Homotopy invariance in string topology – Nathalie Wahl (University of Copenhagen)

When:
December 4, 2018 @ 4:00 pm – 5:00 pm
2018-12-04T16:00:00+00:00
2018-12-04T17:00:00+00:00
Where:
Seminar Room 1
Newton Institute
Contact:

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.