Completely positive matrices of order 55 with CP^\widehat{CP}-graph

Authors
Publication date
20 April 2016
Publisher
Coordinamento SIBA - Università del Salento

Abstract

We characterize completely positive matrices of order five whose associated graph is a CP^\widehat{CP}-graph not completely positive, unifying and improving results obtained by Xu. We show by counterexamples that two characterizations obtained by Xu are incorrec

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