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  • Semigroups of operators wit...
    B, Janez

    Linear algebra and its applications, 12/2010, Letnik: 433, Številka: 11
    Journal Article

    If S is an irreducible semigroup of complex matrices and if every member of S has nonnegative diagonal entries, then is S simultaneously similar to a semigroup of nonnegative matrices? Partial affirmative answers to this and its infinite-dimensional analogue are given and several counterexamples presented.