Acta Universitatis Sapientiae: Mathematica (Aug 2017)
Some conditions under which derivations are zero on Banach *-algebras
Abstract
Let 𝒜 be a Banach *-algebra. By 𝒮𝒜 we denote the set of all self-adjoint elements of 𝒜 and by 𝒪𝒜 we denote the set of those elements in 𝒜 which can be represented as finite real-linear combinations of mutually orthogonal projections. The main purpose of this paper is to prove the following result:
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