Theorem prth 326

Description: Theorem *3.47 of [WhiteheadRussell] p. 113. It was proved by Leibniz, and it evidently pleased him enough to call it 'praeclarum theorema' (splendid theorem). (Contributed by NM, 12-Aug-1993.) (Proof shortened by Wolf Lammen, 7-Apr-2013.)

Assertion

Ref	Expression
prth	|- ( ( ( ph -> ps ) /\ ( ch -> th ) ) -> ( ( ph /\ ch ) -> ( ps /\ th ) ) )

Proof of Theorem prth

Step	Hyp	Ref	Expression
1		simpl 102	. 2 |- ( ( ( ph -> ps ) /\ ( ch -> th ) ) -> ( ph -> ps ) )
2		simpr 103	. 2 |- ( ( ( ph -> ps ) /\ ( ch -> th ) ) -> ( ch -> th ) )
3	1, 2	anim12d 318	1 |- ( ( ( ph -> ps ) /\ ( ch -> th ) ) -> ( ( ph /\ ch ) -> ( ps /\ th ) ) )

Syntax hints:   -> wi 4   /\ wa 97

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101

This theorem depends on definitions:  df-bi 110

This theorem is referenced by:  nfand  1460  equsexd  1617  mo23  1941  euind  2728  reuind  2744  reuss2  3217  opelopabt  3999  reusv3i  4191