Event Series
Event Type
Seminar
Tuesday, April 20, 2021 10:00 AM
Brendan Owens (University of Glasgow)

I will describe joint work with Frank Swenton resulting in a highly successful but still imperfect method of finding ribbon disks for alternating knots.  The mathematical underpinning is Donaldson’s diagonalisation theorem.  I will explain and generalise the obstruction this gives for an alternating knot to be slice.  I will also explain the steps that our algorithm performs, and exhibit some nice examples.

Zoom