Crossing number

Crossing number

Crossing number may refer to:


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  • Crossing number (graph theory) — A drawing of the Heawood graph with three crossings. This is the minimum number of crossings among all drawings of this graph, so the graph has crossing number cr(G) = 3. In graph theory, the crossing number cr(G) of a graph G is the… …   Wikipedia

  • Crossing number (knot theory) — In the mathematical area of knot theory, the crossing number of a knot is the minimal number of crossings of any diagram of the knot. It is a knot invariant. By way of example, the unknot has crossing number zero, the trefoil knot three and the… …   Wikipedia

  • crossing number — noun The minimum, taken over all planar representations of a link or graph, of the number of times it crosses itself …   Wiktionary

  • Average crossing number — In the mathematical subject of knot theory, the average crossing number of a knot is the result of averaging over all directions the number of crossings in a knot diagram of the knot obtained by projection onto the plane orthogonal to the… …   Wikipedia

  • Crossing the Chasm (book) — Crossing the Chasm   Book Cover …   Wikipedia

  • Crossing of the Andes — Part of the Spanish American wars of independence …   Wikipedia

  • Crossing the River —   First American edition cover …   Wikipedia

  • Crossing Midnight — Publication information Publisher Vertigo …   Wikipedia

  • Crossing of the Düna — Part of the Great Northern War Swedish Army crossing the Düna …   Wikipedia

  • Crossing the Red Sea with The Adverts — Studio album by The Adverts …   Wikipedia

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