Theorem bj-19.23bit 32681

Description: Closed form of 19.23bi 2061. (Contributed by BJ, 20-Oct-2019.)

Assertion

Ref	Expression
bj-19.23bit	|- ( ( E. x ph -> ps ) -> ( ph -> ps ) )

Proof of Theorem bj-19.23bit

Step	Hyp	Ref	Expression
1		19.8a 2052	. 2 |- ( ph -> E. x ph )
2	1	imim1i 63	1 |- ( ( E. x ph -> ps ) -> ( ph -> ps ) )

Syntax hints:   -> wi 4   E.wex 1704

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-12 2047

This theorem depends on definitions:  df-bi 197  df-ex 1705

This theorem is referenced by: (None)