Polynomial.Chebyshev.C_two_mul_complex_cosh

∀ (θ : ℂ) (n : ℤ), Polynomial.eval (2 * Complex.cosh θ) (Polynomial.Chebyshev.C ℂ n) = 2 * Complex.cosh (↑n * θ)

The n-th rescaled Chebyshev polynomial of the first kind (Vieta–Lucas polynomial) evaluates on 2 * cosh θ to the value 2 * cosh (n * θ).

Defined in: Mathlib.Analysis.SpecialFunctions.Trigonometric.Chebyshev.Basic
Cited by: 1 results in Mathlib
Foundations: Depth 152 from the axioms · uses propext, Classical.choice, Quot.sound

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