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Theorem 7nn0 9466
Description: 7 is a nonnegative integer. (Contributed by Mario Carneiro, 19-Apr-2015.)
Assertion
Ref Expression
7nn0 7 ∈ ℕ0

Proof of Theorem 7nn0
StepHypRef Expression
1 7nn 9352 . 2 7 ∈ ℕ
21nnnn0i 9452 1 7 ∈ ℕ0
Colors of variables: wff set class
Syntax hints:  wcel 2202  7c7 9241  0cn0 9444
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213  ax-sep 4212  ax-cnex 8166  ax-resscn 8167  ax-1re 8169  ax-addrcl 8172
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-rex 2517  df-v 2805  df-un 3205  df-in 3207  df-ss 3214  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-int 3934  df-br 4094  df-iota 5293  df-fv 5341  df-ov 6031  df-inn 9186  df-2 9244  df-3 9245  df-4 9246  df-5 9247  df-6 9248  df-7 9249  df-n0 9445
This theorem is referenced by:  7p4e11  9730  7p5e12  9731  7p6e13  9732  7p7e14  9733  8p8e16  9740  9p8e17  9747  9p9e18  9748  7t3e21  9764  7t4e28  9765  7t5e35  9766  7t6e42  9767  7t7e49  9768  8t8e64  9775  9t3e27  9777  9t4e36  9778  9t8e72  9782  9t9e81  9783
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