On the sigma chromatic number of the join of a finite number of paths and cycles
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DOI: 10.1142/s1793557121500194
Abstract: Let G be a simple connected graph and c : V (G) → ℕ a coloring of the vertices in G. For any v ∈ V (G), let σ(v) be the sum of colors of… read more here.
Keywords: sigma chromatic; finite number; join finite; number ... See more keywords
Sigma chromatic number of the middle graph of some general families of trees of height 2
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DOI: 10.1142/s1793557123501437
Abstract: Let [Formula: see text] be a nontrivial connected graph and let [Formula: see text] be a vertex coloring of [Formula: see text] where adjacent vertices may have the same color. For a vertex [Formula: see… read more here.
Keywords: chromatic number; sigma chromatic; see text; formula see ... See more keywords