Let T be a positive operator on a Banach lattice E. Some properties of Weyl essential spectrum σew(T ), in particular, the equality σew(T ) = ⋂ 0≤K∈K(E) σ(T +K), where K(E) is the set of all compact… (More)

Let E be a Banach lattice, T be a bounded operator on E. The Weyl essential spectrum σew(T ) of the operatorT is a setσew(T ) = ∩ K∈K(E) σ(T + K), whereK(E) is a set of all compact operators onE. In… (More)