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def definition def or abbrev

partialSum

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formal statement (Lean)

  23noncomputable def partialSum (n : ℕ) : ℝ :=

proof body

Definition body.

  24  (Finset.range n).sum (fun i => coeff i)
  25
  26/-- Generating functional F(z) := log(1 + z/φ).  -/

depends on (4)

Lean names referenced from this declaration's body.