Combinatorics Seminar
Questions or comments?

Posted November 15, 2017

4:30 pm - 5:30 pm Lockett 276
Josh Fallon, LSU

Criticality of Counterexamples to Edge-hamiltonicity on the Klein Bottle

Tutte and Thomas and Yu proved that 4-connected planar and projective-planar graphs, respectively, are hamiltonian. Grunbaum and Nash-Williams conjecture that 4-connected toroidal and Klein bottle graphs are hamiltonian. Thomassen constructed counterexamples to edge-hamiltonicity of four-connected toroidal and Klein bottle graphs. Ellingham and Marshall contribute to the characterization of four-connected toroidal graphs in which some edge is not on a hamilton cycle, showing a sort of criticality of Thomassen's counterexamples and their generalizations. In this talk, I will discuss the progress made toward determining hamiltonicity of 4-connected graphs on the torus and Klein bottle and show in Thomassen's Klein bottle counterexamples a criticality similar to that in toroidal graphs.

Algebra and Number Theory Seminar
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Posted August 23, 2017

Last modified October 20, 2017

Li Guo, Rutgers University at Newark

TBD

Algebra and Number Theory Seminar
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Posted November 12, 2017

3:10 pm - 4:00 pm
William Casper, Louisiana State University

TBD

Informal Topology Seminar
Questions or comments?

Posted August 23, 2017

Last modified October 24, 2017

Rob Quarles, Louisiana State University

TBD

Topology Seminar
Seminar website

Posted August 23, 2017

Last modified September 6, 2017

Shelly Harvey, Rice University

TBD

Harmonic Analysis Seminar
Abstract and additional information

Posted November 14, 2017

3:30 pm - 4:20 pm Lockett 285
Anton Zeitlin, LSU

Enumerative geometry and quantum integrable systems

Abstract: The miraculous correspondence between 3-dimensional Gauge theory and integrable models based on quantum groups was observed by Nekrasov and Shatashvili in 2009. That discovery led to a lot of interesting developments in mathematics, in particular in enumerative geometry, bringing a new life to older ideas of Givental, and enriching it with flavors of geometric representation theory via the results of Braverman, Maulik, Okounkov and many others. In this talk I will focus on recent breakthroughs, originating from the work of Okounkov on the subject, leading to proper mathematical understanding of Nekrasov-Shatashvili original papers.

Harmonic Analysis Seminar
Abstract and additional information

Posted November 14, 2017

3:30 pm - 4:20 pm Lockett 285
Anton Zeitlin, LSU

Enumerative geometry and quantum integrable systems

Abstract: The miraculous correspondence between 3-dimensional Gauge theory and integrable models based on quantum groups was observed by Nekrasov and Shatashvili in 2009. That discovery led to a lot of interesting developments in mathematics, in particular in enumerative geometry, bringing a new life to older ideas of Givental, and enriching it with flavors of geometric representation theory via the results of Braverman, Maulik, Okounkov and many others. In this talk I will focus on recent breakthroughs, originating from the work of Okounkov on the subject, leading to proper mathematical understanding of Nekrasov-Shatashvili original papers.

Topology Seminar
Seminar website

Posted November 13, 2017

3:30 pm - 4:30 pm Lockett 233
Ivan Levcovitz, CUNY Graduate Center

TBD

Topology Seminar
Seminar website

Posted October 18, 2017

3:30 pm - 4:30 pm Lockett 233
Bulent Tosun, University of Alabama

TBD

Topology Seminar
Seminar website

Posted October 18, 2017

3:30 pm - 4:30 pm
Ina Petkova, Dartmouth College

TBD

Pasquale Porcelli Lecture Series
Special Lecture Series

Posted November 7, 2017

3:30 pm - 4:30 pm tba
Irene Fonseca, Carnegie Mellon University

Porcelli Lecture 1

Topology Seminar
Seminar website

Posted November 12, 2017

3:30 pm - 4:30 pm Lockett 233
Miriam Kuzbary, Rice University

TBD

Pasquale Porcelli Lecture Series
Special Lecture Series

Posted November 7, 2017

2:30 pm - 3:30 pm tba
Irene Fonseca, Carnegie Mellon University

Porcelli Lecture 2

Pasquale Porcelli Lecture Series
Special Lecture Series

Posted November 7, 2017

4:10 pm - 5:00 pm tba
Irene Fonseca, Carnegie Mellon University

Porcelli Lecture 3