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. Knots and links are generally tabulated based on their crossing numbers.
Link Crossing Number
See also
Knot, LinkExplore with Wolfram|Alpha
References
Adams, C. C. The Knot Book: An Elementary Introduction to the Mathematical Theory of Knots. New York: W. H. Freeman, pp. 67-69, 1994.Hoste, J.; Thistlethwaite, M.; and Weeks, J. "The First
Knots." Math. Intell. 20, 33-48,
Fall 1998.Referenced on Wolfram|Alpha
Link Crossing NumberCite this as:
Weisstein, Eric W. "Link Crossing Number." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/LinkCrossingNumber.html