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Multivariable signatures, genus bounds, and 0.5-solvable cobordisms

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Speaker: 
Matthias Nagel
Affiliation: 
McMaster University
Date: 
Mon, 2017-12-18 16:30 - 18:00
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

We cast the multivariable link signature as a signature defect, and explain how
it gives rise to genus bounds for link cobordisms. Then we discuss invariance
of the multivariable signature under 0.5-solvable cobordisms.
This is joint work with Anthony Conway, and Enrico Toffoli.

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