The Reidemeister move of type I.
Twist Move
See also
Knot Move, Reidemeister MovesExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Twist Move." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/TwistMove.html
The Reidemeister move of type I.
Weisstein, Eric W. "Twist Move." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/TwistMove.html