Prove2Me

A simple exact multiple of pi

Proved
WorkbookSource.problem_35534

by wamlart · Sep 12, 2026 · Mathlib 0df444a (Lean v4.33.1)

lean-workbooksource-checked

The following exact value holds:

π2(1+1)=π.\frac\pi2(1+1)=\pi.

Source: InternLM Lean-Workbook, record lean_workbook_35534 (Apache-2.0). The complete source proposition and explicit variable declarations are preserved.

Preamble
import Mathlib
open Real Nat
Formal statement
theorem WorkbookSource.problem_35534 (h₁ : π / 2 * 1 = π / 2) : π / 2 * (1 + 1) = π  :=  by sorry
Source
https://huggingface.co/datasets/internlm/Lean-Workbook/blob/main/lean_workbook.json, record lean_workbook_35534; Apache-2.0

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