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Theorem mnflt0 9876
Description: Minus infinity is less than 0 (common case). (Contributed by David A. Wheeler, 8-Dec-2018.)
Assertion
Ref Expression
mnflt0  |- -oo  <  0

Proof of Theorem mnflt0
StepHypRef Expression
1 0re 8043 . 2  |-  0  e.  RR
2 mnflt 9875 . 2  |-  ( 0  e.  RR  -> -oo  <  0 )
31, 2ax-mp 5 1  |- -oo  <  0
Colors of variables: wff set class
Syntax hints:    e. wcel 2167   class class class wbr 4034   RRcr 7895   0cc0 7896   -oocmnf 8076    < clt 8078
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-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4152  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-cnex 7987  ax-1re 7990  ax-addrcl 7993  ax-rnegex 8005
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ral 2480  df-rex 2481  df-v 2765  df-un 3161  df-in 3163  df-ss 3170  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-br 4035  df-opab 4096  df-xp 4670  df-pnf 8080  df-mnf 8081  df-xr 8082  df-ltxr 8083
This theorem is referenced by:  ge0gtmnf  9915  xsubge0  9973
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