homogeneous fibrations
5/2 Shihshu Walter Wei p-Harmonic geometry, topology and analysis

Fall 2006 Talks
8/30 Sangbum Cho The Goeritz group of genus two
9/6 Sangbum Cho The Goeritz group of genus two II
9/13 Jean-Francois Lafont (Ohio State) Positivity of simplicial volume of certain locally symmetric spaces
9/20 Andy Miller Orientation reversing actions on lens spaces and Gaussian integers
9/27 no seminar
10/4 Joseph Maher (Oklahoma State) Random walks on the mapping class group
10/11 Matt Clay Deformation spaces of G-trees
10/18 Matt Clay Deformation spaces of G-trees II
10/25 Vera Tonic A compact metrizable space with infinite covering dimension and finite integral cohomological dimension
11/1 Vera Tonic A compact metrizable space with infinite covering dimension and finite integral cohomological dimension II
11/8 Darryl McCullough The tree of knot tunnels
11/15 Darryl McCullough The tree of knot tunnels II
11/22 Thanksgiving Holiday
11/29 Ben Schmidt (U. Chicago) Weakly hyperbolic group actions

Spring 2006 Talks
1/18Ivan Ivansic (Zagreb) Local characterization of absolute co-extensors
1/25Max Forester High dimensional filling invariants of groups
2/1Max Forester High dimensional filling invariants of groups II
2/8Ed Swartz (Cornell) Matroids in geometry and topology
2/15K. B. Lee Riemannian foliations on hyperbolic spaces
2/22K. B. Lee Riemannian foliations on hyperbolic spaces II
3/1Robert Sulman Affine groups described in terms of the residue
3/8Max Forester Dehn functions and the topology of manifolds
3/15Spring Break
3/22Ara Basmajian Geometrically infinite surfaces with discrete length spectra
3/29Youngju Kim Geometrically infinite surfaces with discrete length spectra II
4/5no seminar
4/12Taechang Byun Dual foliations
4/19no seminar Special Lecture by V. S. Varadarajan
4/26Timothy Frye Normalizer series in free groups
5/3Dušan Repovš (Ljubljana) Geometric topology of planar continua

Fall 2005 Talks
8/31Jason Manning (Caltech) A coarse geometric Dehn filling theorem
9/7
9/14Darryl McCullough Nielsen equivalence and T-systems
9/21Darryl McCullough Nielsen equivalence and T-systems--II
9/28Darryl McCullough Nielsen equivalence and T-systems--III
10/5Leonard Rubin Universal Compacta in Extension Theory
10/12Pallavi Dani The asymptotic density of torsion elements in infinite groups
10/19Pallavi Dani The asymptotic density of torsion elements in infinite groups II
10/26
11/2Josh Barnard Distortion of surface groups in CAT(0) free-by-cylic groups
Colloquia and Seminars Math Home OU Home