Link Span

The span of an unoriented link diagram (also called the link spread) is the difference between the highest and lowest degrees of its bracket polynomial. The span is a topological invariant of a knot. If a knot K has a reduced alternating projection of n crossings, then the span of K is 4n.

See also


Explore with Wolfram|Alpha

Cite this as:

Weisstein, Eric W. "Link Span." From MathWorld--A Wolfram Web Resource.

Subject classifications