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Theorem elioore 11322
Description: A member of an open interval of reals is a real. (Contributed by NM, 17-Aug-2008.) (Revised by Mario Carneiro, 3-Nov-2013.)
Assertion
Ref Expression
elioore  |-  ( A  e.  ( B (,) C )  ->  A  e.  RR )

Proof of Theorem elioore
StepHypRef Expression
1 elioo3g 11321 . 2  |-  ( A  e.  ( B (,) C )  <->  ( ( B  e.  RR*  /\  C  e.  RR*  /\  A  e. 
RR* )  /\  ( B  <  A  /\  A  <  C ) ) )
2 3ancomb 974 . . 3  |-  ( ( B  e.  RR*  /\  C  e.  RR*  /\  A  e. 
RR* )  <->  ( B  e.  RR*  /\  A  e. 
RR*  /\  C  e.  RR* ) )
3 xrre2 11134 . . 3  |-  ( ( ( B  e.  RR*  /\  A  e.  RR*  /\  C  e.  RR* )  /\  ( B  <  A  /\  A  <  C ) )  ->  A  e.  RR )
42, 3sylanb 472 . 2  |-  ( ( ( B  e.  RR*  /\  C  e.  RR*  /\  A  e.  RR* )  /\  ( B  <  A  /\  A  <  C ) )  ->  A  e.  RR )
51, 4sylbi 195 1  |-  ( A  e.  ( B (,) C )  ->  A  e.  RR )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 369    /\ w3a 965    e. wcel 1756   class class class wbr 4287  (class class class)co 6086   RRcr 9273   RR*cxr 9409    < clt 9410   (,)cioo 11292
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1591  ax-4 1602  ax-5 1670  ax-6 1708  ax-7 1728  ax-8 1758  ax-9 1760  ax-10 1775  ax-11 1780  ax-12 1792  ax-13 1943  ax-ext 2419  ax-sep 4408  ax-nul 4416  ax-pow 4465  ax-pr 4526  ax-un 6367  ax-cnex 9330  ax-resscn 9331  ax-pre-lttri 9348  ax-pre-lttrn 9349
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3or 966  df-3an 967  df-tru 1372  df-ex 1587  df-nf 1590  df-sb 1701  df-eu 2256  df-mo 2257  df-clab 2425  df-cleq 2431  df-clel 2434  df-nfc 2563  df-ne 2603  df-nel 2604  df-ral 2715  df-rex 2716  df-rab 2719  df-v 2969  df-sbc 3182  df-csb 3284  df-dif 3326  df-un 3328  df-in 3330  df-ss 3337  df-nul 3633  df-if 3787  df-pw 3857  df-sn 3873  df-pr 3875  df-op 3879  df-uni 4087  df-iun 4168  df-br 4288  df-opab 4346  df-mpt 4347  df-id 4631  df-po 4636  df-so 4637  df-xp 4841  df-rel 4842  df-cnv 4843  df-co 4844  df-dm 4845  df-rn 4846  df-res 4847  df-ima 4848  df-iota 5376  df-fun 5415  df-fn 5416  df-f 5417  df-f1 5418  df-fo 5419  df-f1o 5420  df-fv 5421  df-ov 6089  df-oprab 6090  df-mpt2 6091  df-1st 6572  df-2nd 6573  df-er 7093  df-en 7303  df-dom 7304  df-sdom 7305  df-pnf 9412  df-mnf 9413  df-xr 9414  df-ltxr 9415  df-le 9416  df-ioo 11296
This theorem is referenced by:  iooval2  11325  elioo4g  11348  ioossre  11349  tgioo  20348  zcld  20365  ioorcl2  21027  lhop2  21462  dvcvx  21467  pilem2  21892  pilem3  21893  pire  21896  tanrpcl  21941  tangtx  21942  tanabsge  21943  sinq34lt0t  21946  cosq14gt0  21947  sineq0  21958  cosne0  21961  tanord  21969  divlogrlim  22055  logno1  22056  logccv  22083  angpieqvd  22201  asinsin  22262  reasinsin  22266  scvxcvx  22354  basellem3  22395  basellem8  22400  vmalogdivsum2  22762  vmalogdivsum  22763  2vmadivsumlem  22764  selberg3lem1  22781  selberg3  22783  selberg4lem1  22784  selberg4  22785  selberg3r  22793  selberg4r  22794  selberg34r  22795  pntrlog2bndlem1  22801  pntrlog2bndlem2  22802  pntrlog2bndlem3  22803  pntrlog2bndlem4  22804  pntrlog2bndlem5  22805  pntrlog2bndlem6a  22806  pntrlog2bndlem6  22807  pntpbnd  22812  pntibndlem3  22816  pntibnd  22817  tan2h  28377  dvtanlem  28394  itg2gt0cn  28400  itggt0cn  28417  ftc1cnnclem  28418  ftc1cnnc  28419  ftc1anclem7  28426  ftc1anclem8  28427  ftc1anc  28428  dvasin  28433  areacirclem1  28437  areacirc  28442  wallispilem1  29813
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