定光桂
Ding Guanggui
摘要:
If T is an isomorphism of (c0) into C(\Omega) (where \Omega is a sequentially compact and paracompact space, or a compact metric space in particular), which satisfies the condition ||T||●||T-1||≤1+ε for some ε∈ (0, 1/5), then T /||T|| is close to an isometry with an error less than 9ε. The proof of this article is simple without using the dual space or adjoint operator.
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