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Homotopy invariance in string topology

Presented by: 
Nathalie Wahl University of Copenhagen
Date: 
Tuesday 4th December 2018 - 16:00 to 17:00
Venue: 
INI Seminar Room 1
Abstract: 
In joint work with Nancy Hingston, we show that the Goresky-Hingston coproduct, just like the Chas-Sullivan product, is homotopy invariant. Unlike the Chas-Sullivan product, this coproduct is a "compactified operation", coming from a certain compactification of the moduli space of Riemann surfaces. I'll give an idea of the ingredients used in the proof.
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University of Cambridge Research Councils UK
    Clay Mathematics Institute London Mathematical Society NM Rothschild and Sons