Elementary arithmetic identity #11129
ProvedWorkbookCorrected.plus_11129arithmeticcorrectedelementaryworkbook
The elementary natural-number / rational identity
holds by direct arithmetic evaluation.
Formalization Note: This corrects Lean-Workbook record lean_workbook_plus_11129, 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_11129 (Apache-2.0).
Preamble
import Mathlib.Tactic.NormNum
Formal statement
theorem WorkbookCorrected.plus_11129 : 1 + 21 + 70 + 84 + 45 + 11 + 1 = 233 := by sorry
Source