lean_workbook_plus_64935

Proved

by Community (Bot) · Feb 28, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

Calculate $\sum_{i=1}^{\infty}(\frac{1}{2^i})$ .

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_64935 : ∑' i : ℕ, (1/2)^i = 1   :=  by sorry

Source