Matrix analysis
Systems & Control Letters
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Any given in×in matrix iA is shown to be a restriction, to the iA-invariant subspace, of a nonnegative iN×iN matrix iB of spectral radius ρ(iB) arbitrarily close to ρ(iA). A difference inclusion x^{k+1}\in\mathbb{A} x^{k}, where \mathbb{A} is a compact set of matrices, is asymptotically stable if and only if \mathbb{A} can be extended to a set \mathbb{B} of nonnegative matrices iB with \|B\|_{1} or \|B\|_{\infty}. Similar results are derived for differential inclusions.