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| Mirrors > Home > MPE Home > Th. List > fsumser | Structured version Visualization version GIF version | ||
| Description: A finite sum expressed in terms of a partial sum of an infinite series. The recursive definition follows as fsum1 15914 and fsump1i 15936, which should make our notation clear and from which, along with closure fsumcl 15900, we will derive the basic properties of finite sums. (Contributed by NM, 11-Dec-2005.) (Revised by Mario Carneiro, 21-Apr-2014.) |
| Ref | Expression |
|---|---|
| fsumser.1 | ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → (𝐹‘𝑘) = 𝐴) |
| fsumser.2 | ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀)) |
| fsumser.3 | ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → 𝐴 ∈ ℂ) |
| Ref | Expression |
|---|---|
| fsumser | ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑁)𝐴 = (seq𝑀( + , 𝐹)‘𝑁)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq1w 2844 | . . . . . 6 ⊢ (𝑚 = 𝑘 → (𝑚 ∈ (𝑀...𝑁) ↔ 𝑘 ∈ (𝑀...𝑁))) | |
| 2 | fveq2 6886 | . . . . . 6 ⊢ (𝑚 = 𝑘 → (𝐹‘𝑚) = (𝐹‘𝑘)) | |
| 3 | 1, 2 | ifbieq1d 4507 | . . . . 5 ⊢ (𝑚 = 𝑘 → if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0) = if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0)) |
| 4 | eqid 2761 | . . . . 5 ⊢ (𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0)) = (𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0)) | |
| 5 | fvex 6899 | . . . . . 6 ⊢ (𝐹‘𝑘) ∈ V | |
| 6 | c0ex 11301 | . . . . . 6 ⊢ 0 ∈ V | |
| 7 | 5, 6 | ifex 4533 | . . . . 5 ⊢ if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0) ∈ V |
| 8 | 3, 4, 7 | fvmpt 6994 | . . . 4 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → ((𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0))‘𝑘) = if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0)) |
| 9 | fsumser.1 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → (𝐹‘𝑘) = 𝐴) | |
| 10 | 9 | ifeq1da 4514 | . . . 4 ⊢ (𝜑 → if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0) = if(𝑘 ∈ (𝑀...𝑁), 𝐴, 0)) |
| 11 | 8, 10 | sylan9eqr 2818 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → ((𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0))‘𝑘) = if(𝑘 ∈ (𝑀...𝑁), 𝐴, 0)) |
| 12 | fsumser.2 | . . 3 ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀)) | |
| 13 | fsumser.3 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → 𝐴 ∈ ℂ) | |
| 14 | ssidd 3952 | . . 3 ⊢ (𝜑 → (𝑀...𝑁) ⊆ (𝑀...𝑁)) | |
| 15 | 11, 12, 13, 14 | fsumsers 15895 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑁)𝐴 = (seq𝑀( + , (𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0)))‘𝑁)) |
| 16 | elfzuz 13653 | . . . . . 6 ⊢ (𝑘 ∈ (𝑀...𝑁) → 𝑘 ∈ (ℤ≥‘𝑀)) | |
| 17 | 16, 8 | syl 18 | . . . . 5 ⊢ (𝑘 ∈ (𝑀...𝑁) → ((𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0))‘𝑘) = if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0)) |
| 18 | iftrue 4488 | . . . . 5 ⊢ (𝑘 ∈ (𝑀...𝑁) → if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0) = (𝐹‘𝑘)) | |
| 19 | 17, 18 | eqtrd 2796 | . . . 4 ⊢ (𝑘 ∈ (𝑀...𝑁) → ((𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0))‘𝑘) = (𝐹‘𝑘)) |
| 20 | 19 | adantl 487 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → ((𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0))‘𝑘) = (𝐹‘𝑘)) |
| 21 | 12, 20 | seqfveq 14170 | . 2 ⊢ (𝜑 → (seq𝑀( + , (𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0)))‘𝑁) = (seq𝑀( + , 𝐹)‘𝑁)) |
| 22 | 15, 21 | eqtrd 2796 | 1 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑁)𝐴 = (seq𝑀( + , 𝐹)‘𝑁)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ifcif 4482 ↦ cmpt 5186 ‘cfv 6539 (class class class)co 7421 ℂcc 11199 0cc0 11201 + caddc 11204 ℤ≥cuz 12966 ...cfz 13640 seqcseq 14145 Σcsu 15854 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7752 ax-inf2 9643 ax-cnex 11257 ax-resscn 11258 ax-1cn 11259 ax-icn 11260 ax-addcl 11261 ax-addrcl 11262 ax-mulcl 11263 ax-mulrcl 11264 ax-mulcom 11265 ax-addass 11266 ax-mulass 11267 ax-distr 11268 ax-i2m1 11269 ax-1ne0 11270 ax-1rid 11271 ax-rnegex 11272 ax-rrecex 11273 ax-cnre 11274 ax-pre-lttri 11275 ax-pre-lttrn 11276 ax-pre-ltadd 11277 ax-pre-mulgt0 11278 ax-pre-sup 11279 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3900 df-un 3902 df-in 3904 df-ss 3915 df-pss 4035 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6305 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-isom 6548 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-om 7879 df-1st 8002 df-2nd 8003 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-1o 8477 df-er 8718 df-en 8975 df-dom 8976 df-sdom 8977 df-fin 8978 df-sup 9435 df-oi 9505 df-card 10021 df-pnf 11346 df-mnf 11347 df-xr 11348 df-ltxr 11349 df-le 11350 df-sub 11544 df-neg 11545 df-div 11975 df-nn 12337 df-2 12406 df-3 12407 df-n0 12608 df-z 12695 df-uz 12967 df-rp 13122 df-fz 13641 df-fzo 13790 df-seq 14146 df-exp 14206 df-hash 14476 df-cj 15267 df-re 15268 df-im 15269 df-sqrt 15403 df-abs 15404 df-clim 15656 df-sum 15855 |
| This theorem is used by: isumclim3 15926 seqabs 15982 cvgcmpce 15986 isumsplit 16010 climcndslem1 16019 climcndslem2 16020 climcnds 16021 trireciplem 16032 geolim 16040 geo2lim 16045 mertenslem2 16055 mertens 16056 efcvgfsum 16253 effsumlt 16280 prmreclem6 17100 prmrec 17101 ovollb2lem 25810 ovoliunlem1 25824 ovoliun2 25828 ovolscalem1 25835 ovolicc2lem4 25842 uniioovol 25901 uniioombllem3 25907 uniioombllem6 25910 mtest 26732 mtestbdd 26733 psercn2 26751 pserdvlem2 26756 abelthlem6 26764 logfac 26930 emcllem5 27328 lgamcvg2 27383 basellem8 27416 prmorcht 27506 pclogsum 27543 dchrisumlem2 27818 dchrmusum2 27822 dchrvmasumiflem1 27829 dchrisum0re 27841 dchrisum0lem1b 27843 dchrisum0lem2a 27845 dchrisum0lem2 27846 esumpcvgval 34711 esumcvg 34719 esumcvgsum 34721 knoppcnlem11 37370 fsumsermpt 46592 sumnnodd 46643 fourierdlem112 47229 sge0isum 47438 sge0seq 47457 |
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