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Theorem 7nn0 9535
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 9421 . 2 7 ∈ ℕ
21nnnn0i 9521 1 7 ∈ ℕ0
Colors of variables: wff set class
Syntax hints:  wcel 2205  7c7 9310  0cn0 9513
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 2216  ax-sep 4233  ax-cnex 8234  ax-resscn 8235  ax-1re 8237  ax-addrcl 8240
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-un 3218  df-in 3220  df-ss 3227  df-sn 3700  df-pr 3701  df-op 3703  df-uni 3920  df-int 3955  df-br 4115  df-iota 5317  df-fv 5365  df-ov 6061  df-inn 9255  df-2 9313  df-3 9314  df-4 9315  df-5 9316  df-6 9317  df-7 9318  df-n0 9514
This theorem is referenced by:  7p4e11  9802  7p5e12  9803  7p6e13  9804  7p7e14  9805  8p8e16  9812  9p8e17  9819  9p9e18  9820  7t3e21  9836  7t4e28  9837  7t5e35  9838  7t6e42  9839  7t7e49  9840  8t8e64  9847  9t3e27  9849  9t4e36  9850  9t8e72  9854  9t9e81  9855
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