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Algebra/Topology Seminar – JungHwan Park (Georgia Institute of Technology)
October 14, 2020 @ 11:00 am - 12:30 pm
Title: On rationally slice knots
Abstract: A knot in the three-sphere is called slice if it bounds a smooth disk in the four-ball.
If one only requires the disk to be in a rational homology four-ball, then we say that the knot is rationally slice. We present a rationally slice knot which is not slice even after its connected self-sum. This is joint work with Jennifer Hom, Sungkyung Kang, and Matthew Stoffregen.