lean_workbook_plus_25957

Open

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

We have $sin{\frac{\pi}{11}} \ne 0$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_25957 : Real.sin (π / 11) ≠ 0   :=  by sorry

Source