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Theorem elznn0nn 9199
Description: Integer property expressed in terms nonnegative integers and positive integers. (Contributed by NM, 10-May-2004.)
Assertion
Ref Expression
elznn0nn  |-  ( N  e.  ZZ  <->  ( N  e.  NN0  \/  ( N  e.  RR  /\  -u N  e.  NN ) ) )

Proof of Theorem elznn0nn
StepHypRef Expression
1 elz 9187 . 2  |-  ( N  e.  ZZ  <->  ( N  e.  RR  /\  ( N  =  0  \/  N  e.  NN  \/  -u N  e.  NN ) ) )
2 andi 808 . . 3  |-  ( ( N  e.  RR  /\  ( ( N  =  0  \/  N  e.  NN )  \/  -u N  e.  NN ) )  <->  ( ( N  e.  RR  /\  ( N  =  0  \/  N  e.  NN )
)  \/  ( N  e.  RR  /\  -u N  e.  NN ) ) )
3 df-3or 968 . . . 4  |-  ( ( N  =  0  \/  N  e.  NN  \/  -u N  e.  NN )  <-> 
( ( N  =  0  \/  N  e.  NN )  \/  -u N  e.  NN ) )
43anbi2i 453 . . 3  |-  ( ( N  e.  RR  /\  ( N  =  0  \/  N  e.  NN  \/  -u N  e.  NN ) )  <->  ( N  e.  RR  /\  ( ( N  =  0  \/  N  e.  NN )  \/  -u N  e.  NN ) ) )
5 nn0re 9117 . . . . . 6  |-  ( N  e.  NN0  ->  N  e.  RR )
65pm4.71ri 390 . . . . 5  |-  ( N  e.  NN0  <->  ( N  e.  RR  /\  N  e. 
NN0 ) )
7 elnn0 9110 . . . . . . 7  |-  ( N  e.  NN0  <->  ( N  e.  NN  \/  N  =  0 ) )
8 orcom 718 . . . . . . 7  |-  ( ( N  e.  NN  \/  N  =  0 )  <-> 
( N  =  0  \/  N  e.  NN ) )
97, 8bitri 183 . . . . . 6  |-  ( N  e.  NN0  <->  ( N  =  0  \/  N  e.  NN ) )
109anbi2i 453 . . . . 5  |-  ( ( N  e.  RR  /\  N  e.  NN0 )  <->  ( N  e.  RR  /\  ( N  =  0  \/  N  e.  NN ) ) )
116, 10bitri 183 . . . 4  |-  ( N  e.  NN0  <->  ( N  e.  RR  /\  ( N  =  0  \/  N  e.  NN ) ) )
1211orbi1i 753 . . 3  |-  ( ( N  e.  NN0  \/  ( N  e.  RR  /\  -u N  e.  NN ) )  <->  ( ( N  e.  RR  /\  ( N  =  0  \/  N  e.  NN )
)  \/  ( N  e.  RR  /\  -u N  e.  NN ) ) )
132, 4, 123bitr4i 211 . 2  |-  ( ( N  e.  RR  /\  ( N  =  0  \/  N  e.  NN  \/  -u N  e.  NN ) )  <->  ( N  e.  NN0  \/  ( N  e.  RR  /\  -u N  e.  NN ) ) )
141, 13bitri 183 1  |-  ( N  e.  ZZ  <->  ( N  e.  NN0  \/  ( N  e.  RR  /\  -u N  e.  NN ) ) )
Colors of variables: wff set class
Syntax hints:    /\ wa 103    <-> wb 104    \/ wo 698    \/ w3o 966    = wceq 1342    e. wcel 2135   RRcr 7746   0cc0 7747   -ucneg 8064   NNcn 8851   NN0cn0 9108   ZZcz 9185
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1434  ax-7 1435  ax-gen 1436  ax-ie1 1480  ax-ie2 1481  ax-8 1491  ax-10 1492  ax-11 1493  ax-i12 1494  ax-bndl 1496  ax-4 1497  ax-17 1513  ax-i9 1517  ax-ial 1521  ax-i5r 1522  ax-ext 2146  ax-sep 4097  ax-cnex 7838  ax-resscn 7839  ax-1cn 7840  ax-1re 7841  ax-icn 7842  ax-addcl 7843  ax-addrcl 7844  ax-mulcl 7845  ax-i2m1 7852  ax-rnegex 7856
This theorem depends on definitions:  df-bi 116  df-3or 968  df-3an 969  df-tru 1345  df-nf 1448  df-sb 1750  df-clab 2151  df-cleq 2157  df-clel 2160  df-nfc 2295  df-ral 2447  df-rex 2448  df-rab 2451  df-v 2726  df-un 3118  df-in 3120  df-ss 3127  df-sn 3579  df-pr 3580  df-op 3582  df-uni 3787  df-int 3822  df-br 3980  df-iota 5150  df-fv 5193  df-ov 5842  df-neg 8066  df-inn 8852  df-n0 9109  df-z 9186
This theorem is referenced by:  peano2z  9221  zindd  9303  expcl2lemap  10461  mulexpzap  10489  expaddzap  10493  expmulzap  10495  absexpzap  11016  pcid  12249
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