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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 12269 | . . . 4 ⊢ ℕ = (ℤ≥‘1) | |
2 | 1z 12000 | . . . . 5 ⊢ 1 ∈ ℤ | |
3 | 2 | a1i 11 | . . . 4 ⊢ (⊤ → 1 ∈ ℤ) |
4 | 0ss 4304 | . . . . 5 ⊢ ∅ ⊆ ℕ | |
5 | 4 | a1i 11 | . . . 4 ⊢ (⊤ → ∅ ⊆ ℕ) |
6 | simpr 488 | . . . . . . 7 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℕ) | |
7 | 6, 1 | eleqtrdi 2900 | . . . . . 6 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ (ℤ≥‘1)) |
8 | c0ex 10624 | . . . . . . 7 ⊢ 0 ∈ V | |
9 | 8 | fvconst2 6943 | . . . . . 6 ⊢ (𝑘 ∈ (ℤ≥‘1) → (((ℤ≥‘1) × {0})‘𝑘) = 0) |
10 | 7, 9 | syl 17 | . . . . 5 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → (((ℤ≥‘1) × {0})‘𝑘) = 0) |
11 | noel 4247 | . . . . . 6 ⊢ ¬ 𝑘 ∈ ∅ | |
12 | 11 | iffalsei 4435 | . . . . 5 ⊢ if(𝑘 ∈ ∅, 𝐴, 0) = 0 |
13 | 10, 12 | eqtr4di 2851 | . . . 4 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → (((ℤ≥‘1) × {0})‘𝑘) = if(𝑘 ∈ ∅, 𝐴, 0)) |
14 | 11 | pm2.21i 119 | . . . . 5 ⊢ (𝑘 ∈ ∅ → 𝐴 ∈ ℂ) |
15 | 14 | adantl 485 | . . . 4 ⊢ ((⊤ ∧ 𝑘 ∈ ∅) → 𝐴 ∈ ℂ) |
16 | 1, 3, 5, 13, 15 | zsum 15067 | . . 3 ⊢ (⊤ → Σ𝑘 ∈ ∅ 𝐴 = ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0})))) |
17 | 16 | mptru 1545 | . 2 ⊢ Σ𝑘 ∈ ∅ 𝐴 = ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0}))) |
18 | fclim 14902 | . . . 4 ⊢ ⇝ :dom ⇝ ⟶ℂ | |
19 | ffun 6490 | . . . 4 ⊢ ( ⇝ :dom ⇝ ⟶ℂ → Fun ⇝ ) | |
20 | 18, 19 | ax-mp 5 | . . 3 ⊢ Fun ⇝ |
21 | serclim0 14926 | . . . 4 ⊢ (1 ∈ ℤ → seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0) | |
22 | 2, 21 | ax-mp 5 | . . 3 ⊢ seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0 |
23 | funbrfv 6691 | . . 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 2821 | 1 ⊢ Σ𝑘 ∈ ∅ 𝐴 = 0 |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 399 = wceq 1538 ⊤wtru 1539 ∈ wcel 2111 ⊆ wss 3881 ∅c0 4243 ifcif 4425 {csn 4525 class class class wbr 5030 × cxp 5517 dom cdm 5519 Fun wfun 6318 ⟶wf 6320 ‘cfv 6324 ℂcc 10524 0cc0 10526 1c1 10527 + caddc 10529 ℕcn 11625 ℤcz 11969 ℤ≥cuz 12231 seqcseq 13364 ⇝ cli 14833 Σcsu 15034 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-rep 5154 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-inf2 9088 ax-cnex 10582 ax-resscn 10583 ax-1cn 10584 ax-icn 10585 ax-addcl 10586 ax-addrcl 10587 ax-mulcl 10588 ax-mulrcl 10589 ax-mulcom 10590 ax-addass 10591 ax-mulass 10592 ax-distr 10593 ax-i2m1 10594 ax-1ne0 10595 ax-1rid 10596 ax-rnegex 10597 ax-rrecex 10598 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 ax-pre-ltadd 10602 ax-pre-mulgt0 10603 ax-pre-sup 10604 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-reu 3113 df-rmo 3114 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-int 4839 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-se 5479 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-pred 6116 df-ord 6162 df-on 6163 df-lim 6164 df-suc 6165 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-isom 6333 df-riota 7093 df-ov 7138 df-oprab 7139 df-mpo 7140 df-om 7561 df-1st 7671 df-2nd 7672 df-wrecs 7930 df-recs 7991 df-rdg 8029 df-1o 8085 df-oadd 8089 df-er 8272 df-en 8493 df-dom 8494 df-sdom 8495 df-fin 8496 df-sup 8890 df-oi 8958 df-card 9352 df-pnf 10666 df-mnf 10667 df-xr 10668 df-ltxr 10669 df-le 10670 df-sub 10861 df-neg 10862 df-div 11287 df-nn 11626 df-2 11688 df-3 11689 df-n0 11886 df-z 11970 df-uz 12232 df-rp 12378 df-fz 12886 df-fzo 13029 df-seq 13365 df-exp 13426 df-hash 13687 df-cj 14450 df-re 14451 df-im 14452 df-sqrt 14586 df-abs 14587 df-clim 14837 df-sum 15035 |
This theorem is referenced by: sumz 15071 fsumf1o 15072 fsumcllem 15081 fsumadd 15088 fsum2d 15118 fsumrev2 15129 fsummulc2 15131 fsumconst 15137 modfsummod 15141 fsumabs 15148 telfsumo 15149 fsumparts 15153 fsumrelem 15154 fsumrlim 15158 fsumo1 15159 fsumiun 15168 isumsplit 15187 arisum 15207 arisum2 15208 pwdif 15215 bpoly0 15396 sumeven 15728 sumodd 15729 bitsinv1 15781 bitsinvp1 15788 prmreclem4 16245 prmreclem5 16246 gsumfsum 20158 fsumcn 23475 ovolfiniun 24105 volfiniun 24151 itg10 24292 itgfsum 24430 dvmptfsum 24578 abelthlem6 25031 logfac 25192 log2ublem3 25534 harmonicbnd3 25593 cht1 25750 dchrisumlem1 26073 dchrisumlem3 26075 logdivbnd 26140 pntrsumbnd2 26151 pntrlog2bndlem4 26164 finsumvtxdg2size 27340 esumpcvgval 31447 signsvf0 31960 signsvf1 31961 repr0 31992 breprexplemc 32013 tgoldbachgtda 32042 mettrifi 35195 rrncmslem 35270 mccl 42240 dvmptfprod 42587 dvnprodlem3 42590 sge0rnn0 43007 sge00 43015 sge0sn 43018 |
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