Let A and B be two unital Banach algebras and ????=A×B. We prove that the bilinear mapping ϕ:????→ℂ is a bi-Jordan homomorphism if and only if ϕ is unital, invertibility preserving and jointly continuous. Additionally, if ???? is commutative, then ϕ is a bi-homomorphism.
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Vol. 36 No. 2 (2022)
Published: 2022-09-30
10.2478/amsil