Theorem frec2uzrand 10820

Description: Range of G (see frec2uz0d 10814). (Contributed by Jim Kingdon, 17-May-2020.)

Hypotheses

Ref	Expression
frec2uz.1	|- ( ph -> C e. ZZ )
frec2uz.2	|- G = frec ( ( x e. ZZ |-> ( x + 1 ) ) , C )

Assertion

Ref	Expression
frec2uzrand	|- ( ph -> ran G = ( ZZ>= ` C ) )

Distinct variable groups:   x, C   ph, x

Allowed substitution hint:   G( x)

Proof of Theorem frec2uzrand

Dummy variables w y z are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		frec2uz.1	. 2 |- ( ph -> C e. ZZ )
2		zex 9632	. . . . . . . . . . 11 |- ZZ e. _V
3	2	mptex 5934	. . . . . . . . . 10 |- ( x e. ZZ |-> ( x + 1 ) ) e. _V
4		vex 2824	. . . . . . . . . 10 |- z e. _V
5	3, 4	fvex 5710	. . . . . . . . 9 |- ( ( x e. ZZ |-> ( x + 1 ) ) ` z ) e. _V
6	5	ax-gen 1502	. . . . . . . 8 |- A. z ( ( x e. ZZ |-> ( x + 1 ) ) ` z ) e. _V
7		frecfnom 6662	. . . . . . . 8 |- ( ( A. z ( ( x e. ZZ |-> ( x + 1 ) ) ` z ) e. _V /\ C e. ZZ ) -> frec ( ( x e. ZZ |-> ( x + 1 ) ) , C ) Fn om )
8	6, 7	mpan 428	. . . . . . 7 |- ( C e. ZZ -> frec ( ( x e. ZZ |-> ( x + 1 ) ) , C ) Fn om )
9		frec2uz.2	. . . . . . . 8 |- G = frec ( ( x e. ZZ |-> ( x + 1 ) ) , C )
10	9	fneq1i 5470	. . . . . . 7 |- ( G Fn om <-> frec ( ( x e. ZZ |-> ( x + 1 ) ) , C ) Fn om )
11	8, 10	sylibr 134	. . . . . 6 |- ( C e. ZZ -> G Fn om )
12		fvelrnb 5744	. . . . . 6 |- ( G Fn om -> ( y e. ran G <-> E. z e. om ( G ` z ) = y ) )
13	11, 12	syl 14	. . . . 5 |- ( C e. ZZ -> ( y e. ran G <-> E. z e. om ( G ` z ) = y ) )
14		simpl 109	. . . . . . . 8 |- ( ( C e. ZZ /\ z e. om ) -> C e. ZZ )
15		simpr 110	. . . . . . . 8 |- ( ( C e. ZZ /\ z e. om ) -> z e. om )
16	14, 9, 15	frec2uzuzd 10817	. . . . . . 7 |- ( ( C e. ZZ /\ z e. om ) -> ( G ` z ) e. ( ZZ>= ` C ) )
17		eleq1 2301	. . . . . . 7 |- ( ( G ` z ) = y -> ( ( G ` z ) e. ( ZZ>= ` C ) <-> y e. ( ZZ>= ` C ) ) )
18	16, 17	syl5ibcom 155	. . . . . 6 |- ( ( C e. ZZ /\ z e. om ) -> ( ( G ` z ) = y -> y e. ( ZZ>= ` C ) ) )
19	18	rexlimdva 2668	. . . . 5 |- ( C e. ZZ -> ( E. z e. om ( G ` z ) = y -> y e. ( ZZ>= ` C ) ) )
20	13, 19	sylbid 150	. . . 4 |- ( C e. ZZ -> ( y e. ran G -> y e. ( ZZ>= ` C ) ) )
21		eleq1 2301	. . . . 5 |- ( w = C -> ( w e. ran G <-> C e. ran G ) )
22		eleq1 2301	. . . . 5 |- ( w = y -> ( w e. ran G <-> y e. ran G ) )
23		eleq1 2301	. . . . 5 |- ( w = ( y + 1 ) -> ( w e. ran G <-> ( y + 1 ) e. ran G ) )
24		id 19	. . . . . . 7 |- ( C e. ZZ -> C e. ZZ )
25	24, 9	frec2uz0d 10814	. . . . . 6 |- ( C e. ZZ -> ( G ` (/) ) = C )
26		peano1 4736	. . . . . . 7 |- (/) e. om
27		fnfvelrn 5831	. . . . . . 7 |- ( ( G Fn om /\ (/) e. om ) -> ( G ` (/) ) e. ran G )
28	11, 26, 27	sylancl 417	. . . . . 6 |- ( C e. ZZ -> ( G ` (/) ) e. ran G )
29	25, 28	eqeltrrd 2316	. . . . 5 |- ( C e. ZZ -> C e. ran G )
30		eluzel2 9905	. . . . . 6 |- ( y e. ( ZZ>= ` C ) -> C e. ZZ )
31	14, 9, 15	frec2uzsucd 10816	. . . . . . . . . . 11 |- ( ( C e. ZZ /\ z e. om ) -> ( G ` suc z ) = ( ( G ` z ) + 1 ) )
32		oveq1 6082	. . . . . . . . . . 11 |- ( ( G ` z ) = y -> ( ( G ` z ) + 1 ) = ( y + 1 ) )
33	31, 32	sylan9eq 2291	. . . . . . . . . 10 |- ( ( ( C e. ZZ /\ z e. om ) /\ ( G ` z ) = y ) -> ( G ` suc z ) = ( y + 1 ) )
34		peano2 4737	. . . . . . . . . . . 12 |- ( z e. om -> suc z e. om )
35		fnfvelrn 5831	. . . . . . . . . . . 12 |- ( ( G Fn om /\ suc z e. om ) -> ( G ` suc z ) e. ran G )
36	11, 34, 35	syl2an 289	. . . . . . . . . . 11 |- ( ( C e. ZZ /\ z e. om ) -> ( G ` suc z ) e. ran G )
37	36	adantr 276	. . . . . . . . . 10 |- ( ( ( C e. ZZ /\ z e. om ) /\ ( G ` z ) = y ) -> ( G ` suc z ) e. ran G )
38	33, 37	eqeltrrd 2316	. . . . . . . . 9 |- ( ( ( C e. ZZ /\ z e. om ) /\ ( G ` z ) = y ) -> ( y + 1 ) e. ran G )
39	38	ex 115	. . . . . . . 8 |- ( ( C e. ZZ /\ z e. om ) -> ( ( G ` z ) = y -> ( y + 1 ) e. ran G ) )
40	39	rexlimdva 2668	. . . . . . 7 |- ( C e. ZZ -> ( E. z e. om ( G ` z ) = y -> ( y + 1 ) e. ran G ) )
41	13, 40	sylbid 150	. . . . . 6 |- ( C e. ZZ -> ( y e. ran G -> ( y + 1 ) e. ran G ) )
42	30, 41	syl 14	. . . . 5 |- ( y e. ( ZZ>= ` C ) -> ( y e. ran G -> ( y + 1 ) e. ran G ) )
43	21, 22, 23, 22, 29, 42	uzind4 9967	. . . 4 |- ( y e. ( ZZ>= ` C ) -> y e. ran G )
44	20, 43	impbid1 142	. . 3 |- ( C e. ZZ -> ( y e. ran G <-> y e. ( ZZ>= ` C ) ) )
45	44	eqrdv 2236	. 2 |- ( C e. ZZ -> ran G = ( ZZ>= ` C ) )
46	1, 45	syl 14	1 |- ( ph -> ran G = ( ZZ>= ` C ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   A.wal 1400   = wceq 1402   e. wcel 2209   E.wrex 2529   _Vcvv 2821   (/)c0 3520   |-> cmpt 4187   suc csuc 4505   omcom 4732   ran crn 4770   Fn wfn 5367   ` cfv 5372  (class class class)co 6075  freccfrec 6651   1c1 8170   + caddc 8172   ZZcz 9623   ZZ>=cuz 9900

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 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-coll 4241  ax-sep 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-iinf 4730  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-addass 8271  ax-distr 8273  ax-i2m1 8274  ax-0lt1 8275  ax-0id 8277  ax-rnegex 8278  ax-cnre 8280  ax-pre-ltirr 8281  ax-pre-ltwlin 8282  ax-pre-lttrn 8283  ax-pre-ltadd 8285

This theorem 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-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-tr 4225  df-id 4433  df-iord 4506  df-on 4508  df-ilim 4509  df-suc 4511  df-iom 4733  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-recs 6566  df-frec 6652  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-sub 8489  df-neg 8490  df-inn 9284  df-n0 9543  df-z 9624  df-uz 9901

This theorem is referenced by:  frec2uzf1od  10821