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Theorem bnj124 28276
Description: Technical lemma for bnj150 28281. This lemma may no longer be used or have become an indirect lemma of the theorem in question (i.e. a lemma of a lemma... of the theorem). (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (Proof shortened by Mario Carneiro, 22-Dec-2016.) (New usage is discouraged.)
Hypotheses
Ref Expression
bnj124.1  |-  F  =  { <. (/) ,  pred (
x ,  A ,  R ) >. }
bnj124.2  |-  ( ph"  <->  [. F  / 
f ]. ph' )
bnj124.3  |-  ( ps"  <->  [. F  / 
f ]. ps' )
bnj124.4  |-  ( ze"  <->  [. F  / 
f ]. ze' )
bnj124.5  |-  ( ze'  <->  (
( R  FrSe  A  /\  x  e.  A
)  ->  ( f  Fn  1o  /\  ph'  /\  ps' ) ) )
Assertion
Ref Expression
bnj124  |-  ( ze"  <->  ( ( R  FrSe  A  /\  x  e.  A )  ->  ( F  Fn  1o  /\  ph"  /\  ps" ) ) )
Distinct variable groups:    A, f    R, f    x, f
Allowed substitution hints:    A( x)    R( x)    F( x, f)    ph'( x, f)    ps'( x, f)    ze'( x, f)    ph"( x, f)    ps"( x, f)    ze"( x, f)

Proof of Theorem bnj124
Dummy variable  z is distinct from all other variables.
StepHypRef Expression
1 bnj124.4 . 2  |-  ( ze"  <->  [. F  / 
f ]. ze' )
2 bnj124.5 . . . 4  |-  ( ze'  <->  (
( R  FrSe  A  /\  x  e.  A
)  ->  ( f  Fn  1o  /\  ph'  /\  ps' ) ) )
32sbcbii 3046 . . 3  |-  ( [. F  /  f ]. ze'  <->  [. F  / 
f ]. ( ( R 
FrSe  A  /\  x  e.  A )  ->  (
f  Fn  1o  /\  ph' 
/\  ps' ) ) )
4 bnj124.1 . . . . 5  |-  F  =  { <. (/) ,  pred (
x ,  A ,  R ) >. }
54bnj95 28269 . . . 4  |-  F  e. 
_V
6 nfv 1605 . . . . 5  |-  F/ f ( R  FrSe  A  /\  x  e.  A
)
76sbc19.21g 3055 . . . 4  |-  ( F  e.  _V  ->  ( [. F  /  f ]. ( ( R  FrSe  A  /\  x  e.  A
)  ->  ( f  Fn  1o  /\  ph'  /\  ps' ) )  <-> 
( ( R  FrSe  A  /\  x  e.  A
)  ->  [. F  / 
f ]. ( f  Fn  1o  /\  ph'  /\  ps' ) ) ) )
85, 7ax-mp 8 . . 3  |-  ( [. F  /  f ]. (
( R  FrSe  A  /\  x  e.  A
)  ->  ( f  Fn  1o  /\  ph'  /\  ps' ) )  <-> 
( ( R  FrSe  A  /\  x  e.  A
)  ->  [. F  / 
f ]. ( f  Fn  1o  /\  ph'  /\  ps' ) ) )
9 fneq1 5333 . . . . . . . 8  |-  ( f  =  z  ->  (
f  Fn  1o  <->  z  Fn  1o ) )
10 fneq1 5333 . . . . . . . 8  |-  ( z  =  F  ->  (
z  Fn  1o  <->  F  Fn  1o ) )
119, 10sbcie2g 3024 . . . . . . 7  |-  ( F  e.  _V  ->  ( [. F  /  f ]. f  Fn  1o  <->  F  Fn  1o ) )
125, 11ax-mp 8 . . . . . 6  |-  ( [. F  /  f ]. f  Fn  1o  <->  F  Fn  1o )
1312bicomi 193 . . . . 5  |-  ( F  Fn  1o  <->  [. F  / 
f ]. f  Fn  1o )
14 bnj124.2 . . . . 5  |-  ( ph"  <->  [. F  / 
f ]. ph' )
15 bnj124.3 . . . . 5  |-  ( ps"  <->  [. F  / 
f ]. ps' )
1613, 14, 15, 5bnj206 28132 . . . 4  |-  ( [. F  /  f ]. (
f  Fn  1o  /\  ph' 
/\  ps' )  <->  ( F  Fn  1o  /\  ph"  /\  ps" ) )
1716imbi2i 303 . . 3  |-  ( ( ( R  FrSe  A  /\  x  e.  A
)  ->  [. F  / 
f ]. ( f  Fn  1o  /\  ph'  /\  ps' ) )  <-> 
( ( R  FrSe  A  /\  x  e.  A
)  ->  ( F  Fn  1o  /\  ph"  /\  ps" ) ) )
183, 8, 173bitri 262 . 2  |-  ( [. F  /  f ]. ze'  <->  ( ( R  FrSe  A  /\  x  e.  A )  ->  ( F  Fn  1o  /\  ph"  /\  ps" ) ) )
191, 18bitri 240 1  |-  ( ze"  <->  ( ( R  FrSe  A  /\  x  e.  A )  ->  ( F  Fn  1o  /\  ph"  /\  ps" ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 176    /\ wa 358    /\ w3a 934    = wceq 1623    e. wcel 1684   _Vcvv 2788   [.wsbc 2991   (/)c0 3455   {csn 3640   <.cop 3643    Fn wfn 5250   1oc1o 6472    predc-bnj14 28086    FrSe w-bnj15 28090
This theorem is referenced by:  bnj150  28281  bnj153  28285
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-sep 4141  ax-nul 4149  ax-pr 4214
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-tru 1310  df-ex 1529  df-nf 1532  df-sb 1630  df-clab 2270  df-cleq 2276  df-clel 2279  df-nfc 2408  df-ne 2448  df-rab 2552  df-v 2790  df-sbc 2992  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-nul 3456  df-if 3566  df-sn 3646  df-pr 3647  df-op 3649  df-br 4024  df-opab 4078  df-rel 4696  df-cnv 4697  df-co 4698  df-dm 4699  df-fun 5257  df-fn 5258
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