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structure definition def or abbrev

ClassicalZeroFreeRegionAttackSurface

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formal statement (Lean)

  88structure ClassicalZeroFreeRegionAttackSurface where
  89  trig_kernel_nonneg :
  90    ∀ θ : ℝ, 0 ≤ 3 + 4 * Real.cos θ + Real.cos (2 * θ)
  91  open_deLaValleePoussin :
  92    DeLaValleePoussinZeroFreeRegion → StripZeroFreeBridge
  93

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