English
Monotonicity of the local invariant property under nhds inclusion.
Русский
Гладкость локальной инвариантности сохраняется при включении множеств внутрь окрестностей.
LaTeX
$$$ (nhdsWithin x t) \ni s \Rightarrow (h : ContDiffWithinAtProp I I' n f s x) \Rightarrow (ContDiffWithinAtProp I I' n f t x) $$$
Lean4
/-- Being `Cⁿ` in the model space is a local property, invariant under `C^n` maps. Therefore,
it lifts nicely to manifolds. -/
theorem contDiffWithinAt_localInvariantProp (n : WithTop ℕ∞) :
(contDiffGroupoid n I).LocalInvariantProp (contDiffGroupoid n I') (ContDiffWithinAtProp I I' n) :=
contDiffWithinAt_localInvariantProp_of_le n n le_rfl