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Lenhard Ng : Cotangent bundles and applying symplectic techniques to topology

I'll discuss how one can use cotangent and conormal bundles to translate some basic questions in topology into questions in symplectic geometry. This symplectic viewpoint allows one, for instance, to (re)prove that certain smooth structures on spheres are exotic, and to define new knot invariants via holomorphic curves. I'll describe properties of the knot invariant and some recent applications to transverse knots in contact geometry.

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