Linear operators form the cornerstone of analysis in Banach spaces, offering a framework in which one can rigorously study continuity, spectral properties and stability. Banach space theory, with its ...

Let Ω ⊂ ℝp, p ϵ ℕ* be a nonempty subset and B(Ω) be the Branch lattice of all bounded real functions on a Ω, equipped with sup norm. Let 𝑋 ⊂ 𝐵(Ω) be a linear sublattice of 𝐵(Ω) and 𝐴: 𝑋 → 𝑋 be a ...

AbstractLet M C =( A C 0 B )∈B(χ⊕χ) be an upper triangulat Banach space operator. The relationship between the spectra of 𝑀𝐶 and 𝑀₀, and their various distinguished parts, has been studied by a ...