Metamath Proof Explorer


Theorem 0finOLD

Description: Obsolete version of 0fi as of 13-Jan-2025. (Contributed by FL, 14-Jul-2008) (Proof modification is discouraged.) (New usage is discouraged.)

Ref Expression
Assertion 0finOLD Fin

Proof

Step Hyp Ref Expression
1 peano1 ω
2 ssid
3 ssnnfi ω Fin
4 1 2 3 mp2an Fin