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def definition def or abbrev

IsEntangling

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formal statement (Lean)

  41def IsEntangling (P : ℝ → ℝ → ℝ) : Prop :=

proof body

Definition body.

  42  ∃ u₀ v₀ u₁ v₁ : ℝ, P u₁ v₁ - P u₁ v₀ - P u₀ v₁ + P u₀ v₀ ≠ 0
  43
  44/-- For smooth P, the cross-derivative at a point. -/

used by (16)

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depends on (3)

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