A characterisation of 33-Jordan homomorphisms on Banach algebras

DOI: 10.1017/S000497271500105

Almost Jordan homomorphisms on Fréchet algebras

In this paper we study the notation of almost Jordan homomorphism between Fréchet algebras. We show that if (A; (pn)) is a Fréchet algebra and T : A → ℂ is a almost Jordan homomorphism, then either T is homomorphism, or it is continuous. Moreover, we prove that every almost Jordan homomorphism between two commutative Fréchet algebras A and B is a almost homomorphism. We also investigate automatic continuity of almost Jordan homomorphism between Fréchet Q-algebras. Mathematics Subject Classification (2010): 46H40, 47A10