lean_workbook_plus_3454
Provedprove that
Preamble
import Mathlib.Analysis.Complex.Basic
Formal statement
theorem lean_workbook_plus_3454 : ∀ x₁ x₂ : ℝ, (1 - x₁) * (1 - x₂) ≥ 1 - x₁ - x₂ + x₁ * x₂ := by sorry
Source
prove that
import Mathlib.Analysis.Complex.Basic
theorem lean_workbook_plus_3454 : ∀ x₁ x₂ : ℝ, (1 - x₁) * (1 - x₂) ≥ 1 - x₁ - x₂ + x₁ * x₂ := by sorry