Algebraic structures and linear maps form a cornerstone in modern mathematics, underpinning areas as diverse as abstract algebra and functional analysis. Algebraic structures such as groups, rings, ...

In the first part we show that the decomposition of a bounded selfadjoint linear map from a $C^\ast$-algebra into a given von Neumann algebra as a difference of two ...

Let H be an infinite-dimensional separable complex Hilbert space and ${\cal B}(H)$ the algebra of all bounded linear operators on H. In this paper we characterize ...