Seminars and Colloquia by Series

Friday, February 22, 2013 - 11:30 , Location: Skiles 006 , John Etnyre , Ga Tech , Organizer: John Etnyre
In this series of talks I will begin by discussing the idea of studying smooth manifolds and their submanifolds using the symplectic (and contact) geometry of their cotangent bundles. I will then discuss Legendrian contact homology, a powerful invariant of Legendrian submanifolds of contact manifolds. After discussing the theory of contact homology, examples and useful computational techniques, I will combine this with the conormal discussion to define Knot Contact Homology and discuss its many wonders properties and conjectures concerning its connection to other invariants of knots in S^3.  
Friday, February 15, 2013 - 11:30 , Location: Skiles 006 , John Etnyre , Ga Tech , Organizer: John Etnyre
In this series of talks I will begin by discussing the idea of studying smooth manifolds and their submanifolds using the symplectic (and contact) geometry of their cotangent bundles. I will then discuss Legendrian contact homology, a powerful invariant of Legendrian submanifolds of contact manifolds. After discussing the theory of contact homology, examples and useful computational techniques, I will combine this with the conormal discussion to define Knot Contact Homology and discuss its many wonders properties and conjectures concerning its connection to other invariants of knots in S^3.  
Friday, February 8, 2013 - 11:30 , Location: Skiles 006 , John Etnyre , Ga Tech , Organizer: John Etnyre
In this series of talks I will begin by discussing the idea of studying smooth manifolds and their submanifolds using the symplectic (and contact) geometry of their cotangent bundles. I will then discuss Legendrian contact homology, a powerful invariant of Legendrian submanifolds of contact manifolds. After discussing the theory of contact homology, examples and useful computational techniques, I will combine this with the conormal discussion to define Knot Contact Homology and discuss its many wonders properties and conjectures concerning its connection to other invariants of knots in S^3.  
Friday, February 1, 2013 - 11:30 , Location: Skiles 006 , John Etnyre , Ga Tech , Organizer: John Etnyre
In this series of talks I will begin by discussing the idea of studying smooth manifolds and their submanifolds using the symplectic (and contact) geometry of their cotangent bundles. I will then discuss Legendrian contact homology, a powerful invariant of Legendrian submanifolds of contact manifolds. After discussing the theory of contact homology, examples and useful computational techniques, I will combine this with the conormal discussion to define Knot Contact Homology and discuss its many wonders properties and conjectures concerning its connection to other invariants of knots in S^3.  
Friday, January 25, 2013 - 11:30 , Location: Skiles 006 , John Etnyre , Ga Tech , Organizer: John Etnyre
In this series of talks I will begin by discussing the idea of studying smooth manifolds and their submanifolds using the symplectic (and contact) geometry of their cotangent bundles. I will then discuss Legendrian contact homology, a powerful invariant of Legendrian submanifolds of contact manifolds. After discussing the theory of contact homology, examples and useful computational techniques, I will combine this with the conormal discussion to define Knot Contact Homology and discuss its many wonders properties and conjectures concerning its connection to other invariants of knots in S^3.  
Friday, January 18, 2013 - 11:30 , Location: Skiles 006 , John Etnyre , Ga Tech , Organizer: John Etnyre

This is the first of 4 or 5, 1.5 hour talks. 

In this series of talks I will begin by discussing the idea of studying smooth manifolds and their submanifolds using the symplectic (and contact) geometry of their cotangent bundles. I will then discuss Legendrian contact homology, a powerful invariant of Legendrian submanifolds of contact manifolds. After discussing the theory of contact homology, examples and useful computational techniques, I will combine this with the conormal discussion to define Knot Contact Homology and discuss its many wonders properties and conjectures concerning its connection to other invariants of knots in S^3.  
Friday, November 2, 2012 - 13:00 , Location: Skiles 006 , Various , Ga Tech , Organizer: John Etnyre
Friday, October 5, 2012 - 13:05 , Location: Skiles 006 , Igor Belegradek , Georgia Tech , Organizer: Igor Belegradek
The talk will be about manifolds covered by the Euclidean space yet admitting no complete metric of nonpositive curvature.
Friday, September 21, 2012 - 13:05 , Location: Skiles 006 , Mohammad Ghomi , Georgia Tech , ghomi@math.gatech.edu , Organizer: Mohammad Ghomi
A well-known problem in discerte convex geometry, attributed to the Dutch painter Durrer and first formulated by G. C. Shephard, is concerned with whether every convex polyope P in Euclidean 3-space has a simpe net, i.e., whether the surface of P can be isometrically embedded in the Euclidean plane after it has been cut along some spanning tree of its edges. In this talk we show that the answer is yes after an affine transformation. In particular the combinatorial structure of P plays no role in deciding its unfoldability, which settles a question of Croft, Falconer, and Guy. The proof employs a topological lemma which provides a criterion for checking embeddedness of immersed disks.
Friday, September 14, 2012 - 13:05 , Location: Skiles 006 , Dan Margalit , GaTech , Organizer: Dan Margalit
We will introduce characteristic classes of surface bundles over surfaces.  This will be a slower version of a talk I gave over the summer.  The goal is to get to some of the recent papers on the subject.

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