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Theorem ztri3or 9687
Description: Integer trichotomy. (Contributed by Jim Kingdon, 14-Mar-2020.)
Assertion
Ref Expression
ztri3or  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( M  <  N  \/  M  =  N  \/  N  <  M ) )

Proof of Theorem ztri3or
StepHypRef Expression
1 zsubcl 9685 . . 3  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( M  -  N
)  e.  ZZ )
2 ztri3or0 9686 . . 3  |-  ( ( M  -  N )  e.  ZZ  ->  (
( M  -  N
)  <  0  \/  ( M  -  N
)  =  0  \/  0  <  ( M  -  N ) ) )
31, 2syl 14 . 2  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( ( M  -  N )  <  0  \/  ( M  -  N
)  =  0  \/  0  <  ( M  -  N ) ) )
4 zre 9648 . . . . . 6  |-  ( M  e.  ZZ  ->  M  e.  RR )
54adantr 276 . . . . 5  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  M  e.  RR )
6 zre 9648 . . . . . 6  |-  ( N  e.  ZZ  ->  N  e.  RR )
76adantl 277 . . . . 5  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  N  e.  RR )
85, 7posdifd 8860 . . . 4  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( M  <  N  <->  0  <  ( N  -  M ) ) )
97, 5resubcld 8708 . . . . 5  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( N  -  M
)  e.  RR )
109lt0neg2d 8844 . . . 4  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( 0  <  ( N  -  M )  <->  -u ( N  -  M
)  <  0 ) )
117recnd 8354 . . . . . 6  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  N  e.  CC )
125recnd 8354 . . . . . 6  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  M  e.  CC )
1311, 12negsubdi2d 8653 . . . . 5  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  -> 
-u ( N  -  M )  =  ( M  -  N ) )
1413breq1d 4140 . . . 4  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( -u ( N  -  M )  <  0  <->  ( M  -  N )  <  0
) )
158, 10, 143bitrd 214 . . 3  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( M  <  N  <->  ( M  -  N )  <  0 ) )
1612, 11subeq0ad 8647 . . . 4  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( ( M  -  N )  =  0  <-> 
M  =  N ) )
1716bicomd 141 . . 3  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( M  =  N  <-> 
( M  -  N
)  =  0 ) )
187, 5posdifd 8860 . . 3  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( N  <  M  <->  0  <  ( M  -  N ) ) )
1915, 17, 183orbi123d 1352 . 2  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( ( M  < 
N  \/  M  =  N  \/  N  < 
M )  <->  ( ( M  -  N )  <  0  \/  ( M  -  N )  =  0  \/  0  < 
( M  -  N
) ) ) )
203, 19mpbird 167 1  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  ( M  <  N  \/  M  =  N  \/  N  <  M ) )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    /\ wa 104    \/ w3o 1008    = wceq 1402    e. wcel 2209   class class class wbr 4130  (class class class)co 6085   RRcr 8178   0cc0 8179    < clt 8360    - cmin 8497   -ucneg 8498   ZZcz 9644
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  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-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684  ax-cnex 8270  ax-resscn 8271  ax-1cn 8272  ax-1re 8273  ax-icn 8274  ax-addcl 8275  ax-addrcl 8276  ax-mulcl 8277  ax-addcom 8279  ax-addass 8281  ax-distr 8283  ax-i2m1 8284  ax-0lt1 8285  ax-0id 8287  ax-rnegex 8288  ax-cnre 8290  ax-pre-ltirr 8291  ax-pre-ltwlin 8292  ax-pre-lttrn 8293  ax-pre-ltadd 8295
This proof depends on definitions:  df-bi 117  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4131  df-opab 4193  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-iota 5337  df-fun 5379  df-fv 5385  df-riota 6038  df-ov 6088  df-oprab 6089  df-mpo 6090  df-pnf 8362  df-mnf 8363  df-xr 8364  df-ltxr 8365  df-le 8366  df-sub 8499  df-neg 8500  df-inn 9305  df-n0 9564  df-z 9645
This theorem is used by:  zletric  9688  zlelttric  9689  zltnle  9690  zleloe  9691  zapne  9719  zdceq  9720  zdcle  9721  zdclt  9722  uzm1  9953  qtri3or  10675  iseqf1olemkle  10934  iseqf1olemklt  10935  iswrdiz  11311  cvgratz  12299  divalglemeunn  12688  divalglemeuneg  12690  znege1  12956  lgsdilem  16146
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