Mathematical Physics: Classical Mechanics
《Mathematical Physics: Classical Mechanics》 · 第 3 页 · Chapter 1，三类 Reidemeister moves 的说明及 Figure 1.3 原图
The Reidemeister moves are of three types, shown below in Figure 1.3; each replaces a simple configuration of arcs and crossings in a disc by another configuration. A move of Type I inserts or deletes a “kink” in the diagram; moves of Type III preserve the number of crossings.