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def definition def or abbrev

zAtStep

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formal statement (Lean)

  38def zAtStep (seq : TemporalSequence) (k : Fin seq.n_steps) : ℝ :=

proof body

Definition body.

  39  (Finset.univ.filter (fun i : Fin seq.n_steps => i.val ≤ k.val)).sum
  40    (fun i => |seq.berry_at_step i|)
  41
  42/-- Z is non-negative at every step. -/

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