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Theorem resunimafz0 10923
Description: The union of a restriction by an image over an open range of nonnegative integers and a singleton of an ordered pair is a restriction by an image over an interval of nonnegative integers. (Contributed by Mario Carneiro, 8-Apr-2015.) (Revised by AV, 20-Feb-2021.)
Hypotheses
Ref Expression
resunimafz0.i  |-  ( ph  ->  Fun  I )
resunimafz0.f  |-  ( ph  ->  F : ( 0..^ ( `  F )
) --> dom  I )
resunimafz0.n  |-  ( ph  ->  N  e.  ( 0..^ ( `  F )
) )
Assertion
Ref Expression
resunimafz0  |-  ( ph  ->  ( I  |`  ( F " ( 0 ... N ) ) )  =  ( ( I  |`  ( F " (
0..^ N ) ) )  u.  { <. ( F `  N ) ,  ( I `  ( F `  N ) ) >. } ) )

Proof of Theorem resunimafz0
StepHypRef Expression
1 imaundi 5082 . . . . 5  |-  ( F
" ( ( 0..^ N )  u.  { N } ) )  =  ( ( F "
( 0..^ N ) )  u.  ( F
" { N }
) )
2 resunimafz0.n . . . . . . . . 9  |-  ( ph  ->  N  e.  ( 0..^ ( `  F )
) )
3 elfzonn0 10262 . . . . . . . . 9  |-  ( N  e.  ( 0..^ ( `  F ) )  ->  N  e.  NN0 )
42, 3syl 14 . . . . . . . 8  |-  ( ph  ->  N  e.  NN0 )
5 elnn0uz 9639 . . . . . . . 8  |-  ( N  e.  NN0  <->  N  e.  ( ZZ>=
`  0 ) )
64, 5sylib 122 . . . . . . 7  |-  ( ph  ->  N  e.  ( ZZ>= ` 
0 ) )
7 fzisfzounsn 10312 . . . . . . 7  |-  ( N  e.  ( ZZ>= `  0
)  ->  ( 0 ... N )  =  ( ( 0..^ N )  u.  { N } ) )
86, 7syl 14 . . . . . 6  |-  ( ph  ->  ( 0 ... N
)  =  ( ( 0..^ N )  u. 
{ N } ) )
98imaeq2d 5009 . . . . 5  |-  ( ph  ->  ( F " (
0 ... N ) )  =  ( F "
( ( 0..^ N )  u.  { N } ) ) )
10 resunimafz0.f . . . . . . . 8  |-  ( ph  ->  F : ( 0..^ ( `  F )
) --> dom  I )
1110ffnd 5408 . . . . . . 7  |-  ( ph  ->  F  Fn  ( 0..^ ( `  F )
) )
12 fnsnfv 5620 . . . . . . 7  |-  ( ( F  Fn  ( 0..^ ( `  F )
)  /\  N  e.  ( 0..^ ( `  F
) ) )  ->  { ( F `  N ) }  =  ( F " { N } ) )
1311, 2, 12syl2anc 411 . . . . . 6  |-  ( ph  ->  { ( F `  N ) }  =  ( F " { N } ) )
1413uneq2d 3317 . . . . 5  |-  ( ph  ->  ( ( F "
( 0..^ N ) )  u.  { ( F `  N ) } )  =  ( ( F " (
0..^ N ) )  u.  ( F " { N } ) ) )
151, 9, 143eqtr4a 2255 . . . 4  |-  ( ph  ->  ( F " (
0 ... N ) )  =  ( ( F
" ( 0..^ N ) )  u.  {
( F `  N
) } ) )
1615reseq2d 4946 . . 3  |-  ( ph  ->  ( I  |`  ( F " ( 0 ... N ) ) )  =  ( I  |`  ( ( F "
( 0..^ N ) )  u.  { ( F `  N ) } ) ) )
17 resundi 4959 . . 3  |-  ( I  |`  ( ( F "
( 0..^ N ) )  u.  { ( F `  N ) } ) )  =  ( ( I  |`  ( F " ( 0..^ N ) ) )  u.  ( I  |`  { ( F `  N ) } ) )
1816, 17eqtrdi 2245 . 2  |-  ( ph  ->  ( I  |`  ( F " ( 0 ... N ) ) )  =  ( ( I  |`  ( F " (
0..^ N ) ) )  u.  ( I  |`  { ( F `  N ) } ) ) )
19 resunimafz0.i . . . . 5  |-  ( ph  ->  Fun  I )
20 funfn 5288 . . . . 5  |-  ( Fun  I  <->  I  Fn  dom  I )
2119, 20sylib 122 . . . 4  |-  ( ph  ->  I  Fn  dom  I
)
2210, 2ffvelcdmd 5698 . . . 4  |-  ( ph  ->  ( F `  N
)  e.  dom  I
)
23 fnressn 5748 . . . 4  |-  ( ( I  Fn  dom  I  /\  ( F `  N
)  e.  dom  I
)  ->  ( I  |` 
{ ( F `  N ) } )  =  { <. ( F `  N ) ,  ( I `  ( F `  N ) ) >. } )
2421, 22, 23syl2anc 411 . . 3  |-  ( ph  ->  ( I  |`  { ( F `  N ) } )  =  { <. ( F `  N
) ,  ( I `
 ( F `  N ) ) >. } )
2524uneq2d 3317 . 2  |-  ( ph  ->  ( ( I  |`  ( F " ( 0..^ N ) ) )  u.  ( I  |`  { ( F `  N ) } ) )  =  ( ( I  |`  ( F " ( 0..^ N ) ) )  u.  { <. ( F `  N
) ,  ( I `
 ( F `  N ) ) >. } ) )
2618, 25eqtrd 2229 1  |-  ( ph  ->  ( I  |`  ( F " ( 0 ... N ) ) )  =  ( ( I  |`  ( F " (
0..^ N ) ) )  u.  { <. ( F `  N ) ,  ( I `  ( F `  N ) ) >. } ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1364    e. wcel 2167    u. cun 3155   {csn 3622   <.cop 3625   dom cdm 4663    |` cres 4665   "cima 4666   Fun wfun 5252    Fn wfn 5253   -->wf 5254   ` cfv 5258  (class class class)co 5922   0cc0 7879   NN0cn0 9249   ZZ>=cuz 9601   ...cfz 10083  ..^cfzo 10217  ♯chash 10867
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 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4151  ax-pow 4207  ax-pr 4242  ax-un 4468  ax-setind 4573  ax-cnex 7970  ax-resscn 7971  ax-1cn 7972  ax-1re 7973  ax-icn 7974  ax-addcl 7975  ax-addrcl 7976  ax-mulcl 7977  ax-addcom 7979  ax-addass 7981  ax-distr 7983  ax-i2m1 7984  ax-0lt1 7985  ax-0id 7987  ax-rnegex 7988  ax-cnre 7990  ax-pre-ltirr 7991  ax-pre-ltwlin 7992  ax-pre-lttrn 7993  ax-pre-apti 7994  ax-pre-ltadd 7995
This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-int 3875  df-iun 3918  df-br 4034  df-opab 4095  df-mpt 4096  df-id 4328  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-rn 4674  df-res 4675  df-ima 4676  df-iota 5219  df-fun 5260  df-fn 5261  df-f 5262  df-f1 5263  df-fo 5264  df-f1o 5265  df-fv 5266  df-riota 5877  df-ov 5925  df-oprab 5926  df-mpo 5927  df-1st 6198  df-2nd 6199  df-pnf 8063  df-mnf 8064  df-xr 8065  df-ltxr 8066  df-le 8067  df-sub 8199  df-neg 8200  df-inn 8991  df-n0 9250  df-z 9327  df-uz 9602  df-fz 10084  df-fzo 10218
This theorem is referenced by: (None)
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