General upper bounds on independent k-rainbow domination
General upper bounds on independent k-rainbow domination
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DOI:
10.1016/j.dam.2018.11.018
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发表时间:
2019-04
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影响因子:
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通讯作者:
S. Fujita;M. Furuya;Colton Magnant
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文献类型:
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作者:
S. Fujita;M. Furuya;Colton Magnant
Abstract A function f: V (G)→ 2 [k] is an independent k-rainbow dominating function of a graph G if {x∣ f (x)≠ 0̸} is an independent set of G and for every vertex x with f (x)= 0̸, we have⋃ y∈ N G (x) f (y)=[k]. The independent k-rainbow domination number of G, denoted i r k (G), is the minimum, over all independent k-rainbow dominating functions f,∑ x∈ V (G)| f (x)|. We provide sharp upper bounds on i r k (G) when G is a connected bipartite graph and when G is any graph. In both cases, we also classify those graphs that achieve the bounds.