Liszt - Paganini Etude no.2 S.141 - 2
Báo cáo toán học: "Coloring with no 2-colored P4’s" pdf
... and w with the same color. Now the vertex v between u, w on P 4 is not in C, but since u, w areatdistanceatleast3onC the path uvw together with one of the u, w-segments of C yields a shorter non-contractible ... preliminaries Suppose F is a nonempty family of connected bipartite graphs, each with at least 3 vertices. An r-coloring of a graph G is said to be F-free if G contains no 2-...
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