Characterizations of linear mappings through zero products or zero Jordan products

摘要

Let $mathcal{A}$ be a unital algebra and $mathcal{M}$ be a unital $mathcal{A}$-bimodule. A characterization of generalized derivations and generalized Jordan derivations from $mathcal{A}$ into $mathcal{M}$, through zero products or zero Jordan products, is given. Suppose that $mathcal{M}$ is a unital left $mathcal{A}$-module. It is investigated when a linear mapping from $mathcal{A}$ into $mathcal{M}$ is a Jordan left derivation under certain conditions. It is also studied whether an algebra with a nontrivial idempotent is zero Jordan product determined, and Jordan homomorphisms, Lie homomorphisms and Lie derivations on zero Jordan product determined algebras are characterized.