Theorem resunimafz0 10351

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

Step	Hyp	Ref	Expression
1		imaundi 4877	. . . . 5 |- ( F " ( ( 0..^ N ) u. { N } ) ) = ( ( F " ( 0..^ N ) ) u. ( F " { N } ) )
2		resunimafz0.n	. . . . . . . . 9 |- ( ph -> N e. ( 0..^ (♯ ` F ) ) )
3		elfzonn0 9746	. . . . . . . . 9 |- ( N e. ( 0..^ (♯ ` F ) ) -> N e. NN0 )
4	2, 3	syl 14	. . . . . . . 8 |- ( ph -> N e. NN0 )
5		elnn0uz 9155	. . . . . . . 8 |- ( N e. NN0 <-> N e. ( ZZ>= ` 0 ) )
6	4, 5	sylib 121	. . . . . . 7 |- ( ph -> N e. ( ZZ>= ` 0 ) )
7		fzisfzounsn 9796	. . . . . . 7 |- ( N e. ( ZZ>= ` 0 ) -> ( 0 ... N ) = ( ( 0..^ N ) u. { N } ) )
8	6, 7	syl 14	. . . . . 6 |- ( ph -> ( 0 ... N ) = ( ( 0..^ N ) u. { N } ) )
9	8	imaeq2d 4807	. . . . 5 |- ( ph -> ( F " ( 0 ... N ) ) = ( F " ( ( 0..^ N ) u. { N } ) ) )
10		resunimafz0.f	. . . . . . . 8 |- ( ph -> F : ( 0..^ (♯ ` F ) ) --> dom I )
11	10	ffnd 5196	. . . . . . 7 |- ( ph -> F Fn ( 0..^ (♯ ` F ) ) )
12		fnsnfv 5398	. . . . . . 7 |- ( ( F Fn ( 0..^ (♯ ` F ) ) /\ N e. ( 0..^ (♯ ` F ) ) ) -> { ( F ` N ) } = ( F " { N } ) )
13	11, 2, 12	syl2anc 404	. . . . . 6 |- ( ph -> { ( F ` N ) } = ( F " { N } ) )
14	13	uneq2d 3169	. . . . 5 |- ( ph -> ( ( F " ( 0..^ N ) ) u. { ( F ` N ) } ) = ( ( F " ( 0..^ N ) ) u. ( F " { N } ) ) )
15	1, 9, 14	3eqtr4a 2153	. . . 4 |- ( ph -> ( F " ( 0 ... N ) ) = ( ( F " ( 0..^ N ) ) u. { ( F ` N ) } ) )
16	15	reseq2d 4745	. . 3 |- ( ph -> ( I |` ( F " ( 0 ... N ) ) ) = ( I |` ( ( F " ( 0..^ N ) ) u. { ( F ` N ) } ) ) )
17		resundi 4758	. . 3 |- ( I |` ( ( F " ( 0..^ N ) ) u. { ( F ` N ) } ) ) = ( ( I |` ( F " ( 0..^ N ) ) ) u. ( I |` { ( F ` N ) } ) )
18	16, 17	syl6eq 2143	. 2 |- ( ph -> ( I |` ( F " ( 0 ... N ) ) ) = ( ( I |` ( F " ( 0..^ N ) ) ) u. ( I |` { ( F ` N ) } ) ) )
19		resunimafz0.i	. . . . 5 |- ( ph -> Fun I )
20		funfn 5079	. . . . 5 |- ( Fun I <-> I Fn dom I )
21	19, 20	sylib 121	. . . 4 |- ( ph -> I Fn dom I )
22	10, 2	ffvelrnd 5474	. . . 4 |- ( ph -> ( F ` N ) e. dom I )
23		fnressn 5522	. . . 4 |- ( ( I Fn dom I /\ ( F ` N ) e. dom I ) -> ( I |` { ( F ` N ) } ) = { <. ( F ` N ) , ( I ` ( F ` N ) ) >. } )
24	21, 22, 23	syl2anc 404	. . 3 |- ( ph -> ( I |` { ( F ` N ) } ) = { <. ( F ` N ) , ( I ` ( F ` N ) ) >. } )
25	24	uneq2d 3169	. 2 |- ( ph -> ( ( I |` ( F " ( 0..^ N ) ) ) u. ( I |` { ( F ` N ) } ) ) = ( ( I |` ( F " ( 0..^ N ) ) ) u. { <. ( F ` N ) , ( I ` ( F ` N ) ) >. } ) )
26	18, 25	eqtrd 2127	1 |- ( ph -> ( I |` ( F " ( 0 ... N ) ) ) = ( ( I |` ( F " ( 0..^ N ) ) ) u. { <. ( F ` N ) , ( I ` ( F ` N ) ) >. } ) )

Syntax hints:   -> wi 4   = wceq 1296   e. wcel 1445   u. cun 3011   {csn 3466   <.cop 3469   dom cdm 4467   |` cres 4469   "cima 4470   Fun wfun 5043   Fn wfn 5044   -->wf 5045   ` cfv 5049  (class class class)co 5690   0cc0 7447   NN0cn0 8771   ZZ>=cuz 9118   ...cfz 9573  ..^cfzo 9702  ♯chash 10298

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 582  ax-in2 583  ax-io 668  ax-5 1388  ax-7 1389  ax-gen 1390  ax-ie1 1434  ax-ie2 1435  ax-8 1447  ax-10 1448  ax-11 1449  ax-i12 1450  ax-bndl 1451  ax-4 1452  ax-13 1456  ax-14 1457  ax-17 1471  ax-i9 1475  ax-ial 1479  ax-i5r 1480  ax-ext 2077  ax-sep 3978  ax-pow 4030  ax-pr 4060  ax-un 4284  ax-setind 4381  ax-cnex 7533  ax-resscn 7534  ax-1cn 7535  ax-1re 7536  ax-icn 7537  ax-addcl 7538  ax-addrcl 7539  ax-mulcl 7540  ax-addcom 7542  ax-addass 7544  ax-distr 7546  ax-i2m1 7547  ax-0lt1 7548  ax-0id 7550  ax-rnegex 7551  ax-cnre 7553  ax-pre-ltirr 7554  ax-pre-ltwlin 7555  ax-pre-lttrn 7556  ax-pre-apti 7557  ax-pre-ltadd 7558

This theorem depends on definitions:  df-bi 116  df-3or 928  df-3an 929  df-tru 1299  df-fal 1302  df-nf 1402  df-sb 1700  df-eu 1958  df-mo 1959  df-clab 2082  df-cleq 2088  df-clel 2091  df-nfc 2224  df-ne 2263  df-nel 2358  df-ral 2375  df-rex 2376  df-reu 2377  df-rab 2379  df-v 2635  df-sbc 2855  df-csb 2948  df-dif 3015  df-un 3017  df-in 3019  df-ss 3026  df-pw 3451  df-sn 3472  df-pr 3473  df-op 3475  df-uni 3676  df-int 3711  df-iun 3754  df-br 3868  df-opab 3922  df-mpt 3923  df-id 4144  df-xp 4473  df-rel 4474  df-cnv 4475  df-co 4476  df-dm 4477  df-rn 4478  df-res 4479  df-ima 4480  df-iota 5014  df-fun 5051  df-fn 5052  df-f 5053  df-f1 5054  df-fo 5055  df-f1o 5056  df-fv 5057  df-riota 5646  df-ov 5693  df-oprab 5694  df-mpt2 5695  df-1st 5949  df-2nd 5950  df-pnf 7621  df-mnf 7622  df-xr 7623  df-ltxr 7624  df-le 7625  df-sub 7752  df-neg 7753  df-inn 8521  df-n0 8772  df-z 8849  df-uz 9119  df-fz 9574  df-fzo 9703

This theorem is referenced by: (None)