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Theorem nn0split 10470
Description: Express the set of nonnegative integers as the disjoint (see nn0disj 10472) union of the first  N  +  1 values and the rest. (Contributed by AV, 8-Nov-2019.)
Assertion
Ref Expression
nn0split  |-  ( N  e.  NN0  ->  NN0  =  ( ( 0 ... N )  u.  ( ZZ>=
`  ( N  + 
1 ) ) ) )

Proof of Theorem nn0split
StepHypRef Expression
1 nn0uz 9889 . . 3  |-  NN0  =  ( ZZ>= `  0 )
21a1i 9 . 2  |-  ( N  e.  NN0  ->  NN0  =  ( ZZ>= `  0 )
)
3 peano2nn0 9536 . . . 4  |-  ( N  e.  NN0  ->  ( N  +  1 )  e. 
NN0 )
43, 1eleqtrdi 2325 . . 3  |-  ( N  e.  NN0  ->  ( N  +  1 )  e.  ( ZZ>= `  0 )
)
5 uzsplit 10426 . . 3  |-  ( ( N  +  1 )  e.  ( ZZ>= `  0
)  ->  ( ZZ>= ` 
0 )  =  ( ( 0 ... (
( N  +  1 )  -  1 ) )  u.  ( ZZ>= `  ( N  +  1
) ) ) )
64, 5syl 14 . 2  |-  ( N  e.  NN0  ->  ( ZZ>= ` 
0 )  =  ( ( 0 ... (
( N  +  1 )  -  1 ) )  u.  ( ZZ>= `  ( N  +  1
) ) ) )
7 nn0cn 9506 . . . . 5  |-  ( N  e.  NN0  ->  N  e.  CC )
8 pncan1 8650 . . . . 5  |-  ( N  e.  CC  ->  (
( N  +  1 )  -  1 )  =  N )
97, 8syl 14 . . . 4  |-  ( N  e.  NN0  ->  ( ( N  +  1 )  -  1 )  =  N )
109oveq2d 6066 . . 3  |-  ( N  e.  NN0  ->  ( 0 ... ( ( N  +  1 )  - 
1 ) )  =  ( 0 ... N
) )
1110uneq1d 3372 . 2  |-  ( N  e.  NN0  ->  ( ( 0 ... ( ( N  +  1 )  -  1 ) )  u.  ( ZZ>= `  ( N  +  1 ) ) )  =  ( ( 0 ... N
)  u.  ( ZZ>= `  ( N  +  1
) ) ) )
122, 6, 113eqtrd 2269 1  |-  ( N  e.  NN0  ->  NN0  =  ( ( 0 ... N )  u.  ( ZZ>=
`  ( N  + 
1 ) ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1398    e. wcel 2203    u. cun 3209   ` cfv 5352  (class class class)co 6050   CCcc 8125   0cc0 8127   1c1 8128    + caddc 8130    - cmin 8444   NN0cn0 9496   ZZ>=cuz 9853   ...cfz 10342
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-in1 619  ax-in2 620  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-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-setind 4659  ax-cnex 8218  ax-resscn 8219  ax-1cn 8220  ax-1re 8221  ax-icn 8222  ax-addcl 8223  ax-addrcl 8224  ax-mulcl 8225  ax-addcom 8227  ax-addass 8229  ax-distr 8231  ax-i2m1 8232  ax-0lt1 8233  ax-0id 8235  ax-rnegex 8236  ax-cnre 8238  ax-pre-ltirr 8239  ax-pre-ltwlin 8240  ax-pre-lttrn 8241  ax-pre-ltadd 8243
This theorem depends on definitions:  df-bi 117  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2815  df-sbc 3043  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-br 4110  df-opab 4172  df-mpt 4173  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-iota 5312  df-fun 5354  df-fn 5355  df-f 5356  df-fv 5360  df-riota 6003  df-ov 6053  df-oprab 6054  df-mpo 6055  df-pnf 8310  df-mnf 8311  df-xr 8312  df-ltxr 8313  df-le 8314  df-sub 8446  df-neg 8447  df-inn 9238  df-n0 9497  df-z 9578  df-uz 9854  df-fz 10343
This theorem is referenced by:  plycoeid3  15622
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