Here we study the spectral theory of compact operators which leave a convex set invariant in a Banach space. We also obtain a theorem in positive operators by an application of the general minimax ...

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 ...

Given a conjugation C on a separable complex Hilbert space H, a bounded linear operator T on H is said to be C-skew symmetric if CTC = −T*. This paper describes the maps, on the algebra of all bounded ...