Theorem 1q

Description: The number 1 is rational. (Contributed by SN, 30-Aug-2026)

	Ref	Expression
Assertion	1q	⊢ 1 ∈ ℚ

Proof

Step	Hyp	Ref	Expression
1		zssq	⊢ ℤ ⊆ ℚ
2		1z	⊢ 1 ∈ ℤ
3	1 2	sselii	⊢ 1 ∈ ℚ