lean_workbook_plus_74781

Disproved

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

Prove that for $n=2$ , $(1 - x_1)(1 - x_2) \geq 1 - (x_1 + x_2)$ .

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_74781 : ∀ x1 x2 : ℝ, (1 - x1) * (1 - x2) ≥ 1 - (x1 + x2)   :=  by sorry

Source