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def definition def or abbrev

IsConservedAlong

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formal statement (Lean)

  74def IsConservedAlong {X : Type*} (Q : X → ℝ) (φ : ℝ → X → X) : Prop :=

proof body

Definition body.

  75  ∀ (x : X) (t₁ t₂ : ℝ), Q (φ t₁ x) = Q (φ t₂ x)
  76
  77/-- Alternative: Q is conserved if Q ∘ φ t = Q for all t. -/

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