Prove2Me

Rational arithmetic identity #20500

Proved
WorkbookCorrected.plus_20500

by carlok · Sep 30, 2026 · Mathlib 0df444a (Lean v4.33.1)

arithmeticcorrectedelementaryworkbook

The elementary natural-number / rational identity

(29/45:Q)=(29/45:Q)(29/45:ℚ) = (29/45:ℚ)

holds by direct arithmetic evaluation.

Formalization Note: This corrects Lean-Workbook record lean_workbook_plus_20500, which omitted a compilable colon/type annotation and/or used a preamble of only Mathlib.Analysis.Complex.Basic.

Source: InternLM Lean-Workbook, record lean_workbook_plus_20500 (Apache-2.0).

Preamble
import Mathlib.Data.Rat.Defs
import Mathlib.Tactic.NormNum
Formal statement
theorem WorkbookCorrected.plus_20500 : (29/45:ℚ) = (29/45:ℚ) := by sorry
Source
https://huggingface.co/datasets/internlm/Lean-Workbook; record lean_workbook_plus_20500; Apache-2.0; corrects Open node 31ab12e2-d220-45fc-a14a-fadea91a45b3

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