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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 12802 | . . . 4 ⊢ ℕ = (ℤ≥‘1) | |
| 2 | 1z 12533 | . . . . 5 ⊢ 1 ∈ ℤ | |
| 3 | 2 | a1i 11 | . . . 4 ⊢ (⊤ → 1 ∈ ℤ) |
| 4 | 0ss 4354 | . . . . 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 11138 | . . . . . . 7 ⊢ 0 ∈ V | |
| 9 | 8 | fvconst2 7160 | . . . . . 6 ⊢ (𝑘 ∈ (ℤ≥‘1) → (((ℤ≥‘1) × {0})‘𝑘) = 0) |
| 10 | 7, 9 | syl 17 | . . . . 5 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → (((ℤ≥‘1) × {0})‘𝑘) = 0) |
| 11 | noel 4292 | . . . . . 6 ⊢ ¬ 𝑘 ∈ ∅ | |
| 12 | 11 | iffalsei 4491 | . . . . 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 15653 | . . 3 ⊢ (⊤ → Σ𝑘 ∈ ∅ 𝐴 = ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0})))) |
| 17 | 16 | mptru 1549 | . 2 ⊢ Σ𝑘 ∈ ∅ 𝐴 = ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0}))) |
| 18 | fclim 15488 | . . . 4 ⊢ ⇝ :dom ⇝ ⟶ℂ | |
| 19 | ffun 6673 | . . . 4 ⊢ ( ⇝ :dom ⇝ ⟶ℂ → Fun ⇝ ) | |
| 20 | 18, 19 | ax-mp 5 | . . 3 ⊢ Fun ⇝ |
| 21 | serclim0 15512 | . . . 4 ⊢ (1 ∈ ℤ → seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0) | |
| 22 | 2, 21 | ax-mp 5 | . . 3 ⊢ seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0 |
| 23 | funbrfv 6890 | . . 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 3903 ∅c0 4287 ifcif 4481 {csn 4582 class class class wbr 5100 × cxp 5630 dom cdm 5632 Fun wfun 6494 ⟶wf 6496 ‘cfv 6500 ℂcc 11036 0cc0 11038 1c1 11039 + caddc 11041 ℕcn 12157 ℤcz 12500 ℤ≥cuz 12763 seqcseq 13936 ⇝ cli 15419 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: sumz 15657 fsumf1o 15658 fsumcllem 15667 fsumadd 15675 fsum2d 15706 fsumrev2 15717 fsummulc2 15719 fsumconst 15725 modfsummod 15729 fsumabs 15736 telfsumo 15737 fsumparts 15741 fsumrelem 15742 fsumrlim 15746 fsumo1 15747 fsumiun 15756 isumsplit 15775 arisum 15795 arisum2 15796 pwdif 15803 bpoly0 15985 sumeven 16326 sumodd 16327 bitsinv1 16381 bitsinvp1 16388 prmreclem4 16859 prmreclem5 16860 gsumfsum 21401 fsumcn 24829 ovolfiniun 25470 volfiniun 25516 itg10 25657 itgfsum 25796 dvmptfsum 25947 abelthlem6 26414 logfac 26578 log2ublem3 26926 harmonicbnd3 26986 cht1 27143 dchrisumlem1 27468 dchrisumlem3 27470 logdivbnd 27535 pntrsumbnd2 27546 pntrlog2bndlem4 27559 finsumvtxdg2size 29636 deg1prod 33675 esumpcvgval 34255 signsvf0 34757 signsvf1 34758 repr0 34788 breprexplemc 34809 tgoldbachgtda 34838 mettrifi 38005 rrncmslem 38080 deg1gprod 42507 sumcubes 42680 mccl 45955 dvmptfprod 46300 dvnprodlem3 46303 sge0rnn0 46723 sge00 46731 sge0sn 46734 |
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