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Mirrors > Home > ILE Home > Th. List > isum1p | GIF version |
Description: The infinite sum of a converging infinite series equals the first term plus the infinite sum of the rest of it. (Contributed by NM, 2-Jan-2006.) (Revised by Mario Carneiro, 24-Apr-2014.) |
Ref | Expression |
---|---|
isum1p.1 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
isum1p.3 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
isum1p.4 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) = 𝐴) |
isum1p.5 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐴 ∈ ℂ) |
isum1p.6 | ⊢ (𝜑 → seq𝑀( + , 𝐹) ∈ dom ⇝ ) |
Ref | Expression |
---|---|
isum1p | ⊢ (𝜑 → Σ𝑘 ∈ 𝑍 𝐴 = ((𝐹‘𝑀) + Σ𝑘 ∈ (ℤ≥‘(𝑀 + 1))𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | isum1p.1 | . . 3 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
2 | eqid 2154 | . . 3 ⊢ (ℤ≥‘(𝑀 + 1)) = (ℤ≥‘(𝑀 + 1)) | |
3 | isum1p.3 | . . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
4 | uzid 9432 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ (ℤ≥‘𝑀)) | |
5 | 3, 4 | syl 14 | . . . . 5 ⊢ (𝜑 → 𝑀 ∈ (ℤ≥‘𝑀)) |
6 | peano2uz 9473 | . . . . 5 ⊢ (𝑀 ∈ (ℤ≥‘𝑀) → (𝑀 + 1) ∈ (ℤ≥‘𝑀)) | |
7 | 5, 6 | syl 14 | . . . 4 ⊢ (𝜑 → (𝑀 + 1) ∈ (ℤ≥‘𝑀)) |
8 | 7, 1 | eleqtrrdi 2248 | . . 3 ⊢ (𝜑 → (𝑀 + 1) ∈ 𝑍) |
9 | isum1p.4 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) = 𝐴) | |
10 | isum1p.5 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐴 ∈ ℂ) | |
11 | isum1p.6 | . . 3 ⊢ (𝜑 → seq𝑀( + , 𝐹) ∈ dom ⇝ ) | |
12 | 1, 2, 8, 9, 10, 11 | isumsplit 11365 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ 𝑍 𝐴 = (Σ𝑘 ∈ (𝑀...((𝑀 + 1) − 1))𝐴 + Σ𝑘 ∈ (ℤ≥‘(𝑀 + 1))𝐴)) |
13 | 3 | zcnd 9266 | . . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℂ) |
14 | ax-1cn 7804 | . . . . . . 7 ⊢ 1 ∈ ℂ | |
15 | pncan 8060 | . . . . . . 7 ⊢ ((𝑀 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑀 + 1) − 1) = 𝑀) | |
16 | 13, 14, 15 | sylancl 410 | . . . . . 6 ⊢ (𝜑 → ((𝑀 + 1) − 1) = 𝑀) |
17 | 16 | oveq2d 5830 | . . . . 5 ⊢ (𝜑 → (𝑀...((𝑀 + 1) − 1)) = (𝑀...𝑀)) |
18 | 17 | sumeq1d 11240 | . . . 4 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...((𝑀 + 1) − 1))𝐴 = Σ𝑘 ∈ (𝑀...𝑀)𝐴) |
19 | elfzuz 9902 | . . . . . . 7 ⊢ (𝑘 ∈ (𝑀...𝑀) → 𝑘 ∈ (ℤ≥‘𝑀)) | |
20 | 19, 1 | eleqtrrdi 2248 | . . . . . 6 ⊢ (𝑘 ∈ (𝑀...𝑀) → 𝑘 ∈ 𝑍) |
21 | 20, 9 | sylan2 284 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑀)) → (𝐹‘𝑘) = 𝐴) |
22 | 21 | sumeq2dv 11242 | . . . 4 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑀)(𝐹‘𝑘) = Σ𝑘 ∈ (𝑀...𝑀)𝐴) |
23 | fveq2 5461 | . . . . . . 7 ⊢ (𝑘 = 𝑀 → (𝐹‘𝑘) = (𝐹‘𝑀)) | |
24 | 23 | eleq1d 2223 | . . . . . 6 ⊢ (𝑘 = 𝑀 → ((𝐹‘𝑘) ∈ ℂ ↔ (𝐹‘𝑀) ∈ ℂ)) |
25 | 9, 10 | eqeltrd 2231 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℂ) |
26 | 25 | ralrimiva 2527 | . . . . . 6 ⊢ (𝜑 → ∀𝑘 ∈ 𝑍 (𝐹‘𝑘) ∈ ℂ) |
27 | 5, 1 | eleqtrrdi 2248 | . . . . . 6 ⊢ (𝜑 → 𝑀 ∈ 𝑍) |
28 | 24, 26, 27 | rspcdva 2818 | . . . . 5 ⊢ (𝜑 → (𝐹‘𝑀) ∈ ℂ) |
29 | 23 | fsum1 11286 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ (𝐹‘𝑀) ∈ ℂ) → Σ𝑘 ∈ (𝑀...𝑀)(𝐹‘𝑘) = (𝐹‘𝑀)) |
30 | 3, 28, 29 | syl2anc 409 | . . . 4 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑀)(𝐹‘𝑘) = (𝐹‘𝑀)) |
31 | 18, 22, 30 | 3eqtr2d 2193 | . . 3 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...((𝑀 + 1) − 1))𝐴 = (𝐹‘𝑀)) |
32 | 31 | oveq1d 5829 | . 2 ⊢ (𝜑 → (Σ𝑘 ∈ (𝑀...((𝑀 + 1) − 1))𝐴 + Σ𝑘 ∈ (ℤ≥‘(𝑀 + 1))𝐴) = ((𝐹‘𝑀) + Σ𝑘 ∈ (ℤ≥‘(𝑀 + 1))𝐴)) |
33 | 12, 32 | eqtrd 2187 | 1 ⊢ (𝜑 → Σ𝑘 ∈ 𝑍 𝐴 = ((𝐹‘𝑀) + Σ𝑘 ∈ (ℤ≥‘(𝑀 + 1))𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1332 ∈ wcel 2125 dom cdm 4579 ‘cfv 5163 (class class class)co 5814 ℂcc 7709 1c1 7712 + caddc 7714 − cmin 8025 ℤcz 9146 ℤ≥cuz 9418 ...cfz 9890 seqcseq 10322 ⇝ cli 11152 Σcsu 11227 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1481 ax-10 1482 ax-11 1483 ax-i12 1484 ax-bndl 1486 ax-4 1487 ax-17 1503 ax-i9 1507 ax-ial 1511 ax-i5r 1512 ax-13 2127 ax-14 2128 ax-ext 2136 ax-coll 4075 ax-sep 4078 ax-nul 4086 ax-pow 4130 ax-pr 4164 ax-un 4388 ax-setind 4490 ax-iinf 4541 ax-cnex 7802 ax-resscn 7803 ax-1cn 7804 ax-1re 7805 ax-icn 7806 ax-addcl 7807 ax-addrcl 7808 ax-mulcl 7809 ax-mulrcl 7810 ax-addcom 7811 ax-mulcom 7812 ax-addass 7813 ax-mulass 7814 ax-distr 7815 ax-i2m1 7816 ax-0lt1 7817 ax-1rid 7818 ax-0id 7819 ax-rnegex 7820 ax-precex 7821 ax-cnre 7822 ax-pre-ltirr 7823 ax-pre-ltwlin 7824 ax-pre-lttrn 7825 ax-pre-apti 7826 ax-pre-ltadd 7827 ax-pre-mulgt0 7828 ax-pre-mulext 7829 ax-arch 7830 ax-caucvg 7831 |
This theorem depends on definitions: df-bi 116 df-dc 821 df-3or 964 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1740 df-eu 2006 df-mo 2007 df-clab 2141 df-cleq 2147 df-clel 2150 df-nfc 2285 df-ne 2325 df-nel 2420 df-ral 2437 df-rex 2438 df-reu 2439 df-rmo 2440 df-rab 2441 df-v 2711 df-sbc 2934 df-csb 3028 df-dif 3100 df-un 3102 df-in 3104 df-ss 3111 df-nul 3391 df-if 3502 df-pw 3541 df-sn 3562 df-pr 3563 df-op 3565 df-uni 3769 df-int 3804 df-iun 3847 df-br 3962 df-opab 4022 df-mpt 4023 df-tr 4059 df-id 4248 df-po 4251 df-iso 4252 df-iord 4321 df-on 4323 df-ilim 4324 df-suc 4326 df-iom 4544 df-xp 4585 df-rel 4586 df-cnv 4587 df-co 4588 df-dm 4589 df-rn 4590 df-res 4591 df-ima 4592 df-iota 5128 df-fun 5165 df-fn 5166 df-f 5167 df-f1 5168 df-fo 5169 df-f1o 5170 df-fv 5171 df-isom 5172 df-riota 5770 df-ov 5817 df-oprab 5818 df-mpo 5819 df-1st 6078 df-2nd 6079 df-recs 6242 df-irdg 6307 df-frec 6328 df-1o 6353 df-oadd 6357 df-er 6469 df-en 6675 df-dom 6676 df-fin 6677 df-pnf 7893 df-mnf 7894 df-xr 7895 df-ltxr 7896 df-le 7897 df-sub 8027 df-neg 8028 df-reap 8429 df-ap 8436 df-div 8525 df-inn 8813 df-2 8871 df-3 8872 df-4 8873 df-n0 9070 df-z 9147 df-uz 9419 df-q 9507 df-rp 9539 df-fz 9891 df-fzo 10020 df-seqfrec 10323 df-exp 10397 df-ihash 10627 df-cj 10719 df-re 10720 df-im 10721 df-rsqrt 10875 df-abs 10876 df-clim 11153 df-sumdc 11228 |
This theorem is referenced by: isumnn0nn 11367 efsep 11565 |
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