Elementary arithmetic identity #40075
ProvedWorkbookCorrected.plus_40075arithmeticcorrectedelementaryworkbook
The elementary natural-number / rational identity
holds by direct arithmetic evaluation.
Formalization Note: This corrects Lean-Workbook record lean_workbook_plus_40075, 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_40075 (Apache-2.0).
Preamble
import Mathlib.Tactic.NormNum
Formal statement
theorem WorkbookCorrected.plus_40075 : 2000 + 2001 + 2002 + 2003 + 2004 + 2005 + 2006 = 14021 := by sorry
Source