Metamath Proof Explorer


Theorem bj-jarrii

Description: Inference associated with jarri . Contrary to it , it does not require ax-2 , but only ax-mp and ax-1 . (Contributed by BJ, 29-Mar-2020) (Proof modification is discouraged.)

Ref Expression
Hypotheses bj-jarrii.1 ( ( 𝜑𝜓 ) → 𝜒 )
bj-jarrii.2 𝜓
Assertion bj-jarrii 𝜒

Proof

Step Hyp Ref Expression
1 bj-jarrii.1 ( ( 𝜑𝜓 ) → 𝜒 )
2 bj-jarrii.2 𝜓
3 2 a1i ( 𝜑𝜓 )
4 3 1 ax-mp 𝜒