56 citations · 277 across the 50 of their papers we have counts for
Showing 2014 · math.GTShow all
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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
A specious unlinking strategy
Stefan Friedl, Matthias Nagel, Mark Powell
We show that the following unlinking strategy does not always yield an optimal sequence of crossing changes: first split the link with the minimal number of crossing changes, and t…
math.GT2014★ 5 cited
Blanchfield forms and Gordian distance
Maciej Borodzik, Stefan Friedl, Mark Powell
Given a link in we will use invariants derived from the Alexander module and the Blanchfield pairing to obtain lower bounds on the Gordian distance between links, the unlinki…