Theorem 11nn0

Description: 11 is a nonnegative integer. (Contributed by Umit Teoman Dogan, 10-Jun-2026)

	Ref	Expression
Assertion	11nn0	⊢ ; 1 1 ∈ ℕ0

Proof

Step	Hyp	Ref	Expression
1		1nn0	⊢ 1 ∈ ℕ0
2	1 1	deccl	⊢ ; 1 1 ∈ ℕ0