Completely bounded norms of right module maps

Rupert H. Levene, Richard M. Timoney

It is well-known that if T is a D_m-D_n bimodule map on the m by n complex matrices, then T is a Schur multiplier and $\Vert T{\Vert }_{cb}=\Vert T\Vert$. If n=2 and T is merely assumed to be a rig…