Spectrum of Weighted Composition Operators Part VI Essential spectra of d-endomorphisms of Banach C(K)-modules

We investigate properties of essential spectra of disjointness preserving operators acting on Banach C(K)-modules. In particular, we prove that under some very mild conditions the upper semi-Fredholm spectrum of such an operator is rotation invariant. In the last part of the paper we provide a full description of the spectrum... Show more