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Crossing Number (Link)

The least number of crossings that occur in any projection of a Link. In general, it is difficult to find the crossing number of a given Link.


Adams, C. C. The Knot Book: An Elementary Introduction to the Mathematical Theory of Knots. New York: W. H. Freeman, pp. 67-69, 1994.

© 1996-9 Eric W. Weisstein