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.
Links:
[1] http://www.mpim-bonn.mpg.de/de/taxonomy/term/39
[2] http://www.mpim-bonn.mpg.de/de/node/3444
[3] http://www.mpim-bonn.mpg.de/de/TopologySeminar