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lemma proved term proof

phi_differentiable

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formal statement (Lean)

 105private lemma phi_differentiable (H : ℝ → ℝ) (h_cont : Continuous H) :
 106    Differentiable ℝ (Phi H) :=

proof body

Term-mode proof.

 107  fun t => (phi_hasDerivAt H h_cont t).differentiableAt
 108

used by (5)

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depends on (7)

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