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Theorem dedekindeulemeu 12947
Description: Lemma for dedekindeu 12948. Part of proving uniqueness. (Contributed by Jim Kingdon, 31-Jan-2024.)
Hypotheses
Ref Expression
dedekindeu.lss  |-  ( ph  ->  L  C_  RR )
dedekindeu.uss  |-  ( ph  ->  U  C_  RR )
dedekindeu.lm  |-  ( ph  ->  E. q  e.  RR  q  e.  L )
dedekindeu.um  |-  ( ph  ->  E. r  e.  RR  r  e.  U )
dedekindeu.lr  |-  ( ph  ->  A. q  e.  RR  ( q  e.  L  <->  E. r  e.  L  q  <  r ) )
dedekindeu.ur  |-  ( ph  ->  A. r  e.  RR  ( r  e.  U  <->  E. q  e.  U  q  <  r ) )
dedekindeu.disj  |-  ( ph  ->  ( L  i^i  U
)  =  (/) )
dedekindeu.loc  |-  ( ph  ->  A. q  e.  RR  A. r  e.  RR  (
q  <  r  ->  ( q  e.  L  \/  r  e.  U )
) )
dedekindeulemeu.are  |-  ( ph  ->  A  e.  RR )
dedekindeulemeu.ac  |-  ( ph  ->  ( A. q  e.  L  q  <  A  /\  A. r  e.  U  A  <  r ) )
dedekindeulemeu.bre  |-  ( ph  ->  B  e.  RR )
dedekindeulemeu.bc  |-  ( ph  ->  ( A. q  e.  L  q  <  B  /\  A. r  e.  U  B  <  r ) )
dedekindeulemeu.lt  |-  ( ph  ->  A  <  B )
Assertion
Ref Expression
dedekindeulemeu  |-  ( ph  -> F.  )
Distinct variable groups:    A, q, r    B, r    L, q, r    U, q, r
Allowed substitution hints:    ph( r, q)    B( q)

Proof of Theorem dedekindeulemeu
StepHypRef Expression
1 breq1 3964 . . . 4  |-  ( q  =  A  ->  (
q  <  A  <->  A  <  A ) )
2 dedekindeulemeu.ac . . . . . 6  |-  ( ph  ->  ( A. q  e.  L  q  <  A  /\  A. r  e.  U  A  <  r ) )
32simpld 111 . . . . 5  |-  ( ph  ->  A. q  e.  L  q  <  A )
43adantr 274 . . . 4  |-  ( (
ph  /\  A  e.  L )  ->  A. q  e.  L  q  <  A )
5 simpr 109 . . . 4  |-  ( (
ph  /\  A  e.  L )  ->  A  e.  L )
61, 4, 5rspcdva 2818 . . 3  |-  ( (
ph  /\  A  e.  L )  ->  A  <  A )
7 dedekindeulemeu.are . . . . 5  |-  ( ph  ->  A  e.  RR )
87ltnrd 7967 . . . 4  |-  ( ph  ->  -.  A  <  A
)
98adantr 274 . . 3  |-  ( (
ph  /\  A  e.  L )  ->  -.  A  <  A )
106, 9pm2.21fal 1352 . 2  |-  ( (
ph  /\  A  e.  L )  -> F.  )
11 breq2 3965 . . . 4  |-  ( r  =  B  ->  ( B  <  r  <->  B  <  B ) )
12 dedekindeulemeu.bc . . . . . 6  |-  ( ph  ->  ( A. q  e.  L  q  <  B  /\  A. r  e.  U  B  <  r ) )
1312simprd 113 . . . . 5  |-  ( ph  ->  A. r  e.  U  B  <  r )
1413adantr 274 . . . 4  |-  ( (
ph  /\  B  e.  U )  ->  A. r  e.  U  B  <  r )
15 simpr 109 . . . 4  |-  ( (
ph  /\  B  e.  U )  ->  B  e.  U )
1611, 14, 15rspcdva 2818 . . 3  |-  ( (
ph  /\  B  e.  U )  ->  B  <  B )
17 dedekindeulemeu.bre . . . . 5  |-  ( ph  ->  B  e.  RR )
1817ltnrd 7967 . . . 4  |-  ( ph  ->  -.  B  <  B
)
1918adantr 274 . . 3  |-  ( (
ph  /\  B  e.  U )  ->  -.  B  <  B )
2016, 19pm2.21fal 1352 . 2  |-  ( (
ph  /\  B  e.  U )  -> F.  )
21 dedekindeulemeu.lt . . 3  |-  ( ph  ->  A  <  B )
22 breq2 3965 . . . . 5  |-  ( r  =  B  ->  ( A  <  r  <->  A  <  B ) )
23 eleq1 2217 . . . . . 6  |-  ( r  =  B  ->  (
r  e.  U  <->  B  e.  U ) )
2423orbi2d 780 . . . . 5  |-  ( r  =  B  ->  (
( A  e.  L  \/  r  e.  U
)  <->  ( A  e.  L  \/  B  e.  U ) ) )
2522, 24imbi12d 233 . . . 4  |-  ( r  =  B  ->  (
( A  <  r  ->  ( A  e.  L  \/  r  e.  U
) )  <->  ( A  <  B  ->  ( A  e.  L  \/  B  e.  U ) ) ) )
26 breq1 3964 . . . . . . 7  |-  ( q  =  A  ->  (
q  <  r  <->  A  <  r ) )
27 eleq1 2217 . . . . . . . 8  |-  ( q  =  A  ->  (
q  e.  L  <->  A  e.  L ) )
2827orbi1d 781 . . . . . . 7  |-  ( q  =  A  ->  (
( q  e.  L  \/  r  e.  U
)  <->  ( A  e.  L  \/  r  e.  U ) ) )
2926, 28imbi12d 233 . . . . . 6  |-  ( q  =  A  ->  (
( q  <  r  ->  ( q  e.  L  \/  r  e.  U
) )  <->  ( A  <  r  ->  ( A  e.  L  \/  r  e.  U ) ) ) )
3029ralbidv 2454 . . . . 5  |-  ( q  =  A  ->  ( A. r  e.  RR  ( q  <  r  ->  ( q  e.  L  \/  r  e.  U
) )  <->  A. r  e.  RR  ( A  < 
r  ->  ( A  e.  L  \/  r  e.  U ) ) ) )
31 dedekindeu.loc . . . . 5  |-  ( ph  ->  A. q  e.  RR  A. r  e.  RR  (
q  <  r  ->  ( q  e.  L  \/  r  e.  U )
) )
3230, 31, 7rspcdva 2818 . . . 4  |-  ( ph  ->  A. r  e.  RR  ( A  <  r  -> 
( A  e.  L  \/  r  e.  U
) ) )
3325, 32, 17rspcdva 2818 . . 3  |-  ( ph  ->  ( A  <  B  ->  ( A  e.  L  \/  B  e.  U
) ) )
3421, 33mpd 13 . 2  |-  ( ph  ->  ( A  e.  L  \/  B  e.  U
) )
3510, 20, 34mpjaodan 788 1  |-  ( ph  -> F.  )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 103    <-> wb 104    \/ wo 698    = wceq 1332   F. wfal 1337    e. wcel 2125   A.wral 2432   E.wrex 2433    i^i cin 3097    C_ wss 3098   (/)c0 3390   class class class wbr 3961   RRcr 7710    < clt 7891
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1481  ax-10 1482  ax-11 1483  ax-i12 1484  ax-bndl 1486  ax-4 1487  ax-17 1503  ax-i9 1507  ax-ial 1511  ax-i5r 1512  ax-13 2127  ax-14 2128  ax-ext 2136  ax-sep 4078  ax-pow 4130  ax-pr 4164  ax-un 4388  ax-setind 4490  ax-cnex 7802  ax-resscn 7803  ax-pre-ltirr 7823
This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-fal 1338  df-nf 1438  df-sb 1740  df-eu 2006  df-mo 2007  df-clab 2141  df-cleq 2147  df-clel 2150  df-nfc 2285  df-ne 2325  df-nel 2420  df-ral 2437  df-rex 2438  df-rab 2441  df-v 2711  df-dif 3100  df-un 3102  df-in 3104  df-ss 3111  df-pw 3541  df-sn 3562  df-pr 3563  df-op 3565  df-uni 3769  df-br 3962  df-opab 4022  df-xp 4585  df-pnf 7893  df-mnf 7894  df-ltxr 7896
This theorem is referenced by:  dedekindeu  12948
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