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Reverse Lagrangian surgery on fillings

Geometry/topology Seminar
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Monday, November 02, 2020
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3:15 pm - 4:15 pm
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Yu Pan
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Geometry/topology Seminar

For an immersed filling of a topological knot, one can do surgery to resolve a double point with the price of increasing surface genus by 1. In the Lagrangian analog, one can do Lagrangian surgery on immersed Lagrangian fillings to treat a double point by a genus. In this talk, we will explore the possibility of reversing the Lagrangian surgery, i.e., compressing a genus into a double point. It turns out that not all Lagrangian surgery are reversible.

Contact Lenhard Ng for zoom link.

Contact: Lenhard Ng