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Theorem elioomnf 10089
Description: Membership in an unbounded interval of extended reals. (Contributed by Mario Carneiro, 18-Jun-2014.)
Assertion
Ref Expression
elioomnf  |-  ( A  e.  RR*  ->  ( B  e.  ( -oo (,) A )  <->  ( B  e.  RR  /\  B  < 
A ) ) )

Proof of Theorem elioomnf
StepHypRef Expression
1 mnfxr 8128 . . 3  |- -oo  e.  RR*
2 elioo2 10042 . . 3  |-  ( ( -oo  e.  RR*  /\  A  e.  RR* )  ->  ( B  e.  ( -oo (,) A )  <->  ( B  e.  RR  /\ -oo  <  B  /\  B  <  A
) ) )
31, 2mpan 424 . 2  |-  ( A  e.  RR*  ->  ( B  e.  ( -oo (,) A )  <->  ( B  e.  RR  /\ -oo  <  B  /\  B  <  A
) ) )
4 an32 562 . . 3  |-  ( ( ( B  e.  RR  /\ -oo  <  B )  /\  B  <  A )  <->  ( ( B  e.  RR  /\  B  <  A )  /\ -oo  <  B ) )
5 df-3an 982 . . 3  |-  ( ( B  e.  RR  /\ -oo 
<  B  /\  B  < 
A )  <->  ( ( B  e.  RR  /\ -oo  <  B )  /\  B  <  A ) )
6 mnflt 9904 . . . . 5  |-  ( B  e.  RR  -> -oo  <  B )
76adantr 276 . . . 4  |-  ( ( B  e.  RR  /\  B  <  A )  -> -oo  <  B )
87pm4.71i 391 . . 3  |-  ( ( B  e.  RR  /\  B  <  A )  <->  ( ( B  e.  RR  /\  B  <  A )  /\ -oo  <  B ) )
94, 5, 83bitr4i 212 . 2  |-  ( ( B  e.  RR  /\ -oo 
<  B  /\  B  < 
A )  <->  ( B  e.  RR  /\  B  < 
A ) )
103, 9bitrdi 196 1  |-  ( A  e.  RR*  ->  ( B  e.  ( -oo (,) A )  <->  ( B  e.  RR  /\  B  < 
A ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    /\ w3a 980    e. wcel 2175   class class class wbr 4043  (class class class)co 5943   RRcr 7923   -oocmnf 8104   RR*cxr 8105    < clt 8106   (,)cioo 10009
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 615  ax-in2 616  ax-io 710  ax-5 1469  ax-7 1470  ax-gen 1471  ax-ie1 1515  ax-ie2 1516  ax-8 1526  ax-10 1527  ax-11 1528  ax-i12 1529  ax-bndl 1531  ax-4 1532  ax-17 1548  ax-i9 1552  ax-ial 1556  ax-i5r 1557  ax-13 2177  ax-14 2178  ax-ext 2186  ax-sep 4161  ax-pow 4217  ax-pr 4252  ax-un 4479  ax-setind 4584  ax-cnex 8015  ax-resscn 8016  ax-pre-ltirr 8036  ax-pre-ltwlin 8037  ax-pre-lttrn 8038
This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1375  df-fal 1378  df-nf 1483  df-sb 1785  df-eu 2056  df-mo 2057  df-clab 2191  df-cleq 2197  df-clel 2200  df-nfc 2336  df-ne 2376  df-nel 2471  df-ral 2488  df-rex 2489  df-rab 2492  df-v 2773  df-sbc 2998  df-dif 3167  df-un 3169  df-in 3171  df-ss 3178  df-pw 3617  df-sn 3638  df-pr 3639  df-op 3641  df-uni 3850  df-br 4044  df-opab 4105  df-id 4339  df-po 4342  df-iso 4343  df-xp 4680  df-rel 4681  df-cnv 4682  df-co 4683  df-dm 4684  df-iota 5231  df-fun 5272  df-fv 5278  df-ov 5946  df-oprab 5947  df-mpo 5948  df-pnf 8108  df-mnf 8109  df-xr 8110  df-ltxr 8111  df-le 8112  df-ioo 10013
This theorem is referenced by:  reopnap  14989
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