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On g c -colorings of nearly bipartite graphs

Yuzhuo ZhangXia Zhang — 2018

Czechoslovak Mathematical Journal

Let G be a simple graph, let d ( v ) denote the degree of a vertex v and let g be a nonnegative integer function on V ( G ) with 0 g ( v ) d ( v ) for each vertex v V ( G ) . A g c -coloring of G is an edge coloring such that for each vertex v V ( G ) and each color c , there are at least g ( v ) edges colored c incident with v . The g c -chromatic index of G , denoted by χ g c ' ( G ) , is the maximum number of colors such that a g c -coloring of G exists. Any simple graph G has the g c -chromatic index equal to δ g ( G ) or δ g ( G ) - 1 , where δ g ( G ) = min v V ( G ) d ( v ) / g ( v ) . A graph G is nearly bipartite, if G is not...

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