Displaying similar documents to “Half-simple symmetric Venn diagrams.”

Trees and matchings.

Kenyon, Richard W., Propp, James G., Wilson, David B. (2000)

The Electronic Journal of Combinatorics [electronic only]

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On the Crossing Numbers of Cartesian Products of Stars and Graphs of Order Six

Marián Klešč, Štefan Schrötter (2013)

Discussiones Mathematicae Graph Theory

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The crossing number cr(G) of a graph G is the minimal number of crossings over all drawings of G in the plane. According to their special structure, the class of Cartesian products of two graphs is one of few graph classes for which some exact values of crossing numbers were obtained. The crossing numbers of Cartesian products of paths, cycles or stars with all graphs of order at most four are known. Moreover, except of six graphs, the crossing numbers of Cartesian products G⃞K1,n for...