Theorems · Theorem · real analysis

ContDiffWithinAt.prodMk

∀ {𝕜 : Type u_1} {E : Type u_2} {F : Type u_3} {G : Type u_4} [inst : NontriviallyNormedField 𝕜]
  [inst_1 : NormedAddCommGroup E] [inst_2 : NormedSpace 𝕜 E] [inst_3 : NormedAddCommGroup F] [inst_4 : NormedSpace 𝕜 F]
  [inst_5 : NormedAddCommGroup G] [inst_6 : NormedSpace 𝕜 G] {x : E} {n : WithTop ℕ∞} {s : Set E} {f : E → F}
  {g : E → G}, ContDiffWithinAt 𝕜 n f s x → ContDiffWithinAt 𝕜 n g s x → ContDiffWithinAt 𝕜 n (fun x => (f x, g x)) s x

The Cartesian product of C^n functions at a point in a domain is C^n.

Defined in

Mathlib.Analysis.Calculus.ContDiff.Basic

Cited by

17 results in Mathlib

Foundations

Depth 187 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

NontriviallyNormedFieldNormedAddCommGroupNormedSpaceNormedAddCommGroupNormedSpaceNormedAddCommGroupNormedSpace