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Multivariable signatures, genus bounds, and 0.5-solvable cobordisms

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Matthias Nagel
McMaster University
Mon, 18/12/2017 - 16:30 - 18:00
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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