Abstract:
It is proved that the index of imprimitivity of a semigroup of nonnegative block-monominal matrices free of zero rows decomposes into a sum of the indices of imprimitivity of its temporal components, and if the semigroup is block irreducible, then the indices of imprimitivity of all the temporal components are equal.
Key words and phrases:irreducible nonnegative matrix, Frobenius form, imprimitivity index.