Bridge Index

A numerical knot invariant. For a tame knot K, the bridge index is the least bridge number of all planar representations of the knot. The bridge index of the unknot is defined as 1.

See also

Bridge Number, Crookedness

Explore with Wolfram|Alpha


Rolfsen, D. Knots and Links. Wilmington, DE: Publish or Perish Press, p. 114, 1976.Schubert, H. "Über eine numerische Knotteninvariante." Math. Z. 61, 245-288, 1954.

Referenced on Wolfram|Alpha

Bridge Index

Cite this as:

Weisstein, Eric W. "Bridge Index." From MathWorld--A Wolfram Web Resource.

Subject classifications