Theorem nnaddcld 9331

Description: Closure of addition of positive integers. (Contributed by Mario Carneiro, 27-May-2016.)

Hypotheses

Ref	Expression
nnge1d.1	|- ( ph -> A e. NN )
nnmulcld.2	|- ( ph -> B e. NN )

Assertion

Ref	Expression
nnaddcld	|- ( ph -> ( A + B ) e. NN )

Proof of Theorem nnaddcld

Step	Hyp	Ref	Expression
1		nnge1d.1	. 2 |- ( ph -> A e. NN )
2		nnmulcld.2	. 2 |- ( ph -> B e. NN )
3		nnaddcl 9303	. 2 |- ( ( A e. NN /\ B e. NN ) -> ( A + B ) e. NN )
4	1, 2, 3	syl2anc 415	1 |- ( ph -> ( A + B ) e. NN )

Syntax hints:   -> wi 4   e. wcel 2209  (class class class)co 6075   + caddc 8172   NNcn 9283

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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220  ax-sep 4244  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-addrcl 8266  ax-addass 8271

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-br 4126  df-iota 5332  df-fv 5380  df-ov 6078  df-inn 9284

This theorem is referenced by:  pythagtriplem4  13025  pythagtriplem6  13027  pythagtriplem7  13028  pythagtriplem11  13031  pythagtriplem12  13032  pythagtriplem13  13033  pythagtriplem14  13034  pythagtriplem15  13035  pythagtriplem16  13036  ballotfilem5  13220  mulgnndir  13931  perfectlem2  16028  lgseisenlem2  16104