# Michael Henry : Connections between existing Legendrian knot invariants

In this talk, we will investigate existing Legendrian knot invariants and discuss new connections between the theory of generating families and the Chekanov-Eliashberg differential graded algebra (CE-DGA). The geometric origins of the CE-DGA are Floer theoretic in nature and come out of the Symplectic Field Theory developed by Eliashberg and Hofer. On the other hand, Legendrian invariants derived from the study of 1-parameter families of smooth functions (called generating families) are Morse theoretic in nature. In the last decade, connections have been found between the Legendrian invariants derived using these two methods. In this talk, I will try to provide a clearer picture of the relationship between generating families and the CE-DGA.

**Category**: Geometry and Topology**Duration**: 01:34:38**Date**: April 6, 2010 at 4:25 PM**Views**: 141-
**Tags:**seminar, Geometry/topology Seminar

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