Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > sge0pnffsumgt | Structured version Visualization version GIF version |
Description: If the sum of nonnegative extended reals is +∞, then any real number can be dominated by finite subsums. (Contributed by Glauco Siliprandi, 21-Nov-2020.) |
Ref | Expression |
---|---|
sge0pnffsumgt.k | ⊢ Ⅎ𝑘𝜑 |
sge0pnffsumgt.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
sge0pnffsumgt.b | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ (0[,)+∞)) |
sge0pnffsumgt.p | ⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝐴 ↦ 𝐵)) = +∞) |
sge0pnffsumgt.y | ⊢ (𝜑 → 𝑌 ∈ ℝ) |
Ref | Expression |
---|---|
sge0pnffsumgt | ⊢ (𝜑 → ∃𝑥 ∈ (𝒫 𝐴 ∩ Fin)𝑌 < Σ𝑘 ∈ 𝑥 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sge0pnffsumgt.k | . . 3 ⊢ Ⅎ𝑘𝜑 | |
2 | sge0pnffsumgt.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
3 | icossicc 13097 | . . . 4 ⊢ (0[,)+∞) ⊆ (0[,]+∞) | |
4 | sge0pnffsumgt.b | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ (0[,)+∞)) | |
5 | 3, 4 | sselid 3915 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ (0[,]+∞)) |
6 | sge0pnffsumgt.p | . . 3 ⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝐴 ↦ 𝐵)) = +∞) | |
7 | sge0pnffsumgt.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ ℝ) | |
8 | 1, 2, 5, 6, 7 | sge0pnffigtmpt 43868 | . 2 ⊢ (𝜑 → ∃𝑥 ∈ (𝒫 𝐴 ∩ Fin)𝑌 < (Σ^‘(𝑘 ∈ 𝑥 ↦ 𝐵))) |
9 | simpr 484 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝐴 ∩ Fin)) ∧ 𝑌 < (Σ^‘(𝑘 ∈ 𝑥 ↦ 𝐵))) → 𝑌 < (Σ^‘(𝑘 ∈ 𝑥 ↦ 𝐵))) | |
10 | nfv 1918 | . . . . . . . 8 ⊢ Ⅎ𝑘 𝑥 ∈ (𝒫 𝐴 ∩ Fin) | |
11 | 1, 10 | nfan 1903 | . . . . . . 7 ⊢ Ⅎ𝑘(𝜑 ∧ 𝑥 ∈ (𝒫 𝐴 ∩ Fin)) |
12 | elinel2 4126 | . . . . . . . 8 ⊢ (𝑥 ∈ (𝒫 𝐴 ∩ Fin) → 𝑥 ∈ Fin) | |
13 | 12 | adantl 481 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝐴 ∩ Fin)) → 𝑥 ∈ Fin) |
14 | simpll 763 | . . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝐴 ∩ Fin)) ∧ 𝑘 ∈ 𝑥) → 𝜑) | |
15 | elpwinss 42486 | . . . . . . . . . 10 ⊢ (𝑥 ∈ (𝒫 𝐴 ∩ Fin) → 𝑥 ⊆ 𝐴) | |
16 | 15 | sselda 3917 | . . . . . . . . 9 ⊢ ((𝑥 ∈ (𝒫 𝐴 ∩ Fin) ∧ 𝑘 ∈ 𝑥) → 𝑘 ∈ 𝐴) |
17 | 16 | adantll 710 | . . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝐴 ∩ Fin)) ∧ 𝑘 ∈ 𝑥) → 𝑘 ∈ 𝐴) |
18 | 14, 17, 4 | syl2anc 583 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝐴 ∩ Fin)) ∧ 𝑘 ∈ 𝑥) → 𝐵 ∈ (0[,)+∞)) |
19 | 11, 13, 18 | sge0fsummptf 43864 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝐴 ∩ Fin)) → (Σ^‘(𝑘 ∈ 𝑥 ↦ 𝐵)) = Σ𝑘 ∈ 𝑥 𝐵) |
20 | 19 | adantr 480 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝐴 ∩ Fin)) ∧ 𝑌 < (Σ^‘(𝑘 ∈ 𝑥 ↦ 𝐵))) → (Σ^‘(𝑘 ∈ 𝑥 ↦ 𝐵)) = Σ𝑘 ∈ 𝑥 𝐵) |
21 | 9, 20 | breqtrd 5096 | . . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝐴 ∩ Fin)) ∧ 𝑌 < (Σ^‘(𝑘 ∈ 𝑥 ↦ 𝐵))) → 𝑌 < Σ𝑘 ∈ 𝑥 𝐵) |
22 | 21 | ex 412 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝐴 ∩ Fin)) → (𝑌 < (Σ^‘(𝑘 ∈ 𝑥 ↦ 𝐵)) → 𝑌 < Σ𝑘 ∈ 𝑥 𝐵)) |
23 | 22 | reximdva 3202 | . 2 ⊢ (𝜑 → (∃𝑥 ∈ (𝒫 𝐴 ∩ Fin)𝑌 < (Σ^‘(𝑘 ∈ 𝑥 ↦ 𝐵)) → ∃𝑥 ∈ (𝒫 𝐴 ∩ Fin)𝑌 < Σ𝑘 ∈ 𝑥 𝐵)) |
24 | 8, 23 | mpd 15 | 1 ⊢ (𝜑 → ∃𝑥 ∈ (𝒫 𝐴 ∩ Fin)𝑌 < Σ𝑘 ∈ 𝑥 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 Ⅎwnf 1787 ∈ wcel 2108 ∃wrex 3064 ∩ cin 3882 𝒫 cpw 4530 class class class wbr 5070 ↦ cmpt 5153 ‘cfv 6418 (class class class)co 7255 Fincfn 8691 ℝcr 10801 0cc0 10802 +∞cpnf 10937 < clt 10940 [,)cico 13010 [,]cicc 13011 Σcsu 15325 Σ^csumge0 43790 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-sup 9131 df-oi 9199 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-n0 12164 df-z 12250 df-uz 12512 df-rp 12660 df-ico 13014 df-icc 13015 df-fz 13169 df-fzo 13312 df-seq 13650 df-exp 13711 df-hash 13973 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-clim 15125 df-sum 15326 df-sumge0 43791 |
This theorem is referenced by: sge0gtfsumgt 43871 |
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