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Metamath Proof Explorer

Theorem zenom

Description: The set of integer numbers is equinumerous to omega (the set of finite ordinal numbers). (Contributed by Glauco Siliprandi, 17-Aug-2020)

		Ref	Expression
	Assertion	zenom	$⊢ ℤ \approx ω$

Proof

Step	Hyp	Ref	Expression
1		znnen	$⊢ ℤ \approx ℕ$
2		nnenom	$⊢ ℕ \approx ω$
3	1 2	entri	$⊢ ℤ \approx ω$