Maps preserving two-sided zero products on Banach algebras

M. Brešar, M. L. C. Godoy, A. R. Villena

Let $A$ and $B$ be Banach algebras with bounded approximate identities and let $\Phi :A\to B$ be a surjective continuous linear map which preserves two-sided zero products (i.e., $Φ(a)…