Theorem qct

Description: The set of rational numbers is countable. (Contributed by Glauco Siliprandi, 24-Dec-2020)

	Ref	Expression
Assertion	qct	⊢ ℚ ≼ ω

Proof

Step	Hyp	Ref	Expression
1		qenom	⊢ ℚ ≈ ω
2		endom	⊢ ( ℚ ≈ ω → ℚ ≼ ω )
3	1 2	ax-mp	⊢ ℚ ≼ ω