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Theorem nn0rei 9251
Description: A nonnegative integer is a real number. (Contributed by NM, 14-May-2003.)
Hypothesis
Ref Expression
nn0re.1  |-  A  e. 
NN0
Assertion
Ref Expression
nn0rei  |-  A  e.  RR

Proof of Theorem nn0rei
StepHypRef Expression
1 nn0ssre 9244 . 2  |-  NN0  C_  RR
2 nn0re.1 . 2  |-  A  e. 
NN0
31, 2sselii 3176 1  |-  A  e.  RR
Colors of variables: wff set class
Syntax hints:    e. wcel 2164   RRcr 7871   NN0cn0 9240
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 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2175  ax-sep 4147  ax-cnex 7963  ax-resscn 7964  ax-1re 7966  ax-addrcl 7969  ax-rnegex 7981
This theorem depends on definitions:  df-bi 117  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ral 2477  df-rex 2478  df-v 2762  df-un 3157  df-in 3159  df-ss 3166  df-sn 3624  df-int 3871  df-inn 8983  df-n0 9241
This theorem is referenced by:  nn0cni  9252  nn0le2xi  9290  nn0lele2xi  9291  numlt  9472  numltc  9473  decle  9481  decleh  9482
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