Extensions of Perron–Frobenius theory

Abstract

The classical Perron–Frobenius theory asserts that, for two matrices $$A$$ and $$B$$ , if $$0\le B \le A$$ and $$r(A)=r(B)$$ with $$A$$ being irreducible, then $$A=B$$ . It has been extended to infinite-dimensional Banach lattices under certain additional conditions, including that $$r(A)$$ is a pole of the resolvent of $$A$$ . In this paper, we prove that the same result holds if $$B$$ is irreducible and $$r(B)$$ is a pole of the resolvent for $$B$$ . We also prove some other interesting extensions of the theorem for infinite-dimensional Banach lattices.