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Metamath Proof Explorer

Theorem zssq

Description: The integers are a subset of the rationals. (Contributed by NM, 9-Jan-2002)

Ref Expression
Assertion zssq ℤ ⊆ ℚ

Proof

Step Hyp Ref Expression
1 zq ⊢ ( 𝑥 ∈ ℤ → 𝑥 ∈ ℚ )
2 1 ssriv ⊢ ℤ ⊆ ℚ