Induced Stinespring factorization and the Wittstock support theorem

J. E. Pascoe, Ryan Tully-Doyle

Given a pair of self-adjoint-preserving completely bounded maps on the same $C^{\ast }$-algebra, say that $\phi \le \psi$ if the kernel of $\phi$ is a subset of the kernel of $\psi$ and $ψ\circ φ^{-…