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Theorem ltexprlem5 8659
Description: Lemma for Proposition 9-3.5(iv) of [Gleason] p. 123. (Contributed by NM, 6-Apr-1996.) (New usage is discouraged.)
Hypothesis
Ref Expression
ltexprlem.1  |-  C  =  { x  |  E. y ( -.  y  e.  A  /\  (
y  +Q  x )  e.  B ) }
Assertion
Ref Expression
ltexprlem5  |-  ( ( B  e.  P.  /\  A  C.  B )  ->  C  e.  P. )
Distinct variable groups:    x, y, A    x, B, y    x, C
Dummy variable  z is distinct from all other variables.
Allowed substitution hint:    C( y)

Proof of Theorem ltexprlem5
StepHypRef Expression
1 ltexprlem.1 . . . . . 6  |-  C  =  { x  |  E. y ( -.  y  e.  A  /\  (
y  +Q  x )  e.  B ) }
21ltexprlem1 8655 . . . . 5  |-  ( B  e.  P.  ->  ( A  C.  B  ->  C  =/=  (/) ) )
3 0pss 3493 . . . . 5  |-  ( (/)  C.  C  <->  C  =/=  (/) )
42, 3syl6ibr 220 . . . 4  |-  ( B  e.  P.  ->  ( A  C.  B  ->  (/)  C.  C
) )
54imp 420 . . 3  |-  ( ( B  e.  P.  /\  A  C.  B )  ->  (/)  C.  C )
61ltexprlem2 8656 . . . 4  |-  ( B  e.  P.  ->  C  C.  Q. )
76adantr 453 . . 3  |-  ( ( B  e.  P.  /\  A  C.  B )  ->  C  C.  Q. )
81ltexprlem3 8657 . . . . . 6  |-  ( B  e.  P.  ->  (
x  e.  C  ->  A. z ( z  <Q  x  ->  z  e.  C
) ) )
91ltexprlem4 8658 . . . . . . 7  |-  ( B  e.  P.  ->  (
x  e.  C  ->  E. z ( z  e.  C  /\  x  <Q  z ) ) )
10 df-rex 2550 . . . . . . 7  |-  ( E. z  e.  C  x 
<Q  z  <->  E. z ( z  e.  C  /\  x  <Q  z ) )
119, 10syl6ibr 220 . . . . . 6  |-  ( B  e.  P.  ->  (
x  e.  C  ->  E. z  e.  C  x  <Q  z ) )
128, 11jcad 521 . . . . 5  |-  ( B  e.  P.  ->  (
x  e.  C  -> 
( A. z ( z  <Q  x  ->  z  e.  C )  /\  E. z  e.  C  x 
<Q  z ) ) )
1312ralrimiv 2626 . . . 4  |-  ( B  e.  P.  ->  A. x  e.  C  ( A. z ( z  <Q  x  ->  z  e.  C
)  /\  E. z  e.  C  x  <Q  z ) )
1413adantr 453 . . 3  |-  ( ( B  e.  P.  /\  A  C.  B )  ->  A. x  e.  C  ( A. z ( z 
<Q  x  ->  z  e.  C )  /\  E. z  e.  C  x  <Q  z ) )
155, 7, 14jca31 522 . 2  |-  ( ( B  e.  P.  /\  A  C.  B )  -> 
( ( (/)  C.  C  /\  C  C.  Q. )  /\  A. x  e.  C  ( A. z ( z 
<Q  x  ->  z  e.  C )  /\  E. z  e.  C  x  <Q  z ) ) )
16 elnp 8606 . 2  |-  ( C  e.  P.  <->  ( ( (/)  C.  C  /\  C  C.  Q. )  /\  A. x  e.  C  ( A. z ( z  <Q  x  ->  z  e.  C
)  /\  E. z  e.  C  x  <Q  z ) ) )
1715, 16sylibr 205 1  |-  ( ( B  e.  P.  /\  A  C.  B )  ->  C  e.  P. )
Colors of variables: wff set class
Syntax hints:   -. wn 5    -> wi 6    /\ wa 360   A.wal 1528   E.wex 1529    = wceq 1624    e. wcel 1685   {cab 2270    =/= wne 2447   A.wral 2544   E.wrex 2545    C. wpss 3154   (/)c0 3456   class class class wbr 4024  (class class class)co 5819   Q.cnq 8469    +Q cplq 8472    <Q cltq 8475   P.cnp 8476
This theorem is referenced by:  ltexprlem6  8660  ltexprlem7  8661  ltexpri  8662
This theorem was proved from axioms:  ax-1 7  ax-2 8  ax-3 9  ax-mp 10  ax-gen 1534  ax-5 1545  ax-17 1604  ax-9 1637  ax-8 1645  ax-13 1687  ax-14 1689  ax-6 1704  ax-7 1709  ax-11 1716  ax-12 1867  ax-ext 2265  ax-sep 4142  ax-nul 4150  ax-pow 4187  ax-pr 4213  ax-un 4511  ax-inf2 7337
This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3or 937  df-3an 938  df-tru 1312  df-ex 1530  df-nf 1533  df-sb 1632  df-eu 2148  df-mo 2149  df-clab 2271  df-cleq 2277  df-clel 2280  df-nfc 2409  df-ne 2449  df-ral 2549  df-rex 2550  df-reu 2551  df-rmo 2552  df-rab 2553  df-v 2791  df-sbc 2993  df-csb 3083  df-dif 3156  df-un 3158  df-in 3160  df-ss 3167  df-pss 3169  df-nul 3457  df-if 3567  df-pw 3628  df-sn 3647  df-pr 3648  df-tp 3649  df-op 3650  df-uni 3829  df-int 3864  df-iun 3908  df-br 4025  df-opab 4079  df-mpt 4080  df-tr 4115  df-eprel 4304  df-id 4308  df-po 4313  df-so 4314  df-fr 4351  df-we 4353  df-ord 4394  df-on 4395  df-lim 4396  df-suc 4397  df-om 4656  df-xp 4694  df-rel 4695  df-cnv 4696  df-co 4697  df-dm 4698  df-rn 4699  df-res 4700  df-ima 4701  df-fun 5223  df-fn 5224  df-f 5225  df-f1 5226  df-fo 5227  df-f1o 5228  df-fv 5229  df-ov 5822  df-oprab 5823  df-mpt2 5824  df-1st 6083  df-2nd 6084  df-recs 6383  df-rdg 6418  df-1o 6474  df-oadd 6478  df-omul 6479  df-er 6655  df-ni 8491  df-pli 8492  df-mi 8493  df-lti 8494  df-plpq 8527  df-mpq 8528  df-ltpq 8529  df-enq 8530  df-nq 8531  df-erq 8532  df-plq 8533  df-mq 8534  df-1nq 8535  df-ltnq 8537  df-np 8600
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