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Theorem prloc 7848
Description: A Dedekind cut is located. (Contributed by Jim Kingdon, 23-Oct-2019.)
Assertion
Ref Expression
prloc  |-  ( (
<. L ,  U >.  e. 
P.  /\  A  <Q  B )  ->  ( A  e.  L  \/  B  e.  U ) )

Proof of Theorem prloc
Dummy variables  q  r are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 elinp 7831 . . . 4  |-  ( <. L ,  U >.  e. 
P. 
<->  ( ( ( L 
C_  Q.  /\  U  C_  Q. )  /\  ( E. q  e.  Q.  q  e.  L  /\  E. r  e.  Q.  r  e.  U ) )  /\  ( ( A. q  e.  Q.  ( q  e.  L  <->  E. r  e.  Q.  ( q  <Q  r  /\  r  e.  L
) )  /\  A. r  e.  Q.  (
r  e.  U  <->  E. q  e.  Q.  ( q  <Q 
r  /\  q  e.  U ) ) )  /\  A. q  e. 
Q.  -.  ( q  e.  L  /\  q  e.  U )  /\  A. q  e.  Q.  A. r  e.  Q.  ( q  <Q 
r  ->  ( q  e.  L  \/  r  e.  U ) ) ) ) )
2 simpr3 1036 . . . 4  |-  ( ( ( ( L  C_  Q.  /\  U  C_  Q. )  /\  ( E. q  e.  Q.  q  e.  L  /\  E. r  e.  Q.  r  e.  U )
)  /\  ( ( A. q  e.  Q.  ( q  e.  L  <->  E. r  e.  Q.  (
q  <Q  r  /\  r  e.  L ) )  /\  A. r  e.  Q.  (
r  e.  U  <->  E. q  e.  Q.  ( q  <Q 
r  /\  q  e.  U ) ) )  /\  A. q  e. 
Q.  -.  ( q  e.  L  /\  q  e.  U )  /\  A. q  e.  Q.  A. r  e.  Q.  ( q  <Q 
r  ->  ( q  e.  L  \/  r  e.  U ) ) ) )  ->  A. q  e.  Q.  A. r  e. 
Q.  ( q  <Q 
r  ->  ( q  e.  L  \/  r  e.  U ) ) )
31, 2sylbi 121 . . 3  |-  ( <. L ,  U >.  e. 
P.  ->  A. q  e.  Q.  A. r  e.  Q.  (
q  <Q  r  ->  (
q  e.  L  \/  r  e.  U )
) )
43adantr 276 . 2  |-  ( (
<. L ,  U >.  e. 
P.  /\  A  <Q  B )  ->  A. q  e.  Q.  A. r  e. 
Q.  ( q  <Q 
r  ->  ( q  e.  L  \/  r  e.  U ) ) )
5 simpr 110 . 2  |-  ( (
<. L ,  U >.  e. 
P.  /\  A  <Q  B )  ->  A  <Q  B )
6 ltrelnq 7722 . . . . . . 7  |-  <Q  C_  ( Q.  X.  Q. )
76brel 4822 . . . . . 6  |-  ( A 
<Q  B  ->  ( A  e.  Q.  /\  B  e.  Q. ) )
87simpld 112 . . . . 5  |-  ( A 
<Q  B  ->  A  e. 
Q. )
98adantl 277 . . . 4  |-  ( (
<. L ,  U >.  e. 
P.  /\  A  <Q  B )  ->  A  e.  Q. )
10 simpr 110 . . . . . . 7  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  q  =  A )  ->  q  =  A )
1110breq1d 4135 . . . . . 6  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  q  =  A )  ->  (
q  <Q  r  <->  A  <Q  r ) )
1210eleq1d 2307 . . . . . . 7  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  q  =  A )  ->  (
q  e.  L  <->  A  e.  L ) )
1312orbi1d 803 . . . . . 6  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  q  =  A )  ->  (
( q  e.  L  \/  r  e.  U
)  <->  ( A  e.  L  \/  r  e.  U ) ) )
1411, 13imbi12d 234 . . . . 5  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  q  =  A )  ->  (
( q  <Q  r  ->  ( q  e.  L  \/  r  e.  U
) )  <->  ( A  <Q  r  ->  ( A  e.  L  \/  r  e.  U ) ) ) )
1514ralbidv 2550 . . . 4  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  q  =  A )  ->  ( A. r  e.  Q.  ( q  <Q  r  ->  ( q  e.  L  \/  r  e.  U
) )  <->  A. r  e.  Q.  ( A  <Q  r  ->  ( A  e.  L  \/  r  e.  U ) ) ) )
169, 15rspcdv 2932 . . 3  |-  ( (
<. L ,  U >.  e. 
P.  /\  A  <Q  B )  ->  ( A. q  e.  Q.  A. r  e.  Q.  ( q  <Q 
r  ->  ( q  e.  L  \/  r  e.  U ) )  ->  A. r  e.  Q.  ( A  <Q  r  -> 
( A  e.  L  \/  r  e.  U
) ) ) )
177simprd 114 . . . . 5  |-  ( A 
<Q  B  ->  B  e. 
Q. )
1817adantl 277 . . . 4  |-  ( (
<. L ,  U >.  e. 
P.  /\  A  <Q  B )  ->  B  e.  Q. )
19 simpr 110 . . . . . 6  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  r  =  B )  ->  r  =  B )
2019breq2d 4137 . . . . 5  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  r  =  B )  ->  ( A  <Q  r  <->  A  <Q  B ) )
2119eleq1d 2307 . . . . . 6  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  r  =  B )  ->  (
r  e.  U  <->  B  e.  U ) )
2221orbi2d 802 . . . . 5  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  r  =  B )  ->  (
( A  e.  L  \/  r  e.  U
)  <->  ( A  e.  L  \/  B  e.  U ) ) )
2320, 22imbi12d 234 . . . 4  |-  ( ( ( <. L ,  U >.  e.  P.  /\  A  <Q  B )  /\  r  =  B )  ->  (
( A  <Q  r  ->  ( A  e.  L  \/  r  e.  U
) )  <->  ( A  <Q  B  ->  ( A  e.  L  \/  B  e.  U ) ) ) )
2418, 23rspcdv 2932 . . 3  |-  ( (
<. L ,  U >.  e. 
P.  /\  A  <Q  B )  ->  ( A. r  e.  Q.  ( A  <Q  r  ->  ( A  e.  L  \/  r  e.  U )
)  ->  ( A  <Q  B  ->  ( A  e.  L  \/  B  e.  U ) ) ) )
2516, 24syld 45 . 2  |-  ( (
<. L ,  U >.  e. 
P.  /\  A  <Q  B )  ->  ( A. q  e.  Q.  A. r  e.  Q.  ( q  <Q 
r  ->  ( q  e.  L  \/  r  e.  U ) )  -> 
( A  <Q  B  -> 
( A  e.  L  \/  B  e.  U
) ) ) )
264, 5, 25mp2d 47 1  |-  ( (
<. L ,  U >.  e. 
P.  /\  A  <Q  B )  ->  ( A  e.  L  \/  B  e.  U ) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 104    <-> wb 105    \/ wo 720    /\ w3a 1009    = wceq 1402    e. wcel 2209   A.wral 2528   E.wrex 2529    C_ wss 3220   <.cop 3708   class class class wbr 4125   Q.cnq 7637    <Q cltq 7642   P.cnp 7648
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4241  ax-sep 4244  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-iinf 4730
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-id 4433  df-iom 4733  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-qs 6803  df-ni 7661  df-nqqs 7705  df-ltnqqs 7710  df-inp 7823
This theorem is referenced by:  prarloclem3step  7853  addnqprlemfl  7916  addnqprlemfu  7917  mullocprlem  7927  mulnqprlemfl  7932  mulnqprlemfu  7933  ltsopr  7953  ltexprlemloc  7964  addcanprleml  7971  addcanprlemu  7972  recexprlemloc  7988  cauappcvgprlemladdru  8013  cauappcvgprlemladdrl  8014  caucvgprlemladdrl  8035
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