fderiv_def — Mathlib

English

The tsupport of the derivative is contained in the tsupport of f: tsupport(fderiv 𝕜 f) ⊆ tsupport f.

Русский

Опора производной находится внутри опоры функции: tsupport(fderiv 𝕜 f) ⊆ tsupport f.

LaTeX

$$$tsupport(fderiv 𝕜 f) \subseteq tsupport(f)$$$

Lean4

theorem fderiv_def : eta_helper Eq✝ @fderiv.{} @(delta% @definition✝) :=
  by
  intros
  delta fderiv
  rw [show wrapped✝ = ⟨@definition✝.{}, rfl✝⟩ from Subtype.ext✝ wrapped✝.2.symm✝]
  rfl

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