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Theorem ltexpri 8876
Description: Proposition 9-3.5(iv) of [Gleason] p. 123. (Contributed by NM, 13-May-1996.) (Revised by Mario Carneiro, 14-Jun-2013.) (New usage is discouraged.)
Assertion
Ref Expression
ltexpri  |-  ( A 
<P  B  ->  E. x  e.  P.  ( A  +P.  x )  =  B )
Distinct variable groups:    x, A    x, B

Proof of Theorem ltexpri
Dummy variables  y 
z  w are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ltrelpr 8831 . . 3  |-  <P  C_  ( P.  X.  P. )
21brel 4885 . 2  |-  ( A 
<P  B  ->  ( A  e.  P.  /\  B  e.  P. ) )
3 ltprord 8863 . . 3  |-  ( ( A  e.  P.  /\  B  e.  P. )  ->  ( A  <P  B  <->  A  C.  B ) )
4 oveq2 6048 . . . . . . . . . . 11  |-  ( y  =  z  ->  (
w  +Q  y )  =  ( w  +Q  z ) )
54eleq1d 2470 . . . . . . . . . 10  |-  ( y  =  z  ->  (
( w  +Q  y
)  e.  B  <->  ( w  +Q  z )  e.  B
) )
65anbi2d 685 . . . . . . . . 9  |-  ( y  =  z  ->  (
( -.  w  e.  A  /\  ( w  +Q  y )  e.  B )  <->  ( -.  w  e.  A  /\  ( w  +Q  z
)  e.  B ) ) )
76exbidv 1633 . . . . . . . 8  |-  ( y  =  z  ->  ( E. w ( -.  w  e.  A  /\  (
w  +Q  y )  e.  B )  <->  E. w
( -.  w  e.  A  /\  ( w  +Q  z )  e.  B ) ) )
87cbvabv 2523 . . . . . . 7  |-  { y  |  E. w ( -.  w  e.  A  /\  ( w  +Q  y
)  e.  B ) }  =  { z  |  E. w ( -.  w  e.  A  /\  ( w  +Q  z
)  e.  B ) }
98ltexprlem5 8873 . . . . . 6  |-  ( ( B  e.  P.  /\  A  C.  B )  ->  { y  |  E. w ( -.  w  e.  A  /\  (
w  +Q  y )  e.  B ) }  e.  P. )
109adantll 695 . . . . 5  |-  ( ( ( A  e.  P.  /\  B  e.  P. )  /\  A  C.  B )  ->  { y  |  E. w ( -.  w  e.  A  /\  ( w  +Q  y
)  e.  B ) }  e.  P. )
118ltexprlem6 8874 . . . . . 6  |-  ( ( ( A  e.  P.  /\  B  e.  P. )  /\  A  C.  B )  ->  ( A  +P.  { y  |  E. w
( -.  w  e.  A  /\  ( w  +Q  y )  e.  B ) } ) 
C_  B )
128ltexprlem7 8875 . . . . . 6  |-  ( ( ( A  e.  P.  /\  B  e.  P. )  /\  A  C.  B )  ->  B  C_  ( A  +P.  { y  |  E. w ( -.  w  e.  A  /\  ( w  +Q  y
)  e.  B ) } ) )
1311, 12eqssd 3325 . . . . 5  |-  ( ( ( A  e.  P.  /\  B  e.  P. )  /\  A  C.  B )  ->  ( A  +P.  { y  |  E. w
( -.  w  e.  A  /\  ( w  +Q  y )  e.  B ) } )  =  B )
14 oveq2 6048 . . . . . . 7  |-  ( x  =  { y  |  E. w ( -.  w  e.  A  /\  ( w  +Q  y
)  e.  B ) }  ->  ( A  +P.  x )  =  ( A  +P.  { y  |  E. w ( -.  w  e.  A  /\  ( w  +Q  y
)  e.  B ) } ) )
1514eqeq1d 2412 . . . . . 6  |-  ( x  =  { y  |  E. w ( -.  w  e.  A  /\  ( w  +Q  y
)  e.  B ) }  ->  ( ( A  +P.  x )  =  B  <->  ( A  +P.  { y  |  E. w
( -.  w  e.  A  /\  ( w  +Q  y )  e.  B ) } )  =  B ) )
1615rspcev 3012 . . . . 5  |-  ( ( { y  |  E. w ( -.  w  e.  A  /\  (
w  +Q  y )  e.  B ) }  e.  P.  /\  ( A  +P.  { y  |  E. w ( -.  w  e.  A  /\  ( w  +Q  y
)  e.  B ) } )  =  B )  ->  E. x  e.  P.  ( A  +P.  x )  =  B )
1710, 13, 16syl2anc 643 . . . 4  |-  ( ( ( A  e.  P.  /\  B  e.  P. )  /\  A  C.  B )  ->  E. x  e.  P.  ( A  +P.  x )  =  B )
1817ex 424 . . 3  |-  ( ( A  e.  P.  /\  B  e.  P. )  ->  ( A  C.  B  ->  E. x  e.  P.  ( A  +P.  x )  =  B ) )
193, 18sylbid 207 . 2  |-  ( ( A  e.  P.  /\  B  e.  P. )  ->  ( A  <P  B  ->  E. x  e.  P.  ( A  +P.  x )  =  B ) )
202, 19mpcom 34 1  |-  ( A 
<P  B  ->  E. x  e.  P.  ( A  +P.  x )  =  B )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 359   E.wex 1547    = wceq 1649    e. wcel 1721   {cab 2390   E.wrex 2667    C. wpss 3281   class class class wbr 4172  (class class class)co 6040    +Q cplq 8686   P.cnp 8690    +P. cpp 8692    <P cltp 8694
This theorem is referenced by:  ltaprlem  8877  recexsrlem  8934  mulgt0sr  8936  map2psrpr  8941
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1552  ax-5 1563  ax-17 1623  ax-9 1662  ax-8 1683  ax-13 1723  ax-14 1725  ax-6 1740  ax-7 1745  ax-11 1757  ax-12 1946  ax-ext 2385  ax-sep 4290  ax-nul 4298  ax-pow 4337  ax-pr 4363  ax-un 4660  ax-inf2 7552
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3or 937  df-3an 938  df-tru 1325  df-ex 1548  df-nf 1551  df-sb 1656  df-eu 2258  df-mo 2259  df-clab 2391  df-cleq 2397  df-clel 2400  df-nfc 2529  df-ne 2569  df-ral 2671  df-rex 2672  df-reu 2673  df-rmo 2674  df-rab 2675  df-v 2918  df-sbc 3122  df-csb 3212  df-dif 3283  df-un 3285  df-in 3287  df-ss 3294  df-pss 3296  df-nul 3589  df-if 3700  df-pw 3761  df-sn 3780  df-pr 3781  df-tp 3782  df-op 3783  df-uni 3976  df-int 4011  df-iun 4055  df-br 4173  df-opab 4227  df-mpt 4228  df-tr 4263  df-eprel 4454  df-id 4458  df-po 4463  df-so 4464  df-fr 4501  df-we 4503  df-ord 4544  df-on 4545  df-lim 4546  df-suc 4547  df-om 4805  df-xp 4843  df-rel 4844  df-cnv 4845  df-co 4846  df-dm 4847  df-rn 4848  df-res 4849  df-ima 4850  df-iota 5377  df-fun 5415  df-fn 5416  df-f 5417  df-f1 5418  df-fo 5419  df-f1o 5420  df-fv 5421  df-ov 6043  df-oprab 6044  df-mpt2 6045  df-1st 6308  df-2nd 6309  df-recs 6592  df-rdg 6627  df-1o 6683  df-oadd 6687  df-omul 6688  df-er 6864  df-ni 8705  df-pli 8706  df-mi 8707  df-lti 8708  df-plpq 8741  df-mpq 8742  df-ltpq 8743  df-enq 8744  df-nq 8745  df-erq 8746  df-plq 8747  df-mq 8748  df-1nq 8749  df-rq 8750  df-ltnq 8751  df-np 8814  df-plp 8816  df-ltp 8818
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