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Published online by Cambridge University Press: 12 June 2013
Let $p$ be a real number greater than one and let
$\Gamma $ be a graph of bounded degree. We investigate links between the
$p$-harmonic boundary of
$\Gamma $ and the
${D}_{p} $-massive subsets of
$\Gamma $. In particular, if there are
$n$ pairwise disjoint
${D}_{p} $-massive subsets of
$\Gamma $, then the
$p$-harmonic boundary of
$\Gamma $ consists of at least
$n$ elements. We show that the converse of this statement is also true.