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 ≈ ω

Proof

Step	Hyp	Ref	Expression
1		znnen	⊢ ℤ ≈ ℕ
2		nnenom	⊢ ℕ ≈ ω
3	1 2	entri	⊢ ℤ ≈ ω