Choosing zero elements

Proved

WorkbookRestored.plus_51564

by wamlart · Sep 12, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

lean-workbookrestored-importssource-checked

For every natural number $n$ , $\binom n0=1$ .

Source: Lean-Workbook row lean_workbook_plus_51564 (Apache-2.0). The unchanged proposition comes from the original record; its missing mathematical imports and namespaces are restored here.

Preamble

import Mathlib.Data.Nat.Choose.Basic
open Nat

Formal statement

theorem WorkbookRestored.plus_51564 : ∀ n : ℕ, choose n 0 = 1   :=  by sorry

Source

https://huggingface.co/datasets/internlm/Lean-Workbook/blob/main/lean_workbook.json, row lean_workbook_plus_51564; immutable original Prove2Me node eed219fd-9fe2-4c1d-bdc9-5bbdeda0f160

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