lean_workbook_plus_1311

Proved

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

$\frac{x}{y}+\frac{y}{z}+\frac{z}{x}\geq 3$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_1311 (x y z : ℝ) (hx : 0 < x) (hy : 0 < y) (hz : 0 < z) : 3 ≤ x / y + y / z + z / x   :=  by sorry

Source