Achievement of continuity of $(\varphi ,\psi )$-derivations without continuity

S. Hejazian, A. R. Janfada, M. Mirzavaziri +1

Suppose that $\calak$ is a $C^{\ast }$-algebra acting on a Hilbert space $\calhk$, and that $\varphi ,\psi$ are mappings from $\calak$ into $B(\calhk)$ which are not assumed to be necessarily lin…