Theorem imim1d 75

Description: Deduction adding nested consequents. (Contributed by NM, 3-Apr-1994.) (Proof shortened by Wolf Lammen, 12-Sep-2012.)

Hypothesis

Ref	Expression
imim1d.1	|- ( ph -> ( ps -> ch ) )

Assertion

Ref	Expression
imim1d	|- ( ph -> ( ( ch -> th ) -> ( ps -> th ) ) )

Proof of Theorem imim1d

Step	Hyp	Ref	Expression
1		imim1d.1	. 2 |- ( ph -> ( ps -> ch ) )
2		idd 21	. 2 |- ( ph -> ( th -> th ) )
3	1, 2	imim12d 74	1 |- ( ph -> ( ( ch -> th ) -> ( ps -> th ) ) )

Syntax hints:   -> wi 4

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7

This theorem is referenced by:  imim1  76  imbi1d  231  expt  661  hbimd  1619  moim  2142  moimv  2144  sstr2  3231  ssralv  3288  soss  4405  nneneq  7026  prarloclem3  7695  fzind  9573  exbtwnzlemshrink  10480  rebtwn2zlemshrink  10485  seq3fveq2  10709  seqfveq2g  10711  seq3shft2  10715  seqshft2g  10716  monoord  10719  seq3split  10722  seqsplitg  10723  seq3id2  10760  seqhomog  10764  seq3coll  11077  rexico  11748  cnntr  14915  2sqlem6  15815  setindft  16411