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arXiv 1204.4264math.FA
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具有巴拿赫空间域的同构

Diffeomorphisms with Banach space domains

Gaetano Zampieri

摘要:

我们的基本元素是一个$C^1$映射$f:X\to Y$,它具有$X,Y$巴拿赫空间,并且导数处处可逆。所以$f$在每一点上都是一个局部同态。本文的目的是找到$f$是单射的一个充分条件,从而得到整体单同态$X\to f(X)$,以及$f$是双射的一个充分条件,从而得到整体单同态到$Y$ .在特殊情况$X=Y=\R^n$中,最后一个条件也是必要的。在这些定理中,起关键作用的是非负辅助标量强制函数。

英文摘要:

Our basic element is a $C^1$ mapping $f:X\to Y$, with $X,Y$ Banach spaces, and with derivative everywhere invertible. So $f$ is a local diffeomorphism at every point. The aim of this paper is to find a sufficient condition for $f$ to be injective, and so a global diffeomorphism $X\to f(X)$, and a sufficient condition for $f$ to be bijective and so a global diffeomorphism onto $Y$. This last condition is also necessary in the particular case $X=Y=\R^n$. In these theorems the key role is played by nonnegative auxiliary scalar coercive functions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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