ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  renemnfd Unicode version

Theorem renemnfd 8325
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 8322 . 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 2203    =/= wne 2412   RRcr 8126   -oocmnf 8306
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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2214  ax-setind 4659  ax-cnex 8218  ax-resscn 8219
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-v 2815  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-uni 3915  df-pnf 8310  df-mnf 8311
This theorem is referenced by:  xnn0nemnf  9574  xaddnemnf  10190  xposdif  10215  xleaddadd  10220  xrbdtri  11961
  Copyright terms: Public domain W3C validator