It is shown that for any C*-algebra A of operators on a separable Hilbert space H, there is, for each self-adjoint operator x in the strong closure, Ā, of A, a sequence {xn} of self-adjoint operators ...

Operator algebras and functional analysis form a foundational framework in modern mathematics, interlinking abstract algebraic structures with analytic techniques to study infinite‐dimensional ...

Rout et al. [Linear Multilinear Algebra 2020, DOI: 10.1080/03081087.2020.1810201] presented certain 𝔸-numerical radius inequalities for 2 × 2 operator matrices and further results on 𝔸-numerical ...