A property of the boundary spectrum of nonnegative operators
The author gives some sufficient conditions for an operator with spectral radius 1 to have spectrum on the boundary of the unit sphere coinciding with natural roots of the unity. Theorems are stated without proofs.
sufficient conditions for an operator with spectral radius 1 to have spectrum on the boundary of the unit sphere coinciding with natural roots of the unity
scientific article; zbMATH DE number 4030305