On a tensor-analogue of the Schur product

K. Sumesh, V. S. Sunder

We consider the tensorial Schur product $R{\circ }^{\otimes }S=[r_{ij}\otimes s_{ij}]$ for $R\in M_n(\mathcal{A}),S\in M_n(\mathcal{B}),$ with $\mathcal{A},\mathcal{B}$ unital $C…