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| Mirrors > Home > MPE Home > Th. List > sum0 | Structured version Visualization version GIF version | ||
| Description: Any sum over the empty set is zero. (Contributed by Mario Carneiro, 12-Aug-2013.) (Revised by Mario Carneiro, 20-Apr-2014.) |
| Ref | Expression |
|---|---|
| sum0 | ⊢ Σ𝑘 ∈ ∅ 𝐴 = 0 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnuz 12818 | . . . 4 ⊢ ℕ = (ℤ≥‘1) | |
| 2 | 1z 12548 | . . . . 5 ⊢ 1 ∈ ℤ | |
| 3 | 2 | a1i 11 | . . . 4 ⊢ (⊤ → 1 ∈ ℤ) |
| 4 | 0ss 4341 | . . . . 5 ⊢ ∅ ⊆ ℕ | |
| 5 | 4 | a1i 11 | . . . 4 ⊢ (⊤ → ∅ ⊆ ℕ) |
| 6 | simpr 484 | . . . . . . 7 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℕ) | |
| 7 | 6, 1 | eleqtrdi 2847 | . . . . . 6 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ (ℤ≥‘1)) |
| 8 | c0ex 11129 | . . . . . . 7 ⊢ 0 ∈ V | |
| 9 | 8 | fvconst2 7152 | . . . . . 6 ⊢ (𝑘 ∈ (ℤ≥‘1) → (((ℤ≥‘1) × {0})‘𝑘) = 0) |
| 10 | 7, 9 | syl 17 | . . . . 5 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → (((ℤ≥‘1) × {0})‘𝑘) = 0) |
| 11 | noel 4279 | . . . . . 6 ⊢ ¬ 𝑘 ∈ ∅ | |
| 12 | 11 | iffalsei 4477 | . . . . 5 ⊢ if(𝑘 ∈ ∅, 𝐴, 0) = 0 |
| 13 | 10, 12 | eqtr4di 2790 | . . . 4 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → (((ℤ≥‘1) × {0})‘𝑘) = if(𝑘 ∈ ∅, 𝐴, 0)) |
| 14 | 11 | pm2.21i 119 | . . . . 5 ⊢ (𝑘 ∈ ∅ → 𝐴 ∈ ℂ) |
| 15 | 14 | adantl 481 | . . . 4 ⊢ ((⊤ ∧ 𝑘 ∈ ∅) → 𝐴 ∈ ℂ) |
| 16 | 1, 3, 5, 13, 15 | zsum 15671 | . . 3 ⊢ (⊤ → Σ𝑘 ∈ ∅ 𝐴 = ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0})))) |
| 17 | 16 | mptru 1549 | . 2 ⊢ Σ𝑘 ∈ ∅ 𝐴 = ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0}))) |
| 18 | fclim 15506 | . . . 4 ⊢ ⇝ :dom ⇝ ⟶ℂ | |
| 19 | ffun 6665 | . . . 4 ⊢ ( ⇝ :dom ⇝ ⟶ℂ → Fun ⇝ ) | |
| 20 | 18, 19 | ax-mp 5 | . . 3 ⊢ Fun ⇝ |
| 21 | serclim0 15530 | . . . 4 ⊢ (1 ∈ ℤ → seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0) | |
| 22 | 2, 21 | ax-mp 5 | . . 3 ⊢ seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0 |
| 23 | funbrfv 6882 | . . 3 ⊢ (Fun ⇝ → (seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0 → ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0}))) = 0)) | |
| 24 | 20, 22, 23 | mp2 9 | . 2 ⊢ ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0}))) = 0 |
| 25 | 17, 24 | eqtri 2760 | 1 ⊢ Σ𝑘 ∈ ∅ 𝐴 = 0 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 = wceq 1542 ⊤wtru 1543 ∈ wcel 2114 ⊆ wss 3890 ∅c0 4274 ifcif 4467 {csn 4568 class class class wbr 5086 × cxp 5622 dom cdm 5624 Fun wfun 6486 ⟶wf 6488 ‘cfv 6492 ℂcc 11027 0cc0 11029 1c1 11030 + caddc 11032 ℕcn 12165 ℤcz 12515 ℤ≥cuz 12779 seqcseq 13954 ⇝ cli 15437 Σcsu 15639 |
| 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 5212 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-inf2 9553 ax-cnex 11085 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 ax-pre-sup 11107 |
| 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 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-se 5578 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-isom 6501 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-1o 8398 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-fin 8890 df-sup 9348 df-oi 9418 df-card 9854 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-div 11799 df-nn 12166 df-2 12235 df-3 12236 df-n0 12429 df-z 12516 df-uz 12780 df-rp 12934 df-fz 13453 df-fzo 13600 df-seq 13955 df-exp 14015 df-hash 14284 df-cj 15052 df-re 15053 df-im 15054 df-sqrt 15188 df-abs 15189 df-clim 15441 df-sum 15640 |
| This theorem is referenced by: sumz 15675 fsumf1o 15676 fsumcllem 15685 fsumadd 15693 fsum2d 15724 fsumrev2 15735 fsummulc2 15737 fsumconst 15743 modfsummod 15748 fsumabs 15755 telfsumo 15756 fsumparts 15760 fsumrelem 15761 fsumrlim 15765 fsumo1 15766 fsumiun 15775 isumsplit 15796 arisum 15816 arisum2 15817 pwdif 15824 bpoly0 16006 sumeven 16347 sumodd 16348 bitsinv1 16402 bitsinvp1 16409 prmreclem4 16881 prmreclem5 16882 gsumfsum 21424 fsumcn 24847 ovolfiniun 25478 volfiniun 25524 itg10 25665 itgfsum 25804 dvmptfsum 25952 abelthlem6 26414 logfac 26578 log2ublem3 26925 harmonicbnd3 26985 cht1 27142 dchrisumlem1 27466 dchrisumlem3 27468 logdivbnd 27533 pntrsumbnd2 27544 pntrlog2bndlem4 27557 finsumvtxdg2size 29634 deg1prod 33658 esumpcvgval 34238 signsvf0 34740 signsvf1 34741 repr0 34771 breprexplemc 34792 tgoldbachgtda 34821 mettrifi 38092 rrncmslem 38167 deg1gprod 42593 sumcubes 42759 mccl 46046 dvmptfprod 46391 dvnprodlem3 46394 sge0rnn0 46814 sge00 46822 sge0sn 46825 ppi1sum 48106 |
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