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Theorem 7nn0 9424
Description: 7 is a nonnegative integer. (Contributed by Mario Carneiro, 19-Apr-2015.)
Assertion
Ref Expression
7nn0  |-  7  e.  NN0

Proof of Theorem 7nn0
StepHypRef Expression
1 7nn 9310 . 2  |-  7  e.  NN
21nnnn0i 9410 1  |-  7  e.  NN0
Colors of variables: wff set class
Syntax hints:    e. wcel 2202   7c7 9199   NN0cn0 9402
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 2213  ax-sep 4207  ax-cnex 8123  ax-resscn 8124  ax-1re 8126  ax-addrcl 8129
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-iota 5286  df-fv 5334  df-ov 6021  df-inn 9144  df-2 9202  df-3 9203  df-4 9204  df-5 9205  df-6 9206  df-7 9207  df-n0 9403
This theorem is referenced by:  7p4e11  9686  7p5e12  9687  7p6e13  9688  7p7e14  9689  8p8e16  9696  9p8e17  9703  9p9e18  9704  7t3e21  9720  7t4e28  9721  7t5e35  9722  7t6e42  9723  7t7e49  9724  8t8e64  9731  9t3e27  9733  9t4e36  9734  9t8e72  9738  9t9e81  9739
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