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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 12919 | . . . 4 ⊢ ℕ = (ℤ≥‘1) | |
| 2 | 1z 12642 | . . . . 5 ⊢ 1 ∈ ℤ | |
| 3 | 2 | a1i 11 | . . . 4 ⊢ (⊤ → 1 ∈ ℤ) |
| 4 | 0ss 4360 | . . . . 5 ⊢ ∅ ⊆ ℕ | |
| 5 | 4 | a1i 11 | . . . 4 ⊢ (⊤ → ∅ ⊆ ℕ) |
| 6 | simpr 490 | . . . . . . 7 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ ℕ) | |
| 7 | 6, 1 | eleqtrdi 2876 | . . . . . 6 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → 𝑘 ∈ (ℤ≥‘1)) |
| 8 | c0ex 11218 | . . . . . . 7 ⊢ 0 ∈ V | |
| 9 | 8 | fvconst2 7209 | . . . . . 6 ⊢ (𝑘 ∈ (ℤ≥‘1) → (((ℤ≥‘1) × {0})‘𝑘) = 0) |
| 10 | 7, 9 | syl 18 | . . . . 5 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → (((ℤ≥‘1) × {0})‘𝑘) = 0) |
| 11 | noel 4294 | . . . . . 6 ⊢ ¬ 𝑘 ∈ ∅ | |
| 12 | 11 | iffalsei 4502 | . . . . 5 ⊢ if(𝑘 ∈ ∅, 𝐴, 0) = 0 |
| 13 | 10, 12 | eqtr4di 2819 | . . . 4 ⊢ ((⊤ ∧ 𝑘 ∈ ℕ) → (((ℤ≥‘1) × {0})‘𝑘) = if(𝑘 ∈ ∅, 𝐴, 0)) |
| 14 | 11 | pm2.21i 120 | . . . . 5 ⊢ (𝑘 ∈ ∅ → 𝐴 ∈ ℂ) |
| 15 | 14 | adantl 487 | . . . 4 ⊢ ((⊤ ∧ 𝑘 ∈ ∅) → 𝐴 ∈ ℂ) |
| 16 | 1, 3, 5, 13, 15 | zsum 15795 | . . 3 ⊢ (⊤ → Σ𝑘 ∈ ∅ 𝐴 = ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0})))) |
| 17 | 16 | mptru 1577 | . 2 ⊢ Σ𝑘 ∈ ∅ 𝐴 = ( ⇝ ‘seq1( + , ((ℤ≥‘1) × {0}))) |
| 18 | fclim 15630 | . . . 4 ⊢ ⇝ :dom ⇝ ⟶ℂ | |
| 19 | ffun 6715 | . . . 4 ⊢ ( ⇝ :dom ⇝ ⟶ℂ → Fun ⇝ ) | |
| 20 | 18, 19 | ax-mp 5 | . . 3 ⊢ Fun ⇝ |
| 21 | serclim0 15654 | . . . 4 ⊢ (1 ∈ ℤ → seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0) | |
| 22 | 2, 21 | ax-mp 5 | . . 3 ⊢ seq1( + , ((ℤ≥‘1) × {0})) ⇝ 0 |
| 23 | funbrfv 6936 | . . 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 2789 | 1 ⊢ Σ𝑘 ∈ ∅ 𝐴 = 0 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 = wceq 1570 ⊤wtru 1571 ∈ wcel 2146 ⊆ wss 3908 ∅c0 4289 ifcif 4492 {csn 4594 class class class wbr 5114 × cxp 5664 dom cdm 5666 Fun wfun 6537 ⟶wf 6539 ‘cfv 6543 ℂcc 11116 0cc0 11118 1c1 11119 + caddc 11121 ℕcn 12251 ℤcz 12609 ℤ≥cuz 12880 seqcseq 14057 ⇝ cli 15561 Σcsu 15763 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 ax-inf2 9620 ax-cnex 11174 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-addrcl 11179 ax-mulcl 11180 ax-mulrcl 11181 ax-mulcom 11182 ax-addass 11183 ax-mulass 11184 ax-distr 11185 ax-i2m1 11186 ax-1ne0 11187 ax-1rid 11188 ax-rnegex 11189 ax-rrecex 11190 ax-cnre 11191 ax-pre-lttri 11192 ax-pre-lttrn 11193 ax-pre-ltadd 11194 ax-pre-mulgt0 11195 ax-pre-sup 11196 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-nel 3068 df-ral 3083 df-rex 3093 df-rmo 3372 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3928 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-int 4918 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5561 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-se 5620 df-we 5621 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-pred 6309 df-ord 6370 df-on 6371 df-lim 6372 df-suc 6373 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7380 df-ov 7426 df-oprab 7427 df-mpo 7428 df-om 7872 df-1st 7995 df-2nd 7996 df-frecs 8287 df-wrecs 8318 df-recs 8367 df-rdg 8406 df-1o 8462 df-er 8703 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-sup 9412 df-oi 9482 df-card 9944 df-pnf 11263 df-mnf 11264 df-xr 11265 df-ltxr 11266 df-le 11267 df-sub 11461 df-neg 11462 df-div 11890 df-nn 12252 df-2 12321 df-3 12322 df-n0 12523 df-z 12610 df-uz 12881 df-rp 13035 df-fz 13554 df-fzo 13702 df-seq 14058 df-exp 14118 df-hash 14387 df-cj 15176 df-re 15177 df-im 15178 df-sqrt 15312 df-abs 15313 df-clim 15565 df-sum 15764 |
| This theorem is used by: sumz 15799 fsumf1o 15800 fsumcllem 15809 fsumadd 15817 fsum2d 15848 fsumrev2 15859 fsummulc2 15861 fsumconst 15867 modfsummod 15872 fsumabs 15879 telfsumo 15880 fsumparts 15884 fsumrelem 15885 fsumrlim 15889 fsumo1 15890 fsumiun 15899 isumsplit 15920 arisum 15940 arisum2 15941 pwdif 15948 bpoly0 16129 sumeven 16470 sumodd 16471 bitsinv1 16525 bitsinvp1 16532 prmreclem4 17004 prmreclem5 17005 gsumfsum 21621 fsumcn 25066 ovolfiniun 25697 volfiniun 25743 itg10 25884 itgfsum 26023 dvmptfsum 26171 abelthlem6 26636 logfac 26803 log2ublem3 27150 harmonicbnd3 27209 cht1 27366 dchrisumlem1 27690 dchrisumlem3 27692 logdivbnd 27757 pntrsumbnd2 27768 pntrlog2bndlem4 27781 finsumvtxdg2size 29937 deg1prod 33904 esumpcvgval 34499 signsvf0 34999 signsvf1 35000 repr0 35030 breprexplemc 35051 tgoldbachgtda 35080 mettrifi 38449 rrncmslem 38524 deg1gprod 42948 sumcubes 43115 mccl 46355 dvmptfprod 46700 dvnprodlem3 46703 sge0rnn0 47123 sge00 47131 sge0sn 47134 ppi1sum 48424 |
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