Reidemeister move
(重定向自Reidemeister moves)




In the mathematical area of knot theory, a Reidemeister move is any of three local moves on a link diagram. Reidemeister (1927) and, independently, Alexander & Briggs (1926), demonstrated that two knot diagrams belonging to the same knot, up to planar isotopy, can be related by a sequence of the three Reidemeister moves.