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Metamath Proof Explorer


Theorem eluzelzd

Description: A member of an upper set of integers is an integer. (Contributed by Glauco Siliprandi, 8-Apr-2021)

Ref Expression
Hypothesis eluzelzd.1 φ N M
Assertion eluzelzd φ N

Proof

Step Hyp Ref Expression
1 eluzelzd.1 φ N M
2 eluzelz N M N
3 1 2 syl φ N