Theorem seqfveq2g 10538

Description: Equality of sequences. (Contributed by NM, 17-Mar-2005.) (Revised by Mario Carneiro, 27-May-2014.)

Hypotheses

Ref	Expression
seqfveq2.1	|- ( ph -> K e. ( ZZ>= ` M ) )
seqfveq2.2	|- ( ph -> ( seq M ( .+ , F ) ` K ) = ( G ` K ) )
seqfveq2g.p	|- ( ph -> .+ e. V )
seqfveq2g.f	|- ( ph -> F e. W )
seqfveq2g.g	|- ( ph -> G e. X )
seqfveq2.3	|- ( ph -> N e. ( ZZ>= ` K ) )
seqfveq2.4	|- ( ( ph /\ k e. ( ( K + 1 ) ... N ) ) -> ( F ` k ) = ( G ` k ) )

Assertion

Ref	Expression
seqfveq2g	|- ( ph -> ( seq M ( .+ , F ) ` N ) = ( seq K ( .+ , G ) ` N ) )

Distinct variable groups:   k, F   k, G   k, K   k, N   ph, k

Allowed substitution hints:   .+ ( k)   M( k)   V( k)   W( k)   X( k)

Proof of Theorem seqfveq2g

Dummy variables n x are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		seqfveq2.3	. . 3 |- ( ph -> N e. ( ZZ>= ` K ) )
2		eluzfz2 10088	. . 3 |- ( N e. ( ZZ>= ` K ) -> N e. ( K ... N ) )
3	1, 2	syl 14	. 2 |- ( ph -> N e. ( K ... N ) )
4		eleq1 2256	. . . . . 6 |- ( x = K -> ( x e. ( K ... N ) <-> K e. ( K ... N ) ) )
5		fveq2 5546	. . . . . . 7 |- ( x = K -> ( seq M ( .+ , F ) ` x ) = ( seq M ( .+ , F ) ` K ) )
6		fveq2 5546	. . . . . . 7 |- ( x = K -> ( seq K ( .+ , G ) ` x ) = ( seq K ( .+ , G ) ` K ) )
7	5, 6	eqeq12d 2208	. . . . . 6 |- ( x = K -> ( ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) <-> ( seq M ( .+ , F ) ` K ) = ( seq K ( .+ , G ) ` K ) ) )
8	4, 7	imbi12d 234	. . . . 5 |- ( x = K -> ( ( x e. ( K ... N ) -> ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) ) <-> ( K e. ( K ... N ) -> ( seq M ( .+ , F ) ` K ) = ( seq K ( .+ , G ) ` K ) ) ) )
9	8	imbi2d 230	. . . 4 |- ( x = K -> ( ( ph -> ( x e. ( K ... N ) -> ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) ) ) <-> ( ph -> ( K e. ( K ... N ) -> ( seq M ( .+ , F ) ` K ) = ( seq K ( .+ , G ) ` K ) ) ) ) )
10		eleq1 2256	. . . . . 6 |- ( x = n -> ( x e. ( K ... N ) <-> n e. ( K ... N ) ) )
11		fveq2 5546	. . . . . . 7 |- ( x = n -> ( seq M ( .+ , F ) ` x ) = ( seq M ( .+ , F ) ` n ) )
12		fveq2 5546	. . . . . . 7 |- ( x = n -> ( seq K ( .+ , G ) ` x ) = ( seq K ( .+ , G ) ` n ) )
13	11, 12	eqeq12d 2208	. . . . . 6 |- ( x = n -> ( ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) <-> ( seq M ( .+ , F ) ` n ) = ( seq K ( .+ , G ) ` n ) ) )
14	10, 13	imbi12d 234	. . . . 5 |- ( x = n -> ( ( x e. ( K ... N ) -> ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) ) <-> ( n e. ( K ... N ) -> ( seq M ( .+ , F ) ` n ) = ( seq K ( .+ , G ) ` n ) ) ) )
15	14	imbi2d 230	. . . 4 |- ( x = n -> ( ( ph -> ( x e. ( K ... N ) -> ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) ) ) <-> ( ph -> ( n e. ( K ... N ) -> ( seq M ( .+ , F ) ` n ) = ( seq K ( .+ , G ) ` n ) ) ) ) )
16		eleq1 2256	. . . . . 6 |- ( x = ( n + 1 ) -> ( x e. ( K ... N ) <-> ( n + 1 ) e. ( K ... N ) ) )
17		fveq2 5546	. . . . . . 7 |- ( x = ( n + 1 ) -> ( seq M ( .+ , F ) ` x ) = ( seq M ( .+ , F ) ` ( n + 1 ) ) )
18		fveq2 5546	. . . . . . 7 |- ( x = ( n + 1 ) -> ( seq K ( .+ , G ) ` x ) = ( seq K ( .+ , G ) ` ( n + 1 ) ) )
19	17, 18	eqeq12d 2208	. . . . . 6 |- ( x = ( n + 1 ) -> ( ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) <-> ( seq M ( .+ , F ) ` ( n + 1 ) ) = ( seq K ( .+ , G ) ` ( n + 1 ) ) ) )
20	16, 19	imbi12d 234	. . . . 5 |- ( x = ( n + 1 ) -> ( ( x e. ( K ... N ) -> ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) ) <-> ( ( n + 1 ) e. ( K ... N ) -> ( seq M ( .+ , F ) ` ( n + 1 ) ) = ( seq K ( .+ , G ) ` ( n + 1 ) ) ) ) )
21	20	imbi2d 230	. . . 4 |- ( x = ( n + 1 ) -> ( ( ph -> ( x e. ( K ... N ) -> ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) ) ) <-> ( ph -> ( ( n + 1 ) e. ( K ... N ) -> ( seq M ( .+ , F ) ` ( n + 1 ) ) = ( seq K ( .+ , G ) ` ( n + 1 ) ) ) ) ) )
22		eleq1 2256	. . . . . 6 |- ( x = N -> ( x e. ( K ... N ) <-> N e. ( K ... N ) ) )
23		fveq2 5546	. . . . . . 7 |- ( x = N -> ( seq M ( .+ , F ) ` x ) = ( seq M ( .+ , F ) ` N ) )
24		fveq2 5546	. . . . . . 7 |- ( x = N -> ( seq K ( .+ , G ) ` x ) = ( seq K ( .+ , G ) ` N ) )
25	23, 24	eqeq12d 2208	. . . . . 6 |- ( x = N -> ( ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) <-> ( seq M ( .+ , F ) ` N ) = ( seq K ( .+ , G ) ` N ) ) )
26	22, 25	imbi12d 234	. . . . 5 |- ( x = N -> ( ( x e. ( K ... N ) -> ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) ) <-> ( N e. ( K ... N ) -> ( seq M ( .+ , F ) ` N ) = ( seq K ( .+ , G ) ` N ) ) ) )
27	26	imbi2d 230	. . . 4 |- ( x = N -> ( ( ph -> ( x e. ( K ... N ) -> ( seq M ( .+ , F ) ` x ) = ( seq K ( .+ , G ) ` x ) ) ) <-> ( ph -> ( N e. ( K ... N ) -> ( seq M ( .+ , F ) ` N ) = ( seq K ( .+ , G ) ` N ) ) ) ) )
28		seqfveq2.2	. . . . . 6 |- ( ph -> ( seq M ( .+ , F ) ` K ) = ( G ` K ) )
29		seqfveq2.1	. . . . . . . 8 |- ( ph -> K e. ( ZZ>= ` M ) )
30		eluzelz 9591	. . . . . . . 8 |- ( K e. ( ZZ>= ` M ) -> K e. ZZ )
31	29, 30	syl 14	. . . . . . 7 |- ( ph -> K e. ZZ )
32		seqfveq2g.g	. . . . . . 7 |- ( ph -> G e. X )
33		seqfveq2g.p	. . . . . . 7 |- ( ph -> .+ e. V )
34		seq1g 10524	. . . . . . 7 |- ( ( K e. ZZ /\ G e. X /\ .+ e. V ) -> ( seq K ( .+ , G ) ` K ) = ( G ` K ) )
35	31, 32, 33, 34	syl3anc 1249	. . . . . 6 |- ( ph -> ( seq K ( .+ , G ) ` K ) = ( G ` K ) )
36	28, 35	eqtr4d 2229	. . . . 5 |- ( ph -> ( seq M ( .+ , F ) ` K ) = ( seq K ( .+ , G ) ` K ) )
37	36	a1d 22	. . . 4 |- ( ph -> ( K e. ( K ... N ) -> ( seq M ( .+ , F ) ` K ) = ( seq K ( .+ , G ) ` K ) ) )
38		peano2fzr 10093	. . . . . . . 8 |- ( ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) -> n e. ( K ... N ) )
39	38	adantl 277	. . . . . . 7 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> n e. ( K ... N ) )
40	39	expr 375	. . . . . 6 |- ( ( ph /\ n e. ( ZZ>= ` K ) ) -> ( ( n + 1 ) e. ( K ... N ) -> n e. ( K ... N ) ) )
41	40	imim1d 75	. . . . 5 |- ( ( ph /\ n e. ( ZZ>= ` K ) ) -> ( ( n e. ( K ... N ) -> ( seq M ( .+ , F ) ` n ) = ( seq K ( .+ , G ) ` n ) ) -> ( ( n + 1 ) e. ( K ... N ) -> ( seq M ( .+ , F ) ` n ) = ( seq K ( .+ , G ) ` n ) ) ) )
42		oveq1 5917	. . . . . 6 |- ( ( seq M ( .+ , F ) ` n ) = ( seq K ( .+ , G ) ` n ) -> ( ( seq M ( .+ , F ) ` n ) .+ ( F ` ( n + 1 ) ) ) = ( ( seq K ( .+ , G ) ` n ) .+ ( F ` ( n + 1 ) ) ) )
43		simpl 109	. . . . . . . . 9 |- ( ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) -> n e. ( ZZ>= ` K ) )
44		uztrn 9599	. . . . . . . . 9 |- ( ( n e. ( ZZ>= ` K ) /\ K e. ( ZZ>= ` M ) ) -> n e. ( ZZ>= ` M ) )
45	43, 29, 44	syl2anr 290	. . . . . . . 8 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> n e. ( ZZ>= ` M ) )
46		seqfveq2g.f	. . . . . . . . 9 |- ( ph -> F e. W )
47	46	adantr 276	. . . . . . . 8 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> F e. W )
48	33	adantr 276	. . . . . . . 8 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> .+ e. V )
49		seqp1g 10527	. . . . . . . 8 |- ( ( n e. ( ZZ>= ` M ) /\ F e. W /\ .+ e. V ) -> ( seq M ( .+ , F ) ` ( n + 1 ) ) = ( ( seq M ( .+ , F ) ` n ) .+ ( F ` ( n + 1 ) ) ) )
50	45, 47, 48, 49	syl3anc 1249	. . . . . . 7 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> ( seq M ( .+ , F ) ` ( n + 1 ) ) = ( ( seq M ( .+ , F ) ` n ) .+ ( F ` ( n + 1 ) ) ) )
51	43	adantl 277	. . . . . . . . 9 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> n e. ( ZZ>= ` K ) )
52	32	adantr 276	. . . . . . . . 9 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> G e. X )
53		seqp1g 10527	. . . . . . . . 9 |- ( ( n e. ( ZZ>= ` K ) /\ G e. X /\ .+ e. V ) -> ( seq K ( .+ , G ) ` ( n + 1 ) ) = ( ( seq K ( .+ , G ) ` n ) .+ ( G ` ( n + 1 ) ) ) )
54	51, 52, 48, 53	syl3anc 1249	. . . . . . . 8 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> ( seq K ( .+ , G ) ` ( n + 1 ) ) = ( ( seq K ( .+ , G ) ` n ) .+ ( G ` ( n + 1 ) ) ) )
55		fveq2 5546	. . . . . . . . . . 11 |- ( k = ( n + 1 ) -> ( F ` k ) = ( F ` ( n + 1 ) ) )
56		fveq2 5546	. . . . . . . . . . 11 |- ( k = ( n + 1 ) -> ( G ` k ) = ( G ` ( n + 1 ) ) )
57	55, 56	eqeq12d 2208	. . . . . . . . . 10 |- ( k = ( n + 1 ) -> ( ( F ` k ) = ( G ` k ) <-> ( F ` ( n + 1 ) ) = ( G ` ( n + 1 ) ) ) )
58		seqfveq2.4	. . . . . . . . . . . 12 |- ( ( ph /\ k e. ( ( K + 1 ) ... N ) ) -> ( F ` k ) = ( G ` k ) )
59	58	ralrimiva 2567	. . . . . . . . . . 11 |- ( ph -> A. k e. ( ( K + 1 ) ... N ) ( F ` k ) = ( G ` k ) )
60	59	adantr 276	. . . . . . . . . 10 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> A. k e. ( ( K + 1 ) ... N ) ( F ` k ) = ( G ` k ) )
61		eluzp1p1 9608	. . . . . . . . . . . 12 |- ( n e. ( ZZ>= ` K ) -> ( n + 1 ) e. ( ZZ>= ` ( K + 1 ) ) )
62	61	ad2antrl 490	. . . . . . . . . . 11 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> ( n + 1 ) e. ( ZZ>= ` ( K + 1 ) ) )
63		elfzuz3 10078	. . . . . . . . . . . 12 |- ( ( n + 1 ) e. ( K ... N ) -> N e. ( ZZ>= ` ( n + 1 ) ) )
64	63	ad2antll 491	. . . . . . . . . . 11 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> N e. ( ZZ>= ` ( n + 1 ) ) )
65		elfzuzb 10075	. . . . . . . . . . 11 |- ( ( n + 1 ) e. ( ( K + 1 ) ... N ) <-> ( ( n + 1 ) e. ( ZZ>= ` ( K + 1 ) ) /\ N e. ( ZZ>= ` ( n + 1 ) ) ) )
66	62, 64, 65	sylanbrc 417	. . . . . . . . . 10 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> ( n + 1 ) e. ( ( K + 1 ) ... N ) )
67	57, 60, 66	rspcdva 2869	. . . . . . . . 9 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> ( F ` ( n + 1 ) ) = ( G ` ( n + 1 ) ) )
68	67	oveq2d 5926	. . . . . . . 8 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> ( ( seq K ( .+ , G ) ` n ) .+ ( F ` ( n + 1 ) ) ) = ( ( seq K ( .+ , G ) ` n ) .+ ( G ` ( n + 1 ) ) ) )
69	54, 68	eqtr4d 2229	. . . . . . 7 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> ( seq K ( .+ , G ) ` ( n + 1 ) ) = ( ( seq K ( .+ , G ) ` n ) .+ ( F ` ( n + 1 ) ) ) )
70	50, 69	eqeq12d 2208	. . . . . 6 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> ( ( seq M ( .+ , F ) ` ( n + 1 ) ) = ( seq K ( .+ , G ) ` ( n + 1 ) ) <-> ( ( seq M ( .+ , F ) ` n ) .+ ( F ` ( n + 1 ) ) ) = ( ( seq K ( .+ , G ) ` n ) .+ ( F ` ( n + 1 ) ) ) ) )
71	42, 70	imbitrrid 156	. . . . 5 |- ( ( ph /\ ( n e. ( ZZ>= ` K ) /\ ( n + 1 ) e. ( K ... N ) ) ) -> ( ( seq M ( .+ , F ) ` n ) = ( seq K ( .+ , G ) ` n ) -> ( seq M ( .+ , F ) ` ( n + 1 ) ) = ( seq K ( .+ , G ) ` ( n + 1 ) ) ) )
72	41, 71	animpimp2impd 559	. . . 4 |- ( n e. ( ZZ>= ` K ) -> ( ( ph -> ( n e. ( K ... N ) -> ( seq M ( .+ , F ) ` n ) = ( seq K ( .+ , G ) ` n ) ) ) -> ( ph -> ( ( n + 1 ) e. ( K ... N ) -> ( seq M ( .+ , F ) ` ( n + 1 ) ) = ( seq K ( .+ , G ) ` ( n + 1 ) ) ) ) ) )
73	9, 15, 21, 27, 37, 72	uzind4i 9647	. . 3 |- ( N e. ( ZZ>= ` K ) -> ( ph -> ( N e. ( K ... N ) -> ( seq M ( .+ , F ) ` N ) = ( seq K ( .+ , G ) ` N ) ) ) )
74	1, 73	mpcom 36	. 2 |- ( ph -> ( N e. ( K ... N ) -> ( seq M ( .+ , F ) ` N ) = ( seq K ( .+ , G ) ` N ) ) )
75	3, 74	mpd 13	1 |- ( ph -> ( seq M ( .+ , F ) ` N ) = ( seq K ( .+ , G ) ` N ) )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1364   e. wcel 2164   A.wral 2472   ` cfv 5246  (class class class)co 5910   1c1 7863   + caddc 7865   ZZcz 9307   ZZ>=cuz 9582   ...cfz 10064   seqcseq 10508

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 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-coll 4144  ax-sep 4147  ax-nul 4155  ax-pow 4203  ax-pr 4238  ax-un 4462  ax-setind 4565  ax-iinf 4616  ax-cnex 7953  ax-resscn 7954  ax-1cn 7955  ax-1re 7956  ax-icn 7957  ax-addcl 7958  ax-addrcl 7959  ax-mulcl 7960  ax-addcom 7962  ax-addass 7964  ax-distr 7966  ax-i2m1 7967  ax-0lt1 7968  ax-0id 7970  ax-rnegex 7971  ax-cnre 7973  ax-pre-ltirr 7974  ax-pre-ltwlin 7975  ax-pre-lttrn 7976  ax-pre-ltadd 7978

This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ne 2365  df-nel 2460  df-ral 2477  df-rex 2478  df-reu 2479  df-rab 2481  df-v 2762  df-sbc 2986  df-csb 3081  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-nul 3447  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-int 3871  df-iun 3914  df-br 4030  df-opab 4091  df-mpt 4092  df-tr 4128  df-id 4322  df-iord 4395  df-on 4397  df-ilim 4398  df-suc 4400  df-iom 4619  df-xp 4661  df-rel 4662  df-cnv 4663  df-co 4664  df-dm 4665  df-rn 4666  df-res 4667  df-ima 4668  df-iota 5207  df-fun 5248  df-fn 5249  df-f 5250  df-f1 5251  df-fo 5252  df-f1o 5253  df-fv 5254  df-riota 5865  df-ov 5913  df-oprab 5914  df-mpo 5915  df-1st 6184  df-2nd 6185  df-recs 6349  df-frec 6435  df-pnf 8046  df-mnf 8047  df-xr 8048  df-ltxr 8049  df-le 8050  df-sub 8182  df-neg 8183  df-inn 8973  df-n0 9231  df-z 9308  df-uz 9583  df-fz 10065  df-seqfrec 10509

This theorem is referenced by:  seqfveqg  10539