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单词 Trefoil Knot
释义

Trefoil Knot

The knot 03-001, also called the Threefoil Knot, which is the unique Prime Knot of threecrossings. It has Braid Word . The trefoil and its Mirror Image are not equivalent. Thetrefoil has Alexander Polynomial and is a (3, 2)-Torus Knot. The Bracket Polynomial can becomputed as follows.

 
  
  

Plugging in
 
 

gives


The normalized one-variable Kauffman Polynomial X is then given by
 
  

where the Writhe . The Jones Polynomial is therefore


Since , we have shown that the mirror images are not equivalent.


References

Claremont High School. ``Trefoil_Knot Movie.'' Binary encoded QuickTime movie. ftp://chs.cusd.claremont.edu/pub/knot/trefoil.cpt.bin.

Crandall, R. E. Mathematica for the Sciences. Redwood City, CA: Addison-Wesley, 1993.

Kauffman, L. H. Knots and Physics. Singapore: World Scientific, pp. 29-35, 1991.

Nordstrand, T. ``Threefoil Knot.'' http://www.uib.no/people/nfytn/tknottxt.htm.

Pappas, T. ``The Trefoil Knot.'' The Joy of Mathematics. San Carlos, CA: Wide World Publ./Tetra, p. 96, 1989.


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