Theorem 1q

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

	Ref	Expression
Assertion	1q	|- 1 e. QQ

Proof

Step	Hyp	Ref	Expression
1		zssq	|- ZZ C_ QQ
2		1z	|- 1 e. ZZ
3	1 2	sselii	|- 1 e. QQ