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The rainbow connection number of the power graph of a finite group

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arxiv 1412.5849 v2 pith:JDJCLPRO submitted 2014-12-18 math.CO

The rainbow connection number of the power graph of a finite group

classification math.CO
keywords connectionrainbownumbergammapowerfinitegraphgroup
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

This paper studies the rainbow connection number of the power graph $\Gamma_G$ of a finite group $G$. We determine the rainbow connection number of $\Gamma_G$ if $G$ has maximal involutions or is nilpotent, and show that the rainbow connection number of $\Gamma_G$ is at most three if $G$ has no maximal involutions. The rainbow connection numbers of power graphs of some nonnilpotent groups are also given.

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