Definition 33.1.4 (Unital Homomorphism).label Let $A, B$ be unital Banach algebras and $\phi: A \to B$ be a homomorphism, then $\phi$ is a unital homomorphism if $\phi(1) = 1$.
Definition 33.1.4 (Unital Homomorphism).label Let $A, B$ be unital Banach algebras and $\phi: A \to B$ be a homomorphism, then $\phi$ is a unital homomorphism if $\phi(1) = 1$.
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