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Noter til Geometri 1

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Definition 7.6. En afbildning F : W → V mellem ˚abne mængder V,W ⊆<br />

R n kaldes en diffeomorfi, hvis F er bijektiv, og b˚ade F og F −1 har klasse<br />

C ∞ .<br />

Med denne sprogbrug siger addendum 7.5, at hvis F har klasse C ∞ og<br />

DFu0 er invertibel, s˚a erF en lokal diffeomorfi.<br />

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