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def definition def or abbrev

isNeutralWindow

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formal statement (Lean)

  23def isNeutralWindow (w : Pattern 8) : Prop :=

proof body

Definition body.

  24  ∑ i : Fin 8, (if w i then (1 : ℤ) else (-1 : ℤ)) = 0
  25
  26/-- Eight-tick neutral window implies existence of potential -/

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