clim2divap - Intuitionistic Logic Explorer

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Theorem clim2divap 11566

Description: The limit of an infinite product with an initial segment removed. (Contributed by Scott Fenton, 20-Dec-2017.)

**Hypotheses**
Ref	Expression
clim2div.1	⊢ 𝑍 = (ℤ_≥‘𝑀)
clim2div.2	⊢ (𝜑 → 𝑁 ∈ 𝑍)
clim2div.3	⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℂ)
clim2div.4	⊢ (𝜑 → seq𝑀( · , 𝐹) ⇝ 𝐴)
clim2divap.5	⊢ (𝜑 → (seq𝑀( · , 𝐹)‘𝑁) # 0)

**Assertion**
Ref	Expression
clim2divap	⊢ (𝜑 → seq(𝑁 + 1)( · , 𝐹) ⇝ (𝐴 / (seq𝑀( · , 𝐹)‘𝑁)))

Distinct variable groups: 𝑘,𝐹 𝜑,𝑘 𝑘,𝑀 𝑘,𝑁 𝑘,𝑍 Allowed substitution hint: 𝐴(𝑘)

Proof of Theorem clim2divap Dummy variables 𝑗 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2189	. . 3 ⊢ (ℤ_≥‘(𝑁 + 1)) = (ℤ_≥‘(𝑁 + 1))
2		clim2div.2	. . . . 5 ⊢ (𝜑 → 𝑁 ∈ 𝑍)
3		eluzelz 9555	. . . . . 6 ⊢ (𝑁 ∈ (ℤ_≥‘𝑀) → 𝑁 ∈ ℤ)
4		clim2div.1	. . . . . 6 ⊢ 𝑍 = (ℤ_≥‘𝑀)
5	3, 4	eleq2s 2284	. . . . 5 ⊢ (𝑁 ∈ 𝑍 → 𝑁 ∈ ℤ)
6	2, 5	syl 14	. . . 4 ⊢ (𝜑 → 𝑁 ∈ ℤ)
7	6	peano2zd 9396	. . 3 ⊢ (𝜑 → (𝑁 + 1) ∈ ℤ)
8		clim2div.4	. . 3 ⊢ (𝜑 → seq𝑀( · , 𝐹) ⇝ 𝐴)
9		eluzel2 9551	. . . . . . . 8 ⊢ (𝑁 ∈ (ℤ_≥‘𝑀) → 𝑀 ∈ ℤ)
10	9, 4	eleq2s 2284	. . . . . . 7 ⊢ (𝑁 ∈ 𝑍 → 𝑀 ∈ ℤ)
11	2, 10	syl 14	. . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℤ)
12		clim2div.3	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℂ)
13	4, 11, 12	prodf 11564	. . . . 5 ⊢ (𝜑 → seq𝑀( · , 𝐹):𝑍⟶ℂ)
14	13, 2	ffvelcdmd 5668	. . . 4 ⊢ (𝜑 → (seq𝑀( · , 𝐹)‘𝑁) ∈ ℂ)
15		clim2divap.5	. . . 4 ⊢ (𝜑 → (seq𝑀( · , 𝐹)‘𝑁) # 0)
16	14, 15	recclapd 8756	. . 3 ⊢ (𝜑 → (1 / (seq𝑀( · , 𝐹)‘𝑁)) ∈ ℂ)
17		seqex 10465	. . . 4 ⊢ seq(𝑁 + 1)( · , 𝐹) ∈ V
18	17	a1i 9	. . 3 ⊢ (𝜑 → seq(𝑁 + 1)( · , 𝐹) ∈ V)
19	2, 4	eleqtrdi 2282	. . . . . . 7 ⊢ (𝜑 → 𝑁 ∈ (ℤ_≥‘𝑀))
20		peano2uz 9601	. . . . . . 7 ⊢ (𝑁 ∈ (ℤ_≥‘𝑀) → (𝑁 + 1) ∈ (ℤ_≥‘𝑀))
21	19, 20	syl 14	. . . . . 6 ⊢ (𝜑 → (𝑁 + 1) ∈ (ℤ_≥‘𝑀))
22	21, 4	eleqtrrdi 2283	. . . . 5 ⊢ (𝜑 → (𝑁 + 1) ∈ 𝑍)
23	4	uztrn2 9563	. . . . 5 ⊢ (((𝑁 + 1) ∈ 𝑍 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → 𝑗 ∈ 𝑍)
24	22, 23	sylan 283	. . . 4 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → 𝑗 ∈ 𝑍)
25	13	ffvelcdmda 5667	. . . 4 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑍) → (seq𝑀( · , 𝐹)‘𝑗) ∈ ℂ)
26	24, 25	syldan 282	. . 3 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → (seq𝑀( · , 𝐹)‘𝑗) ∈ ℂ)
27		mulcl 7956	. . . . . . . 8 ⊢ ((𝑘 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (𝑘 · 𝑥) ∈ ℂ)
28	27	adantl 277	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) ∧ (𝑘 ∈ ℂ ∧ 𝑥 ∈ ℂ)) → (𝑘 · 𝑥) ∈ ℂ)
29		mulass 7960	. . . . . . . 8 ⊢ ((𝑘 ∈ ℂ ∧ 𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((𝑘 · 𝑥) · 𝑦) = (𝑘 · (𝑥 · 𝑦)))
30	29	adantl 277	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) ∧ (𝑘 ∈ ℂ ∧ 𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ)) → ((𝑘 · 𝑥) · 𝑦) = (𝑘 · (𝑥 · 𝑦)))
31		simpr 110	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → 𝑗 ∈ (ℤ_≥‘(𝑁 + 1)))
32	19	adantr 276	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → 𝑁 ∈ (ℤ_≥‘𝑀))
33	4	eleq2i 2256	. . . . . . . . 9 ⊢ (𝑘 ∈ 𝑍 ↔ 𝑘 ∈ (ℤ_≥‘𝑀))
34	33, 12	sylan2br 288	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ_≥‘𝑀)) → (𝐹‘𝑘) ∈ ℂ)
35	34	adantlr 477	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) ∧ 𝑘 ∈ (ℤ_≥‘𝑀)) → (𝐹‘𝑘) ∈ ℂ)
36	28, 30, 31, 32, 35	seq3split 10497	. . . . . 6 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → (seq𝑀( · , 𝐹)‘𝑗) = ((seq𝑀( · , 𝐹)‘𝑁) · (seq(𝑁 + 1)( · , 𝐹)‘𝑗)))
37	36	eqcomd 2195	. . . . 5 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → ((seq𝑀( · , 𝐹)‘𝑁) · (seq(𝑁 + 1)( · , 𝐹)‘𝑗)) = (seq𝑀( · , 𝐹)‘𝑗))
38	14	adantr 276	. . . . . 6 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → (seq𝑀( · , 𝐹)‘𝑁) ∈ ℂ)
39	4	uztrn2 9563	. . . . . . . . . 10 ⊢ (((𝑁 + 1) ∈ 𝑍 ∧ 𝑘 ∈ (ℤ_≥‘(𝑁 + 1))) → 𝑘 ∈ 𝑍)
40	22, 39	sylan 283	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ_≥‘(𝑁 + 1))) → 𝑘 ∈ 𝑍)
41	40, 12	syldan 282	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ_≥‘(𝑁 + 1))) → (𝐹‘𝑘) ∈ ℂ)
42	1, 7, 41	prodf 11564	. . . . . . 7 ⊢ (𝜑 → seq(𝑁 + 1)( · , 𝐹):(ℤ_≥‘(𝑁 + 1))⟶ℂ)
43	42	ffvelcdmda 5667	. . . . . 6 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → (seq(𝑁 + 1)( · , 𝐹)‘𝑗) ∈ ℂ)
44	15	adantr 276	. . . . . 6 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → (seq𝑀( · , 𝐹)‘𝑁) # 0)
45	26, 38, 43, 44	divmulapd 8787	. . . . 5 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → (((seq𝑀( · , 𝐹)‘𝑗) / (seq𝑀( · , 𝐹)‘𝑁)) = (seq(𝑁 + 1)( · , 𝐹)‘𝑗) ↔ ((seq𝑀( · , 𝐹)‘𝑁) · (seq(𝑁 + 1)( · , 𝐹)‘𝑗)) = (seq𝑀( · , 𝐹)‘𝑗)))
46	37, 45	mpbird 167	. . . 4 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → ((seq𝑀( · , 𝐹)‘𝑗) / (seq𝑀( · , 𝐹)‘𝑁)) = (seq(𝑁 + 1)( · , 𝐹)‘𝑗))
47	26, 38, 44	divrecap2d 8769	. . . 4 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → ((seq𝑀( · , 𝐹)‘𝑗) / (seq𝑀( · , 𝐹)‘𝑁)) = ((1 / (seq𝑀( · , 𝐹)‘𝑁)) · (seq𝑀( · , 𝐹)‘𝑗)))
48	46, 47	eqtr3d 2224	. . 3 ⊢ ((𝜑 ∧ 𝑗 ∈ (ℤ_≥‘(𝑁 + 1))) → (seq(𝑁 + 1)( · , 𝐹)‘𝑗) = ((1 / (seq𝑀( · , 𝐹)‘𝑁)) · (seq𝑀( · , 𝐹)‘𝑗)))
49	1, 7, 8, 16, 18, 26, 48	climmulc2 11357	. 2 ⊢ (𝜑 → seq(𝑁 + 1)( · , 𝐹) ⇝ ((1 / (seq𝑀( · , 𝐹)‘𝑁)) · 𝐴))
50		climcl 11308	. . . 4 ⊢ (seq𝑀( · , 𝐹) ⇝ 𝐴 → 𝐴 ∈ ℂ)
51	8, 50	syl 14	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℂ)
52	51, 14, 15	divrecap2d 8769	. 2 ⊢ (𝜑 → (𝐴 / (seq𝑀( · , 𝐹)‘𝑁)) = ((1 / (seq𝑀( · , 𝐹)‘𝑁)) · 𝐴))
53	49, 52	breqtrrd 4046	1 ⊢ (𝜑 → seq(𝑁 + 1)( · , 𝐹) ⇝ (𝐴 / (seq𝑀( · , 𝐹)‘𝑁)))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ wa 104 ∧ w3a 980 = wceq 1364 ∈ wcel 2160 Vcvv 2752 class class class wbr 4018 ‘cfv 5231 (class class class)co 5891 ℂcc 7827 0cc0 7829 1c1 7830 + caddc 7832 · cmul 7834 # cap 8556 / cdiv 8647 ℤcz 9271 ℤ_≥cuz 9546 seqcseq 10463 ⇝ cli 11304

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 2162 ax-14 2163 ax-ext 2171 ax-coll 4133 ax-sep 4136 ax-nul 4144 ax-pow 4189 ax-pr 4224 ax-un 4448 ax-setind 4551 ax-iinf 4602 ax-cnex 7920 ax-resscn 7921 ax-1cn 7922 ax-1re 7923 ax-icn 7924 ax-addcl 7925 ax-addrcl 7926 ax-mulcl 7927 ax-mulrcl 7928 ax-addcom 7929 ax-mulcom 7930 ax-addass 7931 ax-mulass 7932 ax-distr 7933 ax-i2m1 7934 ax-0lt1 7935 ax-1rid 7936 ax-0id 7937 ax-rnegex 7938 ax-precex 7939 ax-cnre 7940 ax-pre-ltirr 7941 ax-pre-ltwlin 7942 ax-pre-lttrn 7943 ax-pre-apti 7944 ax-pre-ltadd 7945 ax-pre-mulgt0 7946 ax-pre-mulext 7947 ax-arch 7948 ax-caucvg 7949

This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2041 df-mo 2042 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ne 2361 df-nel 2456 df-ral 2473 df-rex 2474 df-reu 2475 df-rmo 2476 df-rab 2477 df-v 2754 df-sbc 2978 df-csb 3073 df-dif 3146 df-un 3148 df-in 3150 df-ss 3157 df-nul 3438 df-if 3550 df-pw 3592 df-sn 3613 df-pr 3614 df-op 3616 df-uni 3825 df-int 3860 df-iun 3903 df-br 4019 df-opab 4080 df-mpt 4081 df-tr 4117 df-id 4308 df-po 4311 df-iso 4312 df-iord 4381 df-on 4383 df-ilim 4384 df-suc 4386 df-iom 4605 df-xp 4647 df-rel 4648 df-cnv 4649 df-co 4650 df-dm 4651 df-rn 4652 df-res 4653 df-ima 4654 df-iota 5193 df-fun 5233 df-fn 5234 df-f 5235 df-f1 5236 df-fo 5237 df-f1o 5238 df-fv 5239 df-riota 5847 df-ov 5894 df-oprab 5895 df-mpo 5896 df-1st 6159 df-2nd 6160 df-recs 6324 df-frec 6410 df-pnf 8012 df-mnf 8013 df-xr 8014 df-ltxr 8015 df-le 8016 df-sub 8148 df-neg 8149 df-reap 8550 df-ap 8557 df-div 8648 df-inn 8938 df-2 8996 df-3 8997 df-4 8998 df-n0 9195 df-z 9272 df-uz 9547 df-rp 9672 df-fz 10027 df-seqfrec 10464 df-exp 10538 df-cj 10869 df-re 10870 df-im 10871 df-rsqrt 11025 df-abs 11026 df-clim 11305

This theorem is referenced by: (None)

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