在拟Banach代数中同态的稳定性基础上引入了拟同态的概念,研究了Banach代数中与条件 {||f(x1+x2+…+xk)-f(x1)-f(x2)-…-f(xk)||≤θ||x1||^r||x2||^r…||xk||^r, ||f(x1+x2+…+xk)-f(x1)-f(x2)-…-f(xk)||≤θ||x1||^r+||x2||^r+…+||xk||^r,) (r,θ是正实数)相关的Hyers—Ulam—Rassias稳定性问题.
Base of the stability of homorphism in quasi-Banach algebra, the notion of quasi-homomorphism is introduced, and Hyers-Ulam-Rassias stability of quasi-homorphism is investigated in quasi-Banach algebras associated to the following conditions: {||f(x1+x2+…+xk)-f(x1)-f(x2)-…-f(xk)||≤θ||x1||^r||x2||^r…||xk||^r, ||f(x1+x2+…+xk)-f(x1)-f(x2)-…-f(xk)||≤θ||x1||^r+||x2||^r+…+||xk||^r,) where r and s be positive real numbers.