Suppose to have a diffeomorphism $\phi$ of the d-dimensional torus to itself, and suppose to lift it to a morphism of $\mathbb{R}^d$ to itself. I have proved that is still invertible. How i proof that it's still differetiable. How the Jacobian of two diffeomorphsim are related?
2026-04-29 14:19:38.1777472378
Lifted Diffeomorphism
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