A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is
In this paper, we show that approximate derivations on Banach * -algebras are exactly derivations and also show that approximate quadratic * -derivations on Banach * -algebras are exactly quadratic * -derivations by the fixed point theorem. MSC: Primary 46S40; 39B52; 47H10; 39B62; 26E50; 47S40 which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license,doi:10.1186/s13662-017-1245-8 fatcat:u5vnjbihpjdfngyvs3ft6qvtlu