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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 15682 and fsump1i 15704, which should make our notation clear and from which, along with closure fsumcl 15668, 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 2820 | . . . . . 6 ⊢ (𝑚 = 𝑘 → (𝑚 ∈ (𝑀...𝑁) ↔ 𝑘 ∈ (𝑀...𝑁))) | |
| 2 | fveq2 6842 | . . . . . 6 ⊢ (𝑚 = 𝑘 → (𝐹‘𝑚) = (𝐹‘𝑘)) | |
| 3 | 1, 2 | ifbieq1d 4506 | . . . . 5 ⊢ (𝑚 = 𝑘 → if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0) = if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0)) |
| 4 | eqid 2737 | . . . . 5 ⊢ (𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0)) = (𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0)) | |
| 5 | fvex 6855 | . . . . . 6 ⊢ (𝐹‘𝑘) ∈ V | |
| 6 | c0ex 11138 | . . . . . 6 ⊢ 0 ∈ V | |
| 7 | 5, 6 | ifex 4532 | . . . . 5 ⊢ if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0) ∈ V |
| 8 | 3, 4, 7 | fvmpt 6949 | . . . 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 4513 | . . . 4 ⊢ (𝜑 → if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0) = if(𝑘 ∈ (𝑀...𝑁), 𝐴, 0)) |
| 11 | 8, 10 | sylan9eqr 2794 | . . 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 3959 | . . 3 ⊢ (𝜑 → (𝑀...𝑁) ⊆ (𝑀...𝑁)) | |
| 15 | 11, 12, 13, 14 | fsumsers 15663 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑁)𝐴 = (seq𝑀( + , (𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0)))‘𝑁)) |
| 16 | elfzuz 13448 | . . . . . 6 ⊢ (𝑘 ∈ (𝑀...𝑁) → 𝑘 ∈ (ℤ≥‘𝑀)) | |
| 17 | 16, 8 | syl 17 | . . . . 5 ⊢ (𝑘 ∈ (𝑀...𝑁) → ((𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0))‘𝑘) = if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0)) |
| 18 | iftrue 4487 | . . . . 5 ⊢ (𝑘 ∈ (𝑀...𝑁) → if(𝑘 ∈ (𝑀...𝑁), (𝐹‘𝑘), 0) = (𝐹‘𝑘)) | |
| 19 | 17, 18 | eqtrd 2772 | . . . 4 ⊢ (𝑘 ∈ (𝑀...𝑁) → ((𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0))‘𝑘) = (𝐹‘𝑘)) |
| 20 | 19 | adantl 481 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → ((𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0))‘𝑘) = (𝐹‘𝑘)) |
| 21 | 12, 20 | seqfveq 13961 | . 2 ⊢ (𝜑 → (seq𝑀( + , (𝑚 ∈ (ℤ≥‘𝑀) ↦ if(𝑚 ∈ (𝑀...𝑁), (𝐹‘𝑚), 0)))‘𝑁) = (seq𝑀( + , 𝐹)‘𝑁)) |
| 22 | 15, 21 | eqtrd 2772 | 1 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑁)𝐴 = (seq𝑀( + , 𝐹)‘𝑁)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ifcif 4481 ↦ cmpt 5181 ‘cfv 6500 (class class class)co 7368 ℂcc 11036 0cc0 11038 + caddc 11041 ℤ≥cuz 12763 ...cfz 13435 seqcseq 13936 Σcsu 15621 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-inf2 9562 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-se 5586 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-isom 6509 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-om 7819 df-1st 7943 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-1o 8407 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-sup 9357 df-oi 9427 df-card 9863 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-nn 12158 df-2 12220 df-3 12221 df-n0 12414 df-z 12501 df-uz 12764 df-rp 12918 df-fz 13436 df-fzo 13583 df-seq 13937 df-exp 13997 df-hash 14266 df-cj 15034 df-re 15035 df-im 15036 df-sqrt 15170 df-abs 15171 df-clim 15423 df-sum 15622 |
| This theorem is referenced by: isumclim3 15694 seqabs 15749 cvgcmpce 15753 isumsplit 15775 climcndslem1 15784 climcndslem2 15785 climcnds 15786 trireciplem 15797 geolim 15805 geo2lim 15810 mertenslem2 15820 mertens 15821 efcvgfsum 16021 effsumlt 16048 prmreclem6 16861 prmrec 16862 ovollb2lem 25457 ovoliunlem1 25471 ovoliun2 25475 ovolscalem1 25482 ovolicc2lem4 25489 uniioovol 25548 uniioombllem3 25554 uniioombllem6 25557 mtest 26381 mtestbdd 26382 psercn2 26400 psercn2OLD 26401 pserdvlem2 26406 abelthlem6 26414 logfac 26578 emcllem5 26978 lgamcvg2 27033 basellem8 27066 prmorcht 27156 pclogsum 27194 dchrisumlem2 27469 dchrmusum2 27473 dchrvmasumiflem1 27480 dchrisum0re 27492 dchrisum0lem1b 27494 dchrisum0lem2a 27496 dchrisum0lem2 27497 esumpcvgval 34256 esumcvg 34264 esumcvgsum 34266 knoppcnlem11 36725 fsumsermpt 45939 sumnnodd 45990 fourierdlem112 46576 sge0isum 46785 sge0seq 46804 |
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