The aim of the present paper is to give approximate versions of Hua’s theorem and other related results for Banach algebras and C*-algebras. We also study linear maps approximately preserving the conorm between unital C*-algebras.
"Approximate Preservers on Banach Algebras and C*-Algebras." Abstr. Appl. Anal. 2013 (SI45) 1 - 12, 2013. https://doi.org/10.1155/2013/757646