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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 2177 | . . 3 ⊢ (ℤ≥‘(𝑀 + 1)) = (ℤ≥‘(𝑀 + 1)) | |
3 | isum1p.3 | . . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
4 | uzid 9542 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ (ℤ≥‘𝑀)) | |
5 | 3, 4 | syl 14 | . . . . 5 ⊢ (𝜑 → 𝑀 ∈ (ℤ≥‘𝑀)) |
6 | peano2uz 9583 | . . . . 5 ⊢ (𝑀 ∈ (ℤ≥‘𝑀) → (𝑀 + 1) ∈ (ℤ≥‘𝑀)) | |
7 | 5, 6 | syl 14 | . . . 4 ⊢ (𝜑 → (𝑀 + 1) ∈ (ℤ≥‘𝑀)) |
8 | 7, 1 | eleqtrrdi 2271 | . . 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 11499 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ 𝑍 𝐴 = (Σ𝑘 ∈ (𝑀...((𝑀 + 1) − 1))𝐴 + Σ𝑘 ∈ (ℤ≥‘(𝑀 + 1))𝐴)) |
13 | 3 | zcnd 9376 | . . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℂ) |
14 | ax-1cn 7904 | . . . . . . 7 ⊢ 1 ∈ ℂ | |
15 | pncan 8163 | . . . . . . 7 ⊢ ((𝑀 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝑀 + 1) − 1) = 𝑀) | |
16 | 13, 14, 15 | sylancl 413 | . . . . . 6 ⊢ (𝜑 → ((𝑀 + 1) − 1) = 𝑀) |
17 | 16 | oveq2d 5891 | . . . . 5 ⊢ (𝜑 → (𝑀...((𝑀 + 1) − 1)) = (𝑀...𝑀)) |
18 | 17 | sumeq1d 11374 | . . . 4 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...((𝑀 + 1) − 1))𝐴 = Σ𝑘 ∈ (𝑀...𝑀)𝐴) |
19 | elfzuz 10021 | . . . . . . 7 ⊢ (𝑘 ∈ (𝑀...𝑀) → 𝑘 ∈ (ℤ≥‘𝑀)) | |
20 | 19, 1 | eleqtrrdi 2271 | . . . . . 6 ⊢ (𝑘 ∈ (𝑀...𝑀) → 𝑘 ∈ 𝑍) |
21 | 20, 9 | sylan2 286 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑀)) → (𝐹‘𝑘) = 𝐴) |
22 | 21 | sumeq2dv 11376 | . . . 4 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑀)(𝐹‘𝑘) = Σ𝑘 ∈ (𝑀...𝑀)𝐴) |
23 | fveq2 5516 | . . . . . . 7 ⊢ (𝑘 = 𝑀 → (𝐹‘𝑘) = (𝐹‘𝑀)) | |
24 | 23 | eleq1d 2246 | . . . . . 6 ⊢ (𝑘 = 𝑀 → ((𝐹‘𝑘) ∈ ℂ ↔ (𝐹‘𝑀) ∈ ℂ)) |
25 | 9, 10 | eqeltrd 2254 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℂ) |
26 | 25 | ralrimiva 2550 | . . . . . 6 ⊢ (𝜑 → ∀𝑘 ∈ 𝑍 (𝐹‘𝑘) ∈ ℂ) |
27 | 5, 1 | eleqtrrdi 2271 | . . . . . 6 ⊢ (𝜑 → 𝑀 ∈ 𝑍) |
28 | 24, 26, 27 | rspcdva 2847 | . . . . 5 ⊢ (𝜑 → (𝐹‘𝑀) ∈ ℂ) |
29 | 23 | fsum1 11420 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ (𝐹‘𝑀) ∈ ℂ) → Σ𝑘 ∈ (𝑀...𝑀)(𝐹‘𝑘) = (𝐹‘𝑀)) |
30 | 3, 28, 29 | syl2anc 411 | . . . 4 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑀)(𝐹‘𝑘) = (𝐹‘𝑀)) |
31 | 18, 22, 30 | 3eqtr2d 2216 | . . 3 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...((𝑀 + 1) − 1))𝐴 = (𝐹‘𝑀)) |
32 | 31 | oveq1d 5890 | . 2 ⊢ (𝜑 → (Σ𝑘 ∈ (𝑀...((𝑀 + 1) − 1))𝐴 + Σ𝑘 ∈ (ℤ≥‘(𝑀 + 1))𝐴) = ((𝐹‘𝑀) + Σ𝑘 ∈ (ℤ≥‘(𝑀 + 1))𝐴)) |
33 | 12, 32 | eqtrd 2210 | 1 ⊢ (𝜑 → Σ𝑘 ∈ 𝑍 𝐴 = ((𝐹‘𝑀) + Σ𝑘 ∈ (ℤ≥‘(𝑀 + 1))𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 104 = wceq 1353 ∈ wcel 2148 dom cdm 4627 ‘cfv 5217 (class class class)co 5875 ℂcc 7809 1c1 7812 + caddc 7814 − cmin 8128 ℤcz 9253 ℤ≥cuz 9528 ...cfz 10008 seqcseq 10445 ⇝ cli 11286 Σcsu 11361 |
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 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-coll 4119 ax-sep 4122 ax-nul 4130 ax-pow 4175 ax-pr 4210 ax-un 4434 ax-setind 4537 ax-iinf 4588 ax-cnex 7902 ax-resscn 7903 ax-1cn 7904 ax-1re 7905 ax-icn 7906 ax-addcl 7907 ax-addrcl 7908 ax-mulcl 7909 ax-mulrcl 7910 ax-addcom 7911 ax-mulcom 7912 ax-addass 7913 ax-mulass 7914 ax-distr 7915 ax-i2m1 7916 ax-0lt1 7917 ax-1rid 7918 ax-0id 7919 ax-rnegex 7920 ax-precex 7921 ax-cnre 7922 ax-pre-ltirr 7923 ax-pre-ltwlin 7924 ax-pre-lttrn 7925 ax-pre-apti 7926 ax-pre-ltadd 7927 ax-pre-mulgt0 7928 ax-pre-mulext 7929 ax-arch 7930 ax-caucvg 7931 |
This theorem depends on definitions: df-bi 117 df-dc 835 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-nel 2443 df-ral 2460 df-rex 2461 df-reu 2462 df-rmo 2463 df-rab 2464 df-v 2740 df-sbc 2964 df-csb 3059 df-dif 3132 df-un 3134 df-in 3136 df-ss 3143 df-nul 3424 df-if 3536 df-pw 3578 df-sn 3599 df-pr 3600 df-op 3602 df-uni 3811 df-int 3846 df-iun 3889 df-br 4005 df-opab 4066 df-mpt 4067 df-tr 4103 df-id 4294 df-po 4297 df-iso 4298 df-iord 4367 df-on 4369 df-ilim 4370 df-suc 4372 df-iom 4591 df-xp 4633 df-rel 4634 df-cnv 4635 df-co 4636 df-dm 4637 df-rn 4638 df-res 4639 df-ima 4640 df-iota 5179 df-fun 5219 df-fn 5220 df-f 5221 df-f1 5222 df-fo 5223 df-f1o 5224 df-fv 5225 df-isom 5226 df-riota 5831 df-ov 5878 df-oprab 5879 df-mpo 5880 df-1st 6141 df-2nd 6142 df-recs 6306 df-irdg 6371 df-frec 6392 df-1o 6417 df-oadd 6421 df-er 6535 df-en 6741 df-dom 6742 df-fin 6743 df-pnf 7994 df-mnf 7995 df-xr 7996 df-ltxr 7997 df-le 7998 df-sub 8130 df-neg 8131 df-reap 8532 df-ap 8539 df-div 8630 df-inn 8920 df-2 8978 df-3 8979 df-4 8980 df-n0 9177 df-z 9254 df-uz 9529 df-q 9620 df-rp 9654 df-fz 10009 df-fzo 10143 df-seqfrec 10446 df-exp 10520 df-ihash 10756 df-cj 10851 df-re 10852 df-im 10853 df-rsqrt 11007 df-abs 11008 df-clim 11287 df-sumdc 11362 |
This theorem is referenced by: isumnn0nn 11501 efsep 11699 |
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