Theorem nn0rei 9418

Description: A nonnegative integer is a real number. (Contributed by NM, 14-May-2003.)

Hypothesis

Ref	Expression
nn0re.1	⊢ 𝐴 ∈ ℕ0

Assertion

Ref	Expression
nn0rei	⊢ 𝐴 ∈ ℝ

Proof of Theorem nn0rei

Step	Hyp	Ref	Expression
1		nn0ssre 9411	. 2 ⊢ ℕ0 ⊆ ℝ
2		nn0re.1	. 2 ⊢ 𝐴 ∈ ℕ0
3	1, 2	sselii 3223	1 ⊢ 𝐴 ∈ ℝ

Syntax hints:   ∈ wcel 2201  ℝcr 8036  ℕ₀cn0 9407

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2212  ax-sep 4208  ax-cnex 8128  ax-resscn 8129  ax-1re 8131  ax-addrcl 8134  ax-rnegex 8146

This theorem depends on definitions:  df-bi 117  df-tru 1400  df-nf 1509  df-sb 1810  df-clab 2217  df-cleq 2223  df-clel 2226  df-nfc 2362  df-ral 2514  df-rex 2515  df-v 2803  df-un 3203  df-in 3205  df-ss 3212  df-sn 3676  df-int 3930  df-inn 9149  df-n0 9408

This theorem is referenced by:  nn0cni  9419  nn0le2xi  9457  nn0lele2xi  9458  numlt  9640  numltc  9641  decle  9649  decleh  9650  modsubi  13015