Bikchentaev Airat Midkhatovich
(2018)
We consider a von Neumann algebra $M$ acting on a
Hilbert space $H$. For a positive operator $X$ in $M$ we define the
operator ``intervals'' $I_X=\{Y=Y^*\in M: \; -X \leq Y \leq X \}$ and
$L_X=\{Y \in M: \; |Y| \leq X ...