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math.GT2014
Casson towers and slice links
Jae Choon Cha, Mark Powell
We prove that a Casson tower of height 4 contains a flat embedded disc bounded by the attaching circle, and we prove disc embedding results for height 2 and 3 Casson towers which a…
math.GT2014★ 5 cited
A topological approach to Cheeger-Gromov universal bounds for von Neumann rho-invariants
Jae Choon Cha
Using deep analytic methods, Cheeger and Gromov showed that for any smooth (4k-1)-manifold there is a universal bound for the von Neumann -invariants associated to arbitra…