Theorem iseqid3s 9466

Description: A sequence that consists of zeroes up to 𝑁 sums to zero at 𝑁. In this case by "zero" we mean whatever the identity 𝑍 is for the operation +). (Contributed by Jim Kingdon, 18-Aug-2021.)

Hypotheses

Ref	Expression
iseqid3s.1	⊢ (𝜑 → (𝑍 + 𝑍) = 𝑍)
iseqid3s.2	⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀))
iseqid3s.3	⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀...𝑁)) → (𝐹‘𝑥) = 𝑍)
iseqid3s.z	⊢ (𝜑 → 𝑍 ∈ 𝑆)
iseqid3s.s	⊢ (𝜑 → 𝑆 ∈ 𝑉)
iseqid3s.f	⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ≥‘𝑀)) → (𝐹‘𝑥) ∈ 𝑆)
iseqid3s.cl	⊢ ((𝜑 ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥 + 𝑦) ∈ 𝑆)

Assertion

Ref	Expression
iseqid3s	⊢ (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑁) = 𝑍)

Distinct variable groups:   𝑥,𝑦, +   𝑥,𝐹,𝑦   𝑥,𝑀,𝑦   𝜑,𝑥,𝑦   𝑥,𝑍,𝑦   𝑥,𝑁,𝑦   𝑥,𝑆,𝑦

Allowed substitution hints:   𝑉(𝑥,𝑦)

Proof of Theorem iseqid3s

Dummy variables 𝑘 𝑤 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		iseqid3s.2	. . 3 ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀))
2		eluzfz2 9051	. . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ (𝑀...𝑁))
3		fveq2 5198	. . . . . 6 ⊢ (𝑤 = 𝑀 → (seq𝑀( + , 𝐹, 𝑆)‘𝑤) = (seq𝑀( + , 𝐹, 𝑆)‘𝑀))
4	3	eqeq1d 2089	. . . . 5 ⊢ (𝑤 = 𝑀 → ((seq𝑀( + , 𝐹, 𝑆)‘𝑤) = 𝑍 ↔ (seq𝑀( + , 𝐹, 𝑆)‘𝑀) = 𝑍))
5	4	imbi2d 228	. . . 4 ⊢ (𝑤 = 𝑀 → ((𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑤) = 𝑍) ↔ (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑀) = 𝑍)))
6		fveq2 5198	. . . . . 6 ⊢ (𝑤 = 𝑘 → (seq𝑀( + , 𝐹, 𝑆)‘𝑤) = (seq𝑀( + , 𝐹, 𝑆)‘𝑘))
7	6	eqeq1d 2089	. . . . 5 ⊢ (𝑤 = 𝑘 → ((seq𝑀( + , 𝐹, 𝑆)‘𝑤) = 𝑍 ↔ (seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍))
8	7	imbi2d 228	. . . 4 ⊢ (𝑤 = 𝑘 → ((𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑤) = 𝑍) ↔ (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍)))
9		fveq2 5198	. . . . . 6 ⊢ (𝑤 = (𝑘 + 1) → (seq𝑀( + , 𝐹, 𝑆)‘𝑤) = (seq𝑀( + , 𝐹, 𝑆)‘(𝑘 + 1)))
10	9	eqeq1d 2089	. . . . 5 ⊢ (𝑤 = (𝑘 + 1) → ((seq𝑀( + , 𝐹, 𝑆)‘𝑤) = 𝑍 ↔ (seq𝑀( + , 𝐹, 𝑆)‘(𝑘 + 1)) = 𝑍))
11	10	imbi2d 228	. . . 4 ⊢ (𝑤 = (𝑘 + 1) → ((𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑤) = 𝑍) ↔ (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘(𝑘 + 1)) = 𝑍)))
12		fveq2 5198	. . . . . 6 ⊢ (𝑤 = 𝑁 → (seq𝑀( + , 𝐹, 𝑆)‘𝑤) = (seq𝑀( + , 𝐹, 𝑆)‘𝑁))
13	12	eqeq1d 2089	. . . . 5 ⊢ (𝑤 = 𝑁 → ((seq𝑀( + , 𝐹, 𝑆)‘𝑤) = 𝑍 ↔ (seq𝑀( + , 𝐹, 𝑆)‘𝑁) = 𝑍))
14	13	imbi2d 228	. . . 4 ⊢ (𝑤 = 𝑁 → ((𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑤) = 𝑍) ↔ (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑁) = 𝑍)))
15		eluzel2 8624	. . . . . . . 8 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ)
16	1, 15	syl 14	. . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℤ)
17		iseqid3s.s	. . . . . . 7 ⊢ (𝜑 → 𝑆 ∈ 𝑉)
18		iseqid3s.f	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ≥‘𝑀)) → (𝐹‘𝑥) ∈ 𝑆)
19		iseqid3s.cl	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥 + 𝑦) ∈ 𝑆)
20	16, 17, 18, 19	iseq1 9442	. . . . . 6 ⊢ (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑀) = (𝐹‘𝑀))
21		iseqid3s.3	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀...𝑁)) → (𝐹‘𝑥) = 𝑍)
22	21	ralrimiva 2434	. . . . . . 7 ⊢ (𝜑 → ∀𝑥 ∈ (𝑀...𝑁)(𝐹‘𝑥) = 𝑍)
23		eluzfz1 9050	. . . . . . . 8 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ (𝑀...𝑁))
24		fveq2 5198	. . . . . . . . . 10 ⊢ (𝑥 = 𝑀 → (𝐹‘𝑥) = (𝐹‘𝑀))
25	24	eqeq1d 2089	. . . . . . . . 9 ⊢ (𝑥 = 𝑀 → ((𝐹‘𝑥) = 𝑍 ↔ (𝐹‘𝑀) = 𝑍))
26	25	rspcv 2697	. . . . . . . 8 ⊢ (𝑀 ∈ (𝑀...𝑁) → (∀𝑥 ∈ (𝑀...𝑁)(𝐹‘𝑥) = 𝑍 → (𝐹‘𝑀) = 𝑍))
27	1, 23, 26	3syl 17	. . . . . . 7 ⊢ (𝜑 → (∀𝑥 ∈ (𝑀...𝑁)(𝐹‘𝑥) = 𝑍 → (𝐹‘𝑀) = 𝑍))
28	22, 27	mpd 13	. . . . . 6 ⊢ (𝜑 → (𝐹‘𝑀) = 𝑍)
29	20, 28	eqtrd 2113	. . . . 5 ⊢ (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑀) = 𝑍)
30	29	a1i 9	. . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑀) = 𝑍))
31		elfzouz 9161	. . . . . . . . . . 11 ⊢ (𝑘 ∈ (𝑀..^𝑁) → 𝑘 ∈ (ℤ≥‘𝑀))
32	31	adantl 271	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → 𝑘 ∈ (ℤ≥‘𝑀))
33	17	adantr 270	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → 𝑆 ∈ 𝑉)
34	18	adantlr 460	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) ∧ 𝑥 ∈ (ℤ≥‘𝑀)) → (𝐹‘𝑥) ∈ 𝑆)
35	19	adantlr 460	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥 + 𝑦) ∈ 𝑆)
36	32, 33, 34, 35	iseqp1 9445	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → (seq𝑀( + , 𝐹, 𝑆)‘(𝑘 + 1)) = ((seq𝑀( + , 𝐹, 𝑆)‘𝑘) + (𝐹‘(𝑘 + 1))))
37	36	adantr 270	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) ∧ (seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍) → (seq𝑀( + , 𝐹, 𝑆)‘(𝑘 + 1)) = ((seq𝑀( + , 𝐹, 𝑆)‘𝑘) + (𝐹‘(𝑘 + 1))))
38		simpr 108	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) ∧ (seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍) → (seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍)
39		fzofzp1 9236	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ (𝑀..^𝑁) → (𝑘 + 1) ∈ (𝑀...𝑁))
40	39	adantl 271	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → (𝑘 + 1) ∈ (𝑀...𝑁))
41	22	adantr 270	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → ∀𝑥 ∈ (𝑀...𝑁)(𝐹‘𝑥) = 𝑍)
42		fveq2 5198	. . . . . . . . . . . . 13 ⊢ (𝑥 = (𝑘 + 1) → (𝐹‘𝑥) = (𝐹‘(𝑘 + 1)))
43	42	eqeq1d 2089	. . . . . . . . . . . 12 ⊢ (𝑥 = (𝑘 + 1) → ((𝐹‘𝑥) = 𝑍 ↔ (𝐹‘(𝑘 + 1)) = 𝑍))
44	43	rspcv 2697	. . . . . . . . . . 11 ⊢ ((𝑘 + 1) ∈ (𝑀...𝑁) → (∀𝑥 ∈ (𝑀...𝑁)(𝐹‘𝑥) = 𝑍 → (𝐹‘(𝑘 + 1)) = 𝑍))
45	40, 41, 44	sylc 61	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → (𝐹‘(𝑘 + 1)) = 𝑍)
46	45	adantr 270	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) ∧ (seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍) → (𝐹‘(𝑘 + 1)) = 𝑍)
47	38, 46	oveq12d 5550	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) ∧ (seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍) → ((seq𝑀( + , 𝐹, 𝑆)‘𝑘) + (𝐹‘(𝑘 + 1))) = (𝑍 + 𝑍))
48		iseqid3s.1	. . . . . . . . 9 ⊢ (𝜑 → (𝑍 + 𝑍) = 𝑍)
49	48	ad2antrr 471	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) ∧ (seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍) → (𝑍 + 𝑍) = 𝑍)
50	37, 47, 49	3eqtrd 2117	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) ∧ (seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍) → (seq𝑀( + , 𝐹, 𝑆)‘(𝑘 + 1)) = 𝑍)
51	50	ex 113	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → ((seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍 → (seq𝑀( + , 𝐹, 𝑆)‘(𝑘 + 1)) = 𝑍))
52	51	expcom 114	. . . . 5 ⊢ (𝑘 ∈ (𝑀..^𝑁) → (𝜑 → ((seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍 → (seq𝑀( + , 𝐹, 𝑆)‘(𝑘 + 1)) = 𝑍)))
53	52	a2d 26	. . . 4 ⊢ (𝑘 ∈ (𝑀..^𝑁) → ((𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑘) = 𝑍) → (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘(𝑘 + 1)) = 𝑍)))
54	5, 8, 11, 14, 30, 53	fzind2 9248	. . 3 ⊢ (𝑁 ∈ (𝑀...𝑁) → (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑁) = 𝑍))
55	1, 2, 54	3syl 17	. 2 ⊢ (𝜑 → (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑁) = 𝑍))
56	55	pm2.43i 48	1 ⊢ (𝜑 → (seq𝑀( + , 𝐹, 𝑆)‘𝑁) = 𝑍)

Syntax hints:   → wi 4   ∧ wa 102   = wceq 1284   ∈ wcel 1433  ∀wral 2348  ‘cfv 4922  (class class class)co 5532  1c1 6982   + caddc 6984  ℤcz 8351  ℤ_≥cuz 8619  ...cfz 9029  ..^cfzo 9152  seqcseq 9431

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-in1 576  ax-in2 577  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-13 1444  ax-14 1445  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-coll 3893  ax-sep 3896  ax-nul 3904  ax-pow 3948  ax-pr 3964  ax-un 4188  ax-setind 4280  ax-iinf 4329  ax-cnex 7067  ax-resscn 7068  ax-1cn 7069  ax-1re 7070  ax-icn 7071  ax-addcl 7072  ax-addrcl 7073  ax-mulcl 7074  ax-addcom 7076  ax-addass 7078  ax-distr 7080  ax-i2m1 7081  ax-0lt1 7082  ax-0id 7084  ax-rnegex 7085  ax-cnre 7087  ax-pre-ltirr 7088  ax-pre-ltwlin 7089  ax-pre-lttrn 7090  ax-pre-ltadd 7092

This theorem depends on definitions:  df-bi 115  df-3or 920  df-3an 921  df-tru 1287  df-fal 1290  df-nf 1390  df-sb 1686  df-eu 1944  df-mo 1945  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-ne 2246  df-nel 2340  df-ral 2353  df-rex 2354  df-reu 2355  df-rab 2357  df-v 2603  df-sbc 2816  df-csb 2909  df-dif 2975  df-un 2977  df-in 2979  df-ss 2986  df-nul 3252  df-pw 3384  df-sn 3404  df-pr 3405  df-op 3407  df-uni 3602  df-int 3637  df-iun 3680  df-br 3786  df-opab 3840  df-mpt 3841  df-tr 3876  df-id 4048  df-iord 4121  df-on 4123  df-suc 4126  df-iom 4332  df-xp 4369  df-rel 4370  df-cnv 4371  df-co 4372  df-dm 4373  df-rn 4374  df-res 4375  df-ima 4376  df-iota 4887  df-fun 4924  df-fn 4925  df-f 4926  df-f1 4927  df-fo 4928  df-f1o 4929  df-fv 4930  df-riota 5488  df-ov 5535  df-oprab 5536  df-mpt2 5537  df-1st 5787  df-2nd 5788  df-recs 5943  df-frec 6001  df-pnf 7155  df-mnf 7156  df-xr 7157  df-ltxr 7158  df-le 7159  df-sub 7281  df-neg 7282  df-inn 8040  df-n0 8289  df-z 8352  df-uz 8620  df-fz 9030  df-fzo 9153  df-iseq 9432

This theorem is referenced by:  iseqid  9467  iser0  9471