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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 12621 | . . . 4 ⊢ ℕ = (ℤ≥‘1) | |
2 | 1z 12350 | . . . . 5 ⊢ 1 ∈ ℤ | |
3 | 2 | a1i 11 | . . . 4 ⊢ (⊤ → 1 ∈ ℤ) |
4 | 0ss 4330 | . . . . 5 ⊢ ∅ ⊆ ℕ | |
5 | 4 | a1i 11 | . . . 4 ⊢ (⊤ → ∅ ⊆ ℕ) |
6 | simpr 485 | . . . . . . 7 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℕ) | |
7 | 6, 1 | eleqtrdi 2849 | . . . . . 6 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ (ℤ≥‘1)) |
8 | c0ex 10969 | . . . . . . 7 ⊢ 0 ∈ V | |
9 | 8 | fvconst2 7079 | . . . . . 6 ⊢ (𝑘 ∈ (ℤ≥‘1) → (((ℤ≥‘1) × {0})‘𝑘) = 0) |
10 | 7, 9 | syl 17 | . . . . 5 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → (((ℤ≥‘1) × {0})‘𝑘) = 0) |
11 | noel 4264 | . . . . . 6 ⊢ ¬ 𝑘 ∈ ∅ | |
12 | 11 | iffalsei 4469 | . . . . 5 ⊢ if(𝑘 ∈ ∅, 𝐴, 0) = 0 |
13 | 10, 12 | eqtr4di 2796 | . . . 4 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → (((ℤ≥‘1) × {0})‘𝑘) = if(𝑘 ∈ ∅, 𝐴, 0)) |
14 | 11 | pm2.21i 119 | . . . . 5 ⊢ (𝑘 ∈ ∅ → 𝐴 ∈ ℂ) |
15 | 14 | adantl 482 | . . . 4 ⊢ ((⊤ ∧ 𝑘 ∈ ∅) → 𝐴 ∈ ℂ) |
16 | 1, 3, 5, 13, 15 | zsum 15430 | . . 3 ⊢ (⊤ → Σ𝑘 ∈ ∅ 𝐴 = ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0})))) |
17 | 16 | mptru 1546 | . 2 ⊢ Σ𝑘 ∈ ∅ 𝐴 = ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0}))) |
18 | fclim 15262 | . . . 4 ⊢ ⇝ :dom ⇝ ⟶ℂ | |
19 | ffun 6603 | . . . 4 ⊢ ( ⇝ :dom ⇝ ⟶ℂ → Fun ⇝ ) | |
20 | 18, 19 | ax-mp 5 | . . 3 ⊢ Fun ⇝ |
21 | serclim0 15286 | . . . 4 ⊢ (1 ∈ ℤ → seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0) | |
22 | 2, 21 | ax-mp 5 | . . 3 ⊢ seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0 |
23 | funbrfv 6820 | . . 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 2766 | 1 ⊢ Σ𝑘 ∈ ∅ 𝐴 = 0 |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 396 = wceq 1539 ⊤wtru 1540 ∈ wcel 2106 ⊆ wss 3887 ∅c0 4256 ifcif 4459 {csn 4561 class class class wbr 5074 × cxp 5587 dom cdm 5589 Fun wfun 6427 ⟶wf 6429 ‘cfv 6433 ℂcc 10869 0cc0 10871 1c1 10872 + caddc 10874 ℕcn 11973 ℤcz 12319 ℤ≥cuz 12582 seqcseq 13721 ⇝ cli 15193 Σcsu 15397 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-inf2 9399 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-sup 9201 df-oi 9269 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-rp 12731 df-fz 13240 df-fzo 13383 df-seq 13722 df-exp 13783 df-hash 14045 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-clim 15197 df-sum 15398 |
This theorem is referenced by: sumz 15434 fsumf1o 15435 fsumcllem 15444 fsumadd 15452 fsum2d 15483 fsumrev2 15494 fsummulc2 15496 fsumconst 15502 modfsummod 15506 fsumabs 15513 telfsumo 15514 fsumparts 15518 fsumrelem 15519 fsumrlim 15523 fsumo1 15524 fsumiun 15533 isumsplit 15552 arisum 15572 arisum2 15573 pwdif 15580 bpoly0 15760 sumeven 16096 sumodd 16097 bitsinv1 16149 bitsinvp1 16156 prmreclem4 16620 prmreclem5 16621 gsumfsum 20665 fsumcn 24033 ovolfiniun 24665 volfiniun 24711 itg10 24852 itgfsum 24991 dvmptfsum 25139 abelthlem6 25595 logfac 25756 log2ublem3 26098 harmonicbnd3 26157 cht1 26314 dchrisumlem1 26637 dchrisumlem3 26639 logdivbnd 26704 pntrsumbnd2 26715 pntrlog2bndlem4 26728 finsumvtxdg2size 27917 esumpcvgval 32046 signsvf0 32559 signsvf1 32560 repr0 32591 breprexplemc 32612 tgoldbachgtda 32641 mettrifi 35915 rrncmslem 35990 mccl 43139 dvmptfprod 43486 dvnprodlem3 43489 sge0rnn0 43906 sge00 43914 sge0sn 43917 |
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