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Theorem elioomnf 10370
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 8382 . . 3  |- -oo  e.  RR*
2 elioo2 10323 . . 3  |-  ( ( -oo  e.  RR*  /\  A  e.  RR* )  ->  ( B  e.  ( -oo (,) A )  <->  ( B  e.  RR  /\ -oo  <  B  /\  B  <  A
) ) )
31, 2mpan 428 . 2  |-  ( A  e.  RR*  ->  ( B  e.  ( -oo (,) A )  <->  ( B  e.  RR  /\ -oo  <  B  /\  B  <  A
) ) )
4 an32 568 . . 3  |-  ( ( ( B  e.  RR  /\ -oo  <  B )  /\  B  <  A )  <->  ( ( B  e.  RR  /\  B  <  A )  /\ -oo  <  B ) )
5 df-3an 1011 . . 3  |-  ( ( B  e.  RR  /\ -oo 
<  B  /\  B  < 
A )  <->  ( ( B  e.  RR  /\ -oo  <  B )  /\  B  <  A ) )
6 mnflt 10185 . . . . 5  |-  ( B  e.  RR  -> -oo  <  B )
76adantr 276 . . . 4  |-  ( ( B  e.  RR  /\  B  <  A )  -> -oo  <  B )
87pm4.71i 395 . . 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
This proof depends on syntax axioms:    -> wi 4    /\ wa 104    <-> wb 105    /\ w3a 1009    e. wcel 2209   class class class wbr 4130  (class class class)co 6085   RRcr 8178   -oocmnf 8358   RR*cxr 8359    < clt 8360   (,)cioo 10290
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684  ax-cnex 8270  ax-resscn 8271  ax-pre-ltirr 8291  ax-pre-ltwlin 8292  ax-pre-lttrn 8293
This proof depends on definitions:  df-bi 117  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-br 4131  df-opab 4193  df-id 4438  df-po 4441  df-iso 4442  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-iota 5337  df-fun 5379  df-fv 5385  df-ov 6088  df-oprab 6089  df-mpo 6090  df-pnf 8362  df-mnf 8363  df-xr 8364  df-ltxr 8365  df-le 8366  df-ioo 10294
This theorem is used by:  reopnap  15647
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