Abstract
We consider various aspects of the following problem: Let T be a positive operator on a Banach lattice such that σ(T)={1}. Does it follow that T≥1?
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Zhang, XD. Some aspects of the spectral theory of positive operators. Acta Appl Math 27, 135–142 (1992). https://doi.org/10.1007/BF00046644
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DOI: https://doi.org/10.1007/BF00046644