I have some trouble understanding the notion of "smoothly isotopic to the identity". I am working on the following proof: "Any orientation preserving diffeo. $f$ of $\Bbb R^m$ is smoothly isotopic to the identity". I don't understand, what I have to show here. Many thanks for help.
2026-05-15 20:00:53.1778875253
Notion of "smoothly isotopic to the identity"
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