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Theorem mnflt0 10009
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 8169 . 2  |-  0  e.  RR
2 mnflt 10008 . 2  |-  ( 0  e.  RR  -> -oo  <  0 )
31, 2ax-mp 5 1  |- -oo  <  0
Colors of variables: wff set class
Syntax hints:    e. wcel 2200   class class class wbr 4086   RRcr 8021   0cc0 8022   -oocmnf 8202    < clt 8204
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4205  ax-pow 4262  ax-pr 4297  ax-un 4528  ax-cnex 8113  ax-1re 8116  ax-addrcl 8119  ax-rnegex 8131
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2802  df-un 3202  df-in 3204  df-ss 3211  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-br 4087  df-opab 4149  df-xp 4729  df-pnf 8206  df-mnf 8207  df-xr 8208  df-ltxr 8209
This theorem is referenced by:  ge0gtmnf  10048  xsubge0  10106
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