On the $A$-spectrum for $A$-bounded operator on von-Neumann algebras

H. Baklouti, K. Dhifaoui, M. Mabrouk

Let $\mathfrak{M}$ be a von Neumann algebra and let $A$ be a nonzero positive element of $\mathfrak{M}$. By ${\sigma }_A(T)$ and $r_A(T)$ we denote the $A$-spectrum and the $A$-spectral r…