Metamath Proof Explorer

Theorem bj-spnfw

Description: Theorem close to a closed form of spnfw . (Contributed by BJ, 12-May-2019)

Ref Expression
Assertion bj-spnfw 
|- ( ( E. x ph -> ps ) -> ( A. x ph -> ps ) )

Proof

Step Hyp Ref Expression
1 19.2 
 |-  ( A. x ph -> E. x ph )
2 1 imim1i 
 |-  ( ( E. x ph -> ps ) -> ( A. x ph -> ps ) )