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Theorem 3optocl 4946
Description: Implicit substitution of classes for ordered pairs. (Contributed by NM, 12-Mar-1995.)
Hypotheses
Ref Expression
3optocl.1  |-  R  =  ( D  X.  F
)
3optocl.2  |-  ( <.
x ,  y >.  =  A  ->  ( ph  <->  ps ) )
3optocl.3  |-  ( <.
z ,  w >.  =  B  ->  ( ps  <->  ch ) )
3optocl.4  |-  ( <.
v ,  u >.  =  C  ->  ( ch  <->  th ) )
3optocl.5  |-  ( ( ( x  e.  D  /\  y  e.  F
)  /\  ( z  e.  D  /\  w  e.  F )  /\  (
v  e.  D  /\  u  e.  F )
)  ->  ph )
Assertion
Ref Expression
3optocl  |-  ( ( A  e.  R  /\  B  e.  R  /\  C  e.  R )  ->  th )
Distinct variable groups:    x, y,
z, w, v, u, A    z, B, w, v, u    v, C, u    x, D, y, z, w, v, u   
x, F, y, z, w, v, u    z, R, w, v, u    ps, x, y    ch, z, w    th, v, u
Allowed substitution hints:    ph( x, y, z, w, v, u)    ps( z, w, v, u)    ch( x, y, v, u)    th( x, y, z, w)    B( x, y)    C( x, y, z, w)    R( x, y)

Proof of Theorem 3optocl
StepHypRef Expression
1 3optocl.1 . . . 4  |-  R  =  ( D  X.  F
)
2 3optocl.4 . . . . 5  |-  ( <.
v ,  u >.  =  C  ->  ( ch  <->  th ) )
32imbi2d 308 . . . 4  |-  ( <.
v ,  u >.  =  C  ->  ( (
( A  e.  R  /\  B  e.  R
)  ->  ch )  <->  ( ( A  e.  R  /\  B  e.  R
)  ->  th )
) )
4 3optocl.2 . . . . . . 7  |-  ( <.
x ,  y >.  =  A  ->  ( ph  <->  ps ) )
54imbi2d 308 . . . . . 6  |-  ( <.
x ,  y >.  =  A  ->  ( ( ( v  e.  D  /\  u  e.  F
)  ->  ph )  <->  ( (
v  e.  D  /\  u  e.  F )  ->  ps ) ) )
6 3optocl.3 . . . . . . 7  |-  ( <.
z ,  w >.  =  B  ->  ( ps  <->  ch ) )
76imbi2d 308 . . . . . 6  |-  ( <.
z ,  w >.  =  B  ->  ( (
( v  e.  D  /\  u  e.  F
)  ->  ps )  <->  ( ( v  e.  D  /\  u  e.  F
)  ->  ch )
) )
8 3optocl.5 . . . . . . 7  |-  ( ( ( x  e.  D  /\  y  e.  F
)  /\  ( z  e.  D  /\  w  e.  F )  /\  (
v  e.  D  /\  u  e.  F )
)  ->  ph )
983expia 1155 . . . . . 6  |-  ( ( ( x  e.  D  /\  y  e.  F
)  /\  ( z  e.  D  /\  w  e.  F ) )  -> 
( ( v  e.  D  /\  u  e.  F )  ->  ph )
)
101, 5, 7, 92optocl 4945 . . . . 5  |-  ( ( A  e.  R  /\  B  e.  R )  ->  ( ( v  e.  D  /\  u  e.  F )  ->  ch ) )
1110com12 29 . . . 4  |-  ( ( v  e.  D  /\  u  e.  F )  ->  ( ( A  e.  R  /\  B  e.  R )  ->  ch ) )
121, 3, 11optocl 4944 . . 3  |-  ( C  e.  R  ->  (
( A  e.  R  /\  B  e.  R
)  ->  th )
)
1312impcom 420 . 2  |-  ( ( ( A  e.  R  /\  B  e.  R
)  /\  C  e.  R )  ->  th )
14133impa 1148 1  |-  ( ( A  e.  R  /\  B  e.  R  /\  C  e.  R )  ->  th )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 177    /\ wa 359    /\ w3a 936    = wceq 1652    e. wcel 1725   <.cop 3809    X. cxp 4868
This theorem is referenced by:  ecopovtrn  6999
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1555  ax-5 1566  ax-17 1626  ax-9 1666  ax-8 1687  ax-14 1729  ax-6 1744  ax-7 1749  ax-11 1761  ax-12 1950  ax-ext 2416  ax-sep 4322  ax-nul 4330  ax-pr 4395
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3an 938  df-tru 1328  df-ex 1551  df-nf 1554  df-sb 1659  df-clab 2422  df-cleq 2428  df-clel 2431  df-nfc 2560  df-ne 2600  df-ral 2702  df-rex 2703  df-rab 2706  df-v 2950  df-dif 3315  df-un 3317  df-in 3319  df-ss 3326  df-nul 3621  df-if 3732  df-sn 3812  df-pr 3813  df-op 3815  df-opab 4259  df-xp 4876
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