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Theorem 7nn0 9387
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 9273 . 2 7 ∈ ℕ
21nnnn0i 9373 1 7 ∈ ℕ0
Colors of variables: wff set class
Syntax hints:  wcel 2200  7c7 9162  0cn0 9365
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211  ax-sep 4201  ax-cnex 8086  ax-resscn 8087  ax-1re 8089  ax-addrcl 8092
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2801  df-un 3201  df-in 3203  df-ss 3210  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-int 3923  df-br 4083  df-iota 5277  df-fv 5325  df-ov 6003  df-inn 9107  df-2 9165  df-3 9166  df-4 9167  df-5 9168  df-6 9169  df-7 9170  df-n0 9366
This theorem is referenced by:  7p4e11  9649  7p5e12  9650  7p6e13  9651  7p7e14  9652  8p8e16  9659  9p8e17  9666  9p9e18  9667  7t3e21  9683  7t4e28  9684  7t5e35  9685  7t6e42  9686  7t7e49  9687  8t8e64  9694  9t3e27  9696  9t4e36  9697  9t8e72  9701  9t9e81  9702
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