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Theorem prarloc2 7691
Description: A Dedekind cut is arithmetically located. This is a variation of prarloc 7690 which only constructs one (named) point and is therefore often easier to work with. It states that given a tolerance  P, there are elements of the lower and upper cut which are exactly that tolerance from each other. (Contributed by Jim Kingdon, 26-Dec-2019.)
Assertion
Ref Expression
prarloc2  |-  ( (
<. L ,  U >.  e. 
P.  /\  P  e.  Q. )  ->  E. a  e.  L  ( a  +Q  P )  e.  U
)
Distinct variable groups:    L, a    P, a    U, a

Proof of Theorem prarloc2
Dummy variable  b is distinct from all other variables.
StepHypRef Expression
1 prarloc 7690 . 2  |-  ( (
<. L ,  U >.  e. 
P.  /\  P  e.  Q. )  ->  E. a  e.  L  E. b  e.  U  b  <Q  ( a  +Q  P ) )
2 prcunqu 7672 . . . . 5  |-  ( (
<. L ,  U >.  e. 
P.  /\  b  e.  U )  ->  (
b  <Q  ( a  +Q  P )  ->  (
a  +Q  P )  e.  U ) )
32rexlimdva 2648 . . . 4  |-  ( <. L ,  U >.  e. 
P.  ->  ( E. b  e.  U  b  <Q  ( a  +Q  P )  ->  ( a  +Q  P )  e.  U
) )
43reximdv 2631 . . 3  |-  ( <. L ,  U >.  e. 
P.  ->  ( E. a  e.  L  E. b  e.  U  b  <Q  ( a  +Q  P )  ->  E. a  e.  L  ( a  +Q  P
)  e.  U ) )
54adantr 276 . 2  |-  ( (
<. L ,  U >.  e. 
P.  /\  P  e.  Q. )  ->  ( E. a  e.  L  E. b  e.  U  b  <Q  ( a  +Q  P
)  ->  E. a  e.  L  ( a  +Q  P )  e.  U
) )
61, 5mpd 13 1  |-  ( (
<. L ,  U >.  e. 
P.  /\  P  e.  Q. )  ->  E. a  e.  L  ( a  +Q  P )  e.  U
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    e. wcel 2200   E.wrex 2509   <.cop 3669   class class class wbr 4083  (class class class)co 6001   Q.cnq 7467    +Q cplq 7469    <Q cltq 7472   P.cnp 7478
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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4199  ax-sep 4202  ax-nul 4210  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-iinf 4680
This theorem depends on definitions:  df-bi 117  df-dc 840  df-3or 1003  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-tr 4183  df-eprel 4380  df-id 4384  df-po 4387  df-iso 4388  df-iord 4457  df-on 4459  df-suc 4462  df-iom 4683  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-ov 6004  df-oprab 6005  df-mpo 6006  df-1st 6286  df-2nd 6287  df-recs 6451  df-irdg 6516  df-1o 6562  df-2o 6563  df-oadd 6566  df-omul 6567  df-er 6680  df-ec 6682  df-qs 6686  df-ni 7491  df-pli 7492  df-mi 7493  df-lti 7494  df-plpq 7531  df-mpq 7532  df-enq 7534  df-nqqs 7535  df-plqqs 7536  df-mqqs 7537  df-1nqqs 7538  df-rq 7539  df-ltnqqs 7540  df-enq0 7611  df-nq0 7612  df-0nq0 7613  df-plq0 7614  df-mq0 7615  df-inp 7653
This theorem is referenced by:  addcanprleml  7801  addcanprlemu  7802  aptiprleml  7826  aptiprlemu  7827
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