$C^{\ast }$-Algebraic Covariant Structures

H. Bustos, M. Mantoiu

We introduce {\it covariant structures} $\left\{(\A,\k),(\a,å),\(\ha,\haa\)\right\}$ formed of a separable $C^{\ast }$-algebra $\A$, a measurable twisted action $(\a,å)$ of the second-co…