Theorem jcab 603

Description: Distributive law for implication over conjunction. Compare Theorem *4.76 of [WhiteheadRussell] p. 121. (Contributed by NM, 3-Apr-1994.) (Proof shortened by Wolf Lammen, 27-Nov-2013.)

Assertion

Ref	Expression
jcab	|- ( ( ph -> ( ps /\ ch ) ) <-> ( ( ph -> ps ) /\ ( ph -> ch ) ) )

Proof of Theorem jcab

Step	Hyp	Ref	Expression
1		simpl 109	. . . 4 |- ( ( ps /\ ch ) -> ps )
2	1	imim2i 12	. . 3 |- ( ( ph -> ( ps /\ ch ) ) -> ( ph -> ps ) )
3		simpr 110	. . . 4 |- ( ( ps /\ ch ) -> ch )
4	3	imim2i 12	. . 3 |- ( ( ph -> ( ps /\ ch ) ) -> ( ph -> ch ) )
5	2, 4	jca 306	. 2 |- ( ( ph -> ( ps /\ ch ) ) -> ( ( ph -> ps ) /\ ( ph -> ch ) ) )
6		pm3.43 602	. 2 |- ( ( ( ph -> ps ) /\ ( ph -> ch ) ) -> ( ph -> ( ps /\ ch ) ) )
7	5, 6	impbii 126	1 |- ( ( ph -> ( ps /\ ch ) ) <-> ( ( ph -> ps ) /\ ( ph -> ch ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This theorem depends on definitions:  df-bi 117

This theorem is referenced by:  pm4.76  604  pm5.44  926  2eu4  2138  ssconb  3296  ssin  3385  raaan  3556  tfri3  6425  omniwomnimkv  7233  isprm2  12285  lgsquad2lem2  15323