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Annular Khovanov-Lee theory of braid closures and braided surfaces

Presented by: 
Eli Grigsby Boston College
Thursday 19th January 2017 - 14:30 to 15:30
INI Seminar Room 1
By endowing the annular Khovanov-Lee complex with the structure of a bifiltered complex, we define a family of annular Rasmussen invariants that gives information both about the positivity of braids viewed as mapping classes and the complexity of braided surfaces bounded by their closures (j. work with T. Licata and S. Wehrli).

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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons