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Theorems · Theorem · complex analysis

Differentiable.apply_le_of_iteratedDeriv_alternating

∀ {f : ℂ → ℂ} {c : ℂ},
  Differentiable ℂ f → (∀ (n : ℕ), n ≠ 0 → 0 ≤ (-1) ^ n * iteratedDeriv n f c) → ∀ ⦃z : ℂ⦄, z ≤ c → f c ≤ f z

An entire function whose iterated derivatives at c are all real with alternating signs (except possibly the value itself) has values of the form f c + nonneg. real along the set c - ℝ≥0.

Defined in
Mathlib.Analysis.Complex.Positivity
Cited by
1 results in Mathlib
Foundations
Depth 291 from the axioms · uses propext, Classical.choice, Quot.sound

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