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| Mirrors > Home > MPE Home > Th. List > sumss2 | Structured version Visualization version GIF version | ||
| Description: Change the index set of a sum by adding zeroes. (Contributed by Mario Carneiro, 15-Jul-2013.) (Revised by Mario Carneiro, 20-Apr-2014.) |
| Ref | Expression |
|---|---|
| sumss2 | ⊢ (((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ (𝐵 ⊆ (ℤ≥‘𝑀) ∨ 𝐵 ∈ Fin)) → Σ𝑘 ∈ 𝐴 𝐶 = Σ𝑘 ∈ 𝐵 if(𝑘 ∈ 𝐴, 𝐶, 0)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpll 766 | . . . 4 ⊢ (((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ 𝐵 ⊆ (ℤ≥‘𝑀)) → 𝐴 ⊆ 𝐵) | |
| 2 | iftrue 4482 | . . . . . . 7 ⊢ (𝑚 ∈ 𝐴 → if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) = ⦋𝑚 / 𝑘⦌𝐶) | |
| 3 | 2 | adantl 481 | . . . . . 6 ⊢ ((∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ ∧ 𝑚 ∈ 𝐴) → if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) = ⦋𝑚 / 𝑘⦌𝐶) |
| 4 | nfcsb1v 3870 | . . . . . . . . 9 ⊢ Ⅎ𝑘⦋𝑚 / 𝑘⦌𝐶 | |
| 5 | 4 | nfel1 2912 | . . . . . . . 8 ⊢ Ⅎ𝑘⦋𝑚 / 𝑘⦌𝐶 ∈ ℂ |
| 6 | csbeq1a 3860 | . . . . . . . . 9 ⊢ (𝑘 = 𝑚 → 𝐶 = ⦋𝑚 / 𝑘⦌𝐶) | |
| 7 | 6 | eleq1d 2818 | . . . . . . . 8 ⊢ (𝑘 = 𝑚 → (𝐶 ∈ ℂ ↔ ⦋𝑚 / 𝑘⦌𝐶 ∈ ℂ)) |
| 8 | 5, 7 | rspc 3561 | . . . . . . 7 ⊢ (𝑚 ∈ 𝐴 → (∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ → ⦋𝑚 / 𝑘⦌𝐶 ∈ ℂ)) |
| 9 | 8 | impcom 407 | . . . . . 6 ⊢ ((∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ ∧ 𝑚 ∈ 𝐴) → ⦋𝑚 / 𝑘⦌𝐶 ∈ ℂ) |
| 10 | 3, 9 | eqeltrd 2833 | . . . . 5 ⊢ ((∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ ∧ 𝑚 ∈ 𝐴) → if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) ∈ ℂ) |
| 11 | 10 | ad4ant24 754 | . . . 4 ⊢ ((((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ 𝐵 ⊆ (ℤ≥‘𝑀)) ∧ 𝑚 ∈ 𝐴) → if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) ∈ ℂ) |
| 12 | eldifn 4081 | . . . . . 6 ⊢ (𝑚 ∈ (𝐵 ∖ 𝐴) → ¬ 𝑚 ∈ 𝐴) | |
| 13 | 12 | iffalsed 4487 | . . . . 5 ⊢ (𝑚 ∈ (𝐵 ∖ 𝐴) → if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) = 0) |
| 14 | 13 | adantl 481 | . . . 4 ⊢ ((((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ 𝐵 ⊆ (ℤ≥‘𝑀)) ∧ 𝑚 ∈ (𝐵 ∖ 𝐴)) → if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) = 0) |
| 15 | simpr 484 | . . . 4 ⊢ (((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ 𝐵 ⊆ (ℤ≥‘𝑀)) → 𝐵 ⊆ (ℤ≥‘𝑀)) | |
| 16 | 1, 11, 14, 15 | sumss 15635 | . . 3 ⊢ (((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ 𝐵 ⊆ (ℤ≥‘𝑀)) → Σ𝑚 ∈ 𝐴 if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) = Σ𝑚 ∈ 𝐵 if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0)) |
| 17 | simpll 766 | . . . 4 ⊢ (((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ 𝐵 ∈ Fin) → 𝐴 ⊆ 𝐵) | |
| 18 | 10 | ad4ant24 754 | . . . 4 ⊢ ((((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ 𝐵 ∈ Fin) ∧ 𝑚 ∈ 𝐴) → if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) ∈ ℂ) |
| 19 | 13 | adantl 481 | . . . 4 ⊢ ((((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ 𝐵 ∈ Fin) ∧ 𝑚 ∈ (𝐵 ∖ 𝐴)) → if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) = 0) |
| 20 | simpr 484 | . . . 4 ⊢ (((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ 𝐵 ∈ Fin) → 𝐵 ∈ Fin) | |
| 21 | 17, 18, 19, 20 | fsumss 15636 | . . 3 ⊢ (((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ 𝐵 ∈ Fin) → Σ𝑚 ∈ 𝐴 if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) = Σ𝑚 ∈ 𝐵 if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0)) |
| 22 | 16, 21 | jaodan 959 | . 2 ⊢ (((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ (𝐵 ⊆ (ℤ≥‘𝑀) ∨ 𝐵 ∈ Fin)) → Σ𝑚 ∈ 𝐴 if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) = Σ𝑚 ∈ 𝐵 if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0)) |
| 23 | iftrue 4482 | . . . 4 ⊢ (𝑘 ∈ 𝐴 → if(𝑘 ∈ 𝐴, 𝐶, 0) = 𝐶) | |
| 24 | 23 | sumeq2i 15609 | . . 3 ⊢ Σ𝑘 ∈ 𝐴 if(𝑘 ∈ 𝐴, 𝐶, 0) = Σ𝑘 ∈ 𝐴 𝐶 |
| 25 | eleq1w 2816 | . . . . 5 ⊢ (𝑘 = 𝑚 → (𝑘 ∈ 𝐴 ↔ 𝑚 ∈ 𝐴)) | |
| 26 | 25, 6 | ifbieq1d 4501 | . . . 4 ⊢ (𝑘 = 𝑚 → if(𝑘 ∈ 𝐴, 𝐶, 0) = if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0)) |
| 27 | nfcv 2895 | . . . 4 ⊢ Ⅎ𝑚if(𝑘 ∈ 𝐴, 𝐶, 0) | |
| 28 | nfv 1915 | . . . . 5 ⊢ Ⅎ𝑘 𝑚 ∈ 𝐴 | |
| 29 | nfcv 2895 | . . . . 5 ⊢ Ⅎ𝑘0 | |
| 30 | 28, 4, 29 | nfif 4507 | . . . 4 ⊢ Ⅎ𝑘if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) |
| 31 | 26, 27, 30 | cbvsum 15606 | . . 3 ⊢ Σ𝑘 ∈ 𝐴 if(𝑘 ∈ 𝐴, 𝐶, 0) = Σ𝑚 ∈ 𝐴 if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) |
| 32 | 24, 31 | eqtr3i 2758 | . 2 ⊢ Σ𝑘 ∈ 𝐴 𝐶 = Σ𝑚 ∈ 𝐴 if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) |
| 33 | 26, 27, 30 | cbvsum 15606 | . 2 ⊢ Σ𝑘 ∈ 𝐵 if(𝑘 ∈ 𝐴, 𝐶, 0) = Σ𝑚 ∈ 𝐵 if(𝑚 ∈ 𝐴, ⦋𝑚 / 𝑘⦌𝐶, 0) |
| 34 | 22, 32, 33 | 3eqtr4g 2793 | 1 ⊢ (((𝐴 ⊆ 𝐵 ∧ ∀𝑘 ∈ 𝐴 𝐶 ∈ ℂ) ∧ (𝐵 ⊆ (ℤ≥‘𝑀) ∨ 𝐵 ∈ Fin)) → Σ𝑘 ∈ 𝐴 𝐶 = Σ𝑘 ∈ 𝐵 if(𝑘 ∈ 𝐴, 𝐶, 0)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∨ wo 847 = wceq 1541 ∈ wcel 2113 ∀wral 3048 ⦋csb 3846 ∖ cdif 3895 ⊆ wss 3898 ifcif 4476 ‘cfv 6488 Fincfn 8877 ℂcc 11013 0cc0 11015 ℤ≥cuz 12740 Σcsu 15597 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7676 ax-inf2 9540 ax-cnex 11071 ax-resscn 11072 ax-1cn 11073 ax-icn 11074 ax-addcl 11075 ax-addrcl 11076 ax-mulcl 11077 ax-mulrcl 11078 ax-mulcom 11079 ax-addass 11080 ax-mulass 11081 ax-distr 11082 ax-i2m1 11083 ax-1ne0 11084 ax-1rid 11085 ax-rnegex 11086 ax-rrecex 11087 ax-cnre 11088 ax-pre-lttri 11089 ax-pre-lttrn 11090 ax-pre-ltadd 11091 ax-pre-mulgt0 11092 ax-pre-sup 11093 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-int 4900 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-se 5575 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6255 df-ord 6316 df-on 6317 df-lim 6318 df-suc 6319 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-isom 6497 df-riota 7311 df-ov 7357 df-oprab 7358 df-mpo 7359 df-om 7805 df-1st 7929 df-2nd 7930 df-frecs 8219 df-wrecs 8250 df-recs 8299 df-rdg 8337 df-1o 8393 df-er 8630 df-en 8878 df-dom 8879 df-sdom 8880 df-fin 8881 df-sup 9335 df-oi 9405 df-card 9841 df-pnf 11157 df-mnf 11158 df-xr 11159 df-ltxr 11160 df-le 11161 df-sub 11355 df-neg 11356 df-div 11784 df-nn 12135 df-2 12197 df-3 12198 df-n0 12391 df-z 12478 df-uz 12741 df-rp 12895 df-fz 13412 df-fzo 13559 df-seq 13913 df-exp 13973 df-hash 14242 df-cj 15010 df-re 15011 df-im 15012 df-sqrt 15146 df-abs 15147 df-clim 15399 df-sum 15598 |
| This theorem is referenced by: fsumsplit 15652 sumsplit 15679 isumless 15756 rpnnen2lem11 16137 sumhash 16812 prmrec 16838 plyeq0lem 26145 prmorcht 27118 musumsum 27132 pclogsum 27156 dchrhash 27212 rpvmasum2 27453 pntlemj 27544 plymulx0 34583 hashreprin 34656 circlemeth 34676 |
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