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Theorem renemnfd 7941
Description: No real equals minus infinity. (Contributed by Mario Carneiro, 28-May-2016.)
Hypothesis
Ref Expression
rexrd.1  |-  ( ph  ->  A  e.  RR )
Assertion
Ref Expression
renemnfd  |-  ( ph  ->  A  =/= -oo )

Proof of Theorem renemnfd
StepHypRef Expression
1 rexrd.1 . 2  |-  ( ph  ->  A  e.  RR )
2 renemnf 7938 . 2  |-  ( A  e.  RR  ->  A  =/= -oo )
31, 2syl 14 1  |-  ( ph  ->  A  =/= -oo )
Colors of variables: wff set class
Syntax hints:    -> wi 4    e. wcel 2135    =/= wne 2334   RRcr 7743   -oocmnf 7922
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1434  ax-7 1435  ax-gen 1436  ax-ie1 1480  ax-ie2 1481  ax-8 1491  ax-10 1492  ax-11 1493  ax-i12 1494  ax-bndl 1496  ax-4 1497  ax-17 1513  ax-i9 1517  ax-ial 1521  ax-i5r 1522  ax-ext 2146  ax-setind 4508  ax-cnex 7835  ax-resscn 7836
This theorem depends on definitions:  df-bi 116  df-3an 969  df-tru 1345  df-nf 1448  df-sb 1750  df-clab 2151  df-cleq 2157  df-clel 2160  df-nfc 2295  df-ne 2335  df-nel 2430  df-ral 2447  df-v 2723  df-dif 3113  df-un 3115  df-in 3117  df-ss 3124  df-pw 3555  df-sn 3576  df-pr 3577  df-uni 3784  df-pnf 7926  df-mnf 7927
This theorem is referenced by:  xnn0nemnf  9179  xaddnemnf  9784  xposdif  9809  xleaddadd  9814  xrbdtri  11203
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