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Theorem icossicc 9095
Description: A closed-below, open-above interval is a subset of its closure. (Contributed by Thierry Arnoux, 25-Oct-2016.)
Assertion
Ref Expression
icossicc  |-  ( A [,) B )  C_  ( A [,] B )

Proof of Theorem icossicc
Dummy variables  a  b  w  x are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-ico 9029 . 2  |-  [,)  =  ( a  e.  RR* ,  b  e.  RR*  |->  { x  e.  RR*  |  ( a  <_  x  /\  x  <  b ) } )
2 df-icc 9030 . 2  |-  [,]  =  ( a  e.  RR* ,  b  e.  RR*  |->  { x  e.  RR*  |  ( a  <_  x  /\  x  <_  b ) } )
3 idd 21 . 2  |-  ( ( A  e.  RR*  /\  w  e.  RR* )  ->  ( A  <_  w  ->  A  <_  w ) )
4 xrltle 8985 . 2  |-  ( ( w  e.  RR*  /\  B  e.  RR* )  ->  (
w  <  B  ->  w  <_  B ) )
51, 2, 3, 4ixxssixx 9037 1  |-  ( A [,) B )  C_  ( A [,] B )
Colors of variables: wff set class
Syntax hints:    /\ wa 102    e. wcel 1434    C_ wss 2983   class class class wbr 3806  (class class class)co 5564   RR*cxr 7250    < clt 7251    <_ cle 7252   [,)cico 9025   [,]cicc 9026
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-in1 577  ax-in2 578  ax-io 663  ax-5 1377  ax-7 1378  ax-gen 1379  ax-ie1 1423  ax-ie2 1424  ax-8 1436  ax-10 1437  ax-11 1438  ax-i12 1439  ax-bndl 1440  ax-4 1441  ax-13 1445  ax-14 1446  ax-17 1460  ax-i9 1464  ax-ial 1468  ax-i5r 1469  ax-ext 2065  ax-sep 3917  ax-pow 3969  ax-pr 3993  ax-un 4217  ax-setind 4309  ax-cnex 7165  ax-resscn 7166  ax-pre-ltirr 7186  ax-pre-lttrn 7188
This theorem depends on definitions:  df-bi 115  df-3or 921  df-3an 922  df-tru 1288  df-fal 1291  df-nf 1391  df-sb 1688  df-eu 1946  df-mo 1947  df-clab 2070  df-cleq 2076  df-clel 2079  df-nfc 2212  df-ne 2250  df-nel 2345  df-ral 2358  df-rex 2359  df-rab 2362  df-v 2612  df-sbc 2826  df-dif 2985  df-un 2987  df-in 2989  df-ss 2996  df-pw 3403  df-sn 3423  df-pr 3424  df-op 3426  df-uni 3623  df-br 3807  df-opab 3861  df-id 4077  df-xp 4398  df-rel 4399  df-cnv 4400  df-co 4401  df-dm 4402  df-iota 4918  df-fun 4955  df-fv 4961  df-ov 5567  df-oprab 5568  df-mpt2 5569  df-pnf 7253  df-mnf 7254  df-xr 7255  df-ltxr 7256  df-le 7257  df-ico 9029  df-icc 9030
This theorem is referenced by: (None)
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