The Gordian complexes of knots given by 4-move
Abstract
The Gordian complex of knots is a simplicial complex whose vertices consist of all knot types in 𝕊3. Local moves play an important role in defining knot invariants. There are many local moves known as unknotting operations for knots. In this paper, we discuss the 4-move operation. We show that for any knot K0 and for any given natural number n, there exists a family of knots {K0,K1,…,Kn} such that for any pair (Ki,Kj) of distinct elements of the family, the Gordian distance of knots by 4-move is df(Ki,Kj)=1. We also show the existence of an arbitrarily high dimensional simplex in the Gordian complexes.