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Theorem elioomnf 9981
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 8027 . . 3  |- -oo  e.  RR*
2 elioo2 9934 . . 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 981 . . 3  |-  ( ( B  e.  RR  /\ -oo 
<  B  /\  B  < 
A )  <->  ( ( B  e.  RR  /\ -oo  <  B )  /\  B  <  A ) )
6 mnflt 9796 . . . . 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 979    e. wcel 2158   class class class wbr 4015  (class class class)co 5888   RRcr 7823   -oocmnf 8003   RR*cxr 8004    < clt 8005   (,)cioo 9901
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 1457  ax-7 1458  ax-gen 1459  ax-ie1 1503  ax-ie2 1504  ax-8 1514  ax-10 1515  ax-11 1516  ax-i12 1517  ax-bndl 1519  ax-4 1520  ax-17 1536  ax-i9 1540  ax-ial 1544  ax-i5r 1545  ax-13 2160  ax-14 2161  ax-ext 2169  ax-sep 4133  ax-pow 4186  ax-pr 4221  ax-un 4445  ax-setind 4548  ax-cnex 7915  ax-resscn 7916  ax-pre-ltirr 7936  ax-pre-ltwlin 7937  ax-pre-lttrn 7938
This theorem depends on definitions:  df-bi 117  df-3or 980  df-3an 981  df-tru 1366  df-fal 1369  df-nf 1471  df-sb 1773  df-eu 2039  df-mo 2040  df-clab 2174  df-cleq 2180  df-clel 2183  df-nfc 2318  df-ne 2358  df-nel 2453  df-ral 2470  df-rex 2471  df-rab 2474  df-v 2751  df-sbc 2975  df-dif 3143  df-un 3145  df-in 3147  df-ss 3154  df-pw 3589  df-sn 3610  df-pr 3611  df-op 3613  df-uni 3822  df-br 4016  df-opab 4077  df-id 4305  df-po 4308  df-iso 4309  df-xp 4644  df-rel 4645  df-cnv 4646  df-co 4647  df-dm 4648  df-iota 5190  df-fun 5230  df-fv 5236  df-ov 5891  df-oprab 5892  df-mpo 5893  df-pnf 8007  df-mnf 8008  df-xr 8009  df-ltxr 8010  df-le 8011  df-ioo 9905
This theorem is referenced by:  reopnap  14278
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