Abstract
The simplest potential counterexample to Y. Nakanishi's, 20 year old, conjecture that the 4-move is an unknotting operation is unknotted using 4-moves (Problem 1.59, 3a in the Kirby Problem List) thus showing it to not be one.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have