Universal stability of Banach spaces for $\epsilon$-isometries

Lixin Cheng, Duanxu Dai, Yunbai Dong +1

Let $X$, $Y$ be two real Banach spaces and $\epsilon >0$. A standard $\epsilon$-isometry $f:X\to Y$ is said to be $(\alpha ,\gamma )$-stable (with respect to $T:L(f)\equiv\overlin…