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def definition def or abbrev

partialDeriv

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formal statement (Lean)

  82noncomputable def partialDeriv {M : Manifold} (f : Point M → ℝ) (μ : Fin M.dim) (x : Point M) : ℝ :=

proof body

Definition body.

  83  deriv (fun t => f (fun i => if i = μ then x i + t else x i)) 0
  84
  85
  86end Geometry
  87end Relativity
  88end IndisputableMonolith

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