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Theorem xnn0xrnemnf 9642
Description: The extended nonnegative integers are extended reals without negative infinity. (Contributed by AV, 10-Dec-2020.)
Assertion
Ref Expression
xnn0xrnemnf  |-  ( A  e. NN0*  ->  ( A  e. 
RR*  /\  A  =/= -oo ) )

Proof of Theorem xnn0xrnemnf
StepHypRef Expression
1 xnn0xr 9635 . 2  |-  ( A  e. NN0*  ->  A  e.  RR* )
2 xnn0nemnf 9641 . 2  |-  ( A  e. NN0*  ->  A  =/= -oo )
31, 2jca 306 1  |-  ( A  e. NN0*  ->  ( A  e. 
RR*  /\  A  =/= -oo ) )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    /\ wa 104    e. wcel 2209    =/= wne 2420   -oocmnf 8358   RR*cxr 8359  NN0*cxnn0 9630
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-un 4578  ax-setind 4684  ax-cnex 8270  ax-resscn 8271  ax-1re 8273  ax-addrcl 8276  ax-rnegex 8288
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  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-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-uni 3936  df-int 3971  df-pnf 8362  df-mnf 8363  df-xr 8364  df-inn 9305  df-n0 9564  df-xnn0 9631
This theorem is used by:  xnn0xadd0  10269  xnn0add4d  10288
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