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Theorem nnnn0i 9582
Description: A positive integer is a nonnegative integer. (Contributed by NM, 20-Jun-2005.)
Hypothesis
Ref Expression
nnnn0.1  |-  N  e.  NN
Assertion
Ref Expression
nnnn0i  |-  N  e. 
NN0

Proof of Theorem nnnn0i
StepHypRef Expression
1 nnnn0.1 . 2  |-  N  e.  NN
2 nnnn0 9581 . 2  |-  ( N  e.  NN  ->  N  e.  NN0 )
31, 2ax-mp 5 1  |-  N  e. 
NN0
Colors of variables:    wff set class
This proof depends on syntax axioms:    e. wcel 2209   NNcn 9313   NN0cn0 9574
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  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-ext 2220
This proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-n0 9575
This theorem is used by:  1nn0  9590  2nn0  9591  3nn0  9592  4nn0  9593  5nn0  9594  6nn0  9595  7nn0  9596  8nn0  9597  9nn0  9598  numlt  9817  declei  9828  numlti  9829  pockthi  13166  dec5dvds2  13221  modxp1i  13226  mod2xnegi  13227  43prm  13265  317prm  13269  ballotfilem1  13278  ballotfilemfmpn  13292  ballotfilemth  13339  log2ublem2  16222
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