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 ) ) )

This proof depends on syntax axioms:   -> wi 4

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7

This theorem is used by:  imim1  76  imbi1d  231  expt  667  hbimd  1626  moim  2151  moimv  2153  sstr2  3255  ssralv  3312  soss  4459  nneneq  7158  prarloclem3  7864  fzind  9765  exbtwnzlemshrink  10693  rebtwn2zlemshrink  10698  seq3fveq2  10925  seqfveq2g  10927  seq3shft2  10931  seqshft2g  10932  monoord  10935  seq3split  10938  seqsplitg  10939  seq3id2  10976  seqhomog  10980  seq3coll  11308  rexico  12002  cnntr  15375  bcmono  16202  2sqlem6  16337  eupth2lemsfi  16817  setindft  17089