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Theorem 2uasbanh 28327
Description: Distribute the unabbreviated form of proper substitution in and out of a conjunction. 2uasbanh 28327 is derived from 2uasbanhVD 28687. (Contributed by Alan Sare, 31-May-2014.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypothesis
Ref Expression
2uasbanh.1  |-  ( ch  <->  ( E. x E. y
( ( x  =  u  /\  y  =  v )  /\  ph )  /\  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ps ) ) )
Assertion
Ref Expression
2uasbanh  |-  ( E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\ 
ps ) )  <->  ( E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ph )  /\  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ps ) ) )
Distinct variable groups:    x, u    y, u    x, v    y,
v
Allowed substitution hints:    ph( x, y, v, u)    ps( x, y, v, u)    ch( x, y, v, u)

Proof of Theorem 2uasbanh
StepHypRef Expression
1 simpl 443 . . . . 5  |-  ( ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\ 
ps ) )  -> 
( x  =  u  /\  y  =  v ) )
2 simprl 732 . . . . 5  |-  ( ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\ 
ps ) )  ->  ph )
31, 2jca 518 . . . 4  |-  ( ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\ 
ps ) )  -> 
( ( x  =  u  /\  y  =  v )  /\  ph ) )
432eximi 1564 . . 3  |-  ( E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\ 
ps ) )  ->  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ph )
)
5 simprr 733 . . . . 5  |-  ( ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\ 
ps ) )  ->  ps )
61, 5jca 518 . . . 4  |-  ( ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\ 
ps ) )  -> 
( ( x  =  u  /\  y  =  v )  /\  ps ) )
762eximi 1564 . . 3  |-  ( E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\ 
ps ) )  ->  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ps )
)
84, 7jca 518 . 2  |-  ( E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\ 
ps ) )  -> 
( E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ph )  /\  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ps ) ) )
9 2uasbanh.1 . . 3  |-  ( ch  <->  ( E. x E. y
( ( x  =  u  /\  y  =  v )  /\  ph )  /\  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ps ) ) )
109simplbi 446 . . . . . 6  |-  ( ch 
->  E. x E. y
( ( x  =  u  /\  y  =  v )  /\  ph ) )
11 simpl 443 . . . . . . . . . 10  |-  ( ( ( x  =  u  /\  y  =  v )  /\  ph )  ->  ( x  =  u  /\  y  =  v ) )
12112eximi 1564 . . . . . . . . 9  |-  ( E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ph )  ->  E. x E. y
( x  =  u  /\  y  =  v ) )
1310, 12syl 15 . . . . . . . 8  |-  ( ch 
->  E. x E. y
( x  =  u  /\  y  =  v ) )
14 a9e2ndeq 28325 . . . . . . . 8  |-  ( ( -.  A. x  x  =  y  \/  u  =  v )  <->  E. x E. y ( x  =  u  /\  y  =  v ) )
1513, 14sylibr 203 . . . . . . 7  |-  ( ch 
->  ( -.  A. x  x  =  y  \/  u  =  v )
)
16 2sb5nd 28326 . . . . . . 7  |-  ( ( -.  A. x  x  =  y  \/  u  =  v )  -> 
( [ u  /  x ] [ v  / 
y ] ph  <->  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ph ) ) )
1715, 16syl 15 . . . . . 6  |-  ( ch 
->  ( [ u  /  x ] [ v  / 
y ] ph  <->  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ph ) ) )
1810, 17mpbird 223 . . . . 5  |-  ( ch 
->  [ u  /  x ] [ v  /  y ] ph )
199simprbi 450 . . . . . 6  |-  ( ch 
->  E. x E. y
( ( x  =  u  /\  y  =  v )  /\  ps ) )
20 2sb5nd 28326 . . . . . . 7  |-  ( ( -.  A. x  x  =  y  \/  u  =  v )  -> 
( [ u  /  x ] [ v  / 
y ] ps  <->  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ps ) ) )
2115, 20syl 15 . . . . . 6  |-  ( ch 
->  ( [ u  /  x ] [ v  / 
y ] ps  <->  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ps ) ) )
2219, 21mpbird 223 . . . . 5  |-  ( ch 
->  [ u  /  x ] [ v  /  y ] ps )
23 sban 2009 . . . . . . 7  |-  ( [ v  /  y ] ( ph  /\  ps ) 
<->  ( [ v  / 
y ] ph  /\  [ v  /  y ] ps ) )
2423sbbii 1634 . . . . . 6  |-  ( [ u  /  x ] [ v  /  y ] ( ph  /\  ps )  <->  [ u  /  x ] ( [ v  /  y ] ph  /\ 
[ v  /  y ] ps ) )
25 sban 2009 . . . . . 6  |-  ( [ u  /  x ]
( [ v  / 
y ] ph  /\  [ v  /  y ] ps )  <->  ( [
u  /  x ] [ v  /  y ] ph  /\  [ u  /  x ] [ v  /  y ] ps ) )
2624, 25bitri 240 . . . . 5  |-  ( [ u  /  x ] [ v  /  y ] ( ph  /\  ps )  <->  ( [ u  /  x ] [ v  /  y ] ph  /\ 
[ u  /  x ] [ v  /  y ] ps ) )
2718, 22, 26sylanbrc 645 . . . 4  |-  ( ch 
->  [ u  /  x ] [ v  /  y ] ( ph  /\  ps ) )
28 2sb5nd 28326 . . . . 5  |-  ( ( -.  A. x  x  =  y  \/  u  =  v )  -> 
( [ u  /  x ] [ v  / 
y ] ( ph  /\ 
ps )  <->  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\  ps )
) ) )
2915, 28syl 15 . . . 4  |-  ( ch 
->  ( [ u  /  x ] [ v  / 
y ] ( ph  /\ 
ps )  <->  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\  ps )
) ) )
3027, 29mpbid 201 . . 3  |-  ( ch 
->  E. x E. y
( ( x  =  u  /\  y  =  v )  /\  ( ph  /\  ps ) ) )
319, 30sylbir 204 . 2  |-  ( ( E. x E. y
( ( x  =  u  /\  y  =  v )  /\  ph )  /\  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ps ) )  ->  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\  ps )
) )
328, 31impbii 180 1  |-  ( E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ( ph  /\ 
ps ) )  <->  ( E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ph )  /\  E. x E. y ( ( x  =  u  /\  y  =  v )  /\  ps ) ) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    <-> wb 176    \/ wo 357    /\ wa 358   A.wal 1527   E.wex 1528   [wsb 1629
This theorem is referenced by:  2uasban  28328
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-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-tru 1310  df-fal 1311  df-ex 1529  df-nf 1532  df-sb 1630  df-clab 2270  df-cleq 2276  df-clel 2279  df-ne 2448  df-v 2790
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