## Seminars and Colloquia by Series

Wednesday, April 3, 2019 - 15:00 , Location: Skiles 170 , Hongyi Zhou , Georgia Institute of Technology , , Organizer: Surena Hozoori
TBA
Wednesday, April 3, 2019 - 14:20 , Location: Skiles 006 , None , None , Organizer: Sudipta Kolay
Wednesday, March 27, 2019 - 14:00 , Location: Skiles 006 , Monica Flamann , Georgia Tech , Organizer: Sudipta Kolay
Wednesday, February 6, 2019 - 14:00 , Location: Skiles 006 , Surena Hozoori , Georgia Institute of Technology , , Organizer: Surena Hozoori
In this series of (3-5) lectures, I will talk about different aspects of a class of contact 3-manifolds for which geometry, dynamics and topology interact subtly and beautifully. The talks are intended to include short surveys on "compatibility", "Anosovity" and "Conley-Zehnder indices". The goal is to use the theory of Contact Dynamics to show that conformally Anosov contact 3-manifolds (in particular, contact 3-manifolds with negative&nbsp;α-sectional curvature) are universally tight, irreducible and do not admit a Liouville cobordism to the&nbsp;tight 3-sphere.
Wednesday, January 30, 2019 - 14:00 , Location: Skiles 006 , Surena Hozoori , Georgia Institute of Technology , , Organizer: Surena Hozoori
In this series of (3-5) lectures, I will talk about different aspects of a class of contact 3-manifolds for which geometry, dynamics and topology interact subtly and beautifully. The talks are intended to include short surveys on "compatibility", "Anosovity" and "Conley-Zehnder indices". The goal is to use the theory of Contact Dynamics to show that conformally Anosov contact 3-manifolds (in particular, contact 3-manifolds with negative α-sectional curvature) are universally tight, irrducible and do not admit a Liouville cobordism to tight 3-sphere.
Wednesday, January 23, 2019 - 14:00 , Location: Skiles 006 , Surena Hozoori , Georgia Institute of Technology , , Organizer: Surena Hozoori
In this series of (3-5) lectures, I will talk about different aspects of a class of contact 3-manifolds for which geometry, dynamics and topology interact subtly and beautifully. The talks are intended to include short surveys on "compatibility", "Anosovity" and "Conley-Zehnder indices". The goal is to use the theory of Contact Dynamics to show that conformally Anosov contact 3-manifolds (in particular, contact 3-manifolds with negative&nbsp;α-sectional curvature) are universally tight, irrducible and do not admit a Liouville cobordism to tight 3-sphere.
Wednesday, January 16, 2019 - 14:00 , Location: Skiles 006 , Surena Hozoori , Georgia Institute of Technology , , Organizer: Surena Hozoori
In this series of (3-5) lectures, I will talk about different aspects of a class of contact 3-manifolds for which geometry, dynamics and topology interact subtly and beautifully. The talks are intended to include short surveys on "compatibility", "Anosovity" and "Conley-Zehnder indices". The goal is to use the theory of Contact Dynamics to show that conformally Anosov contact 3-manifolds (in particular, contact 3-manifolds with negative $\alpha$-sectional curvature) are universally tight, irrducible and do not admit a Liouville cobordism to tight 3-sphere.
Wednesday, December 5, 2018 - 14:00 , Location: Skiles 006 , Agniva Roy , Georgia Tech , Organizer: Sudipta Kolay
<p>The talk will discuss a paper by Gompf and Miyazaki of the same name. This paper introduces the notion of dualisable patterns, a technique which is widely used in knot theory to produce knots with similar properties. The primary objective of the paper is to first find a knot which is not obviously ribbon, and then show that it is. It then goes on to construct a related knot which is not ribbon. The talk will be aimed at trying to unwrap the basic definitions and techniques used in this paper, without going too much into the heavy technical details.</p>
Wednesday, November 28, 2018 - 14:00 , Location: Skiles 006 , Sidhanth Raman , Georgia Tech , Organizer: Sudipta Kolay
The Archimedes Hatbox Theorem is a wonderful little theorem about the sphere and a circumscribed cylinder having the same surface area, but the sphere can potentially still be characterized by inverting the statement. There shall be a discussion of approaches to prove the claim so far, and a review of a weaker inversion of the Hatbox Theorem by Herbert Knothe and discussion of a related problem in measure theory that would imply the spheres uniqueness in this property.
Wednesday, November 14, 2018 - 14:00 , Location: Skiles 006 , Hyunki Min , Georgia Tech , Organizer: Hyun Ki Min
&nbsp;Unlike symplectic structures in 4-manioflds, contact structures are abundant in 3-dimension. Martinet showed that there exists a contact structure on any closed oriented 3-manifold. After that Lutz showed that there exist a contact structure in each homotopy class of plane fields. In this talk, we will review the theorems of Lutz and Martinet.&nbsp;