OAI/GroupTheory/PolycyclicRecognition/Geometry/SmoothFaithfulRepresentation.lean

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Testing smoothness in faithful group coordinates

An injective differential at the identity suffices to test smoothness: translate to the identity and apply local chart cancellation.

  1. theorem OAI.PolycyclicRecognition.contMDiffAt_of_unitsHom_injective_differential line 25