Theorems · Theorem · real analysis

DifferentiableWithinAt.fun_finsetProd

∀ {𝕜 : Type u} [inst : NontriviallyNormedField 𝕜] {x : 𝕜} {s : Set 𝕜} {ι : Type u_2} {𝔸' : Type u_3}
  [inst_1 : NormedCommRing 𝔸'] [inst_2 : NormedAlgebra 𝕜 𝔸'] {u : Finset ι} {f : ι → 𝕜 → 𝔸'},
  (∀ i ∈ u, DifferentiableWithinAt 𝕜 (f i) s x) → DifferentiableWithinAt 𝕜 (fun x => ∏ i ∈ u, f i x) s x

Defined in

Mathlib.Analysis.Calculus.Deriv.Mul

Cited by

3 results in Mathlib

Foundations

Depth 189 from the axioms · uses propext, Classical.choice, Quot.sound

Assumes

NontriviallyNormedFieldNormedCommRingNormedAlgebra