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1. What Is Knot Theory? Why Is It In Mathematics?
www.sci.osaka-cu.ac.jp3 Figure 4：A 3-braid Figure 5： AWABI MUSUBI(=abalone knot) of "MIZUHIKI" Example 3：Assume that there are n particles moving without colliding in the plane with a time parameter. Then the track of the motion forms an n-braid in the three-dimensional space which is …