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| Mirrors > Home > MPE Home > Th. List > Mathboxes > meaiunlelem | Structured version Visualization version GIF version | ||
| Description: The measure of the union of countable sets is less than or equal to the sum of the measures, Property 112C (d) of [Fremlin1] p. 16. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
| Ref | Expression |
|---|---|
| meaiunlelem.1 | ⊢ Ⅎ𝑛𝜑 |
| meaiunlelem.m | ⊢ (𝜑 → 𝑀 ∈ Meas) |
| meaiunlelem.s | ⊢ 𝑆 = dom 𝑀 |
| meaiunlelem.z | ⊢ 𝑍 = (ℤ≥‘𝑁) |
| meaiunlelem.e | ⊢ (𝜑 → 𝐸:𝑍⟶𝑆) |
| meaiunlelem.f | ⊢ 𝐹 = (𝑛 ∈ 𝑍 ↦ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖))) |
| Ref | Expression |
|---|---|
| meaiunlelem | ⊢ (𝜑 → (𝑀‘∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛)) ≤ (Σ^‘(𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑛))))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | meaiunlelem.1 | . . . . . . 7 ⊢ Ⅎ𝑛𝜑 | |
| 2 | meaiunlelem.z | . . . . . . 7 ⊢ 𝑍 = (ℤ≥‘𝑁) | |
| 3 | meaiunlelem.e | . . . . . . 7 ⊢ (𝜑 → 𝐸:𝑍⟶𝑆) | |
| 4 | meaiunlelem.f | . . . . . . 7 ⊢ 𝐹 = (𝑛 ∈ 𝑍 ↦ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖))) | |
| 5 | 1, 2, 3, 4 | iundjiun 47470 | . . . . . 6 ⊢ (𝜑 → ((∀𝑥 ∈ 𝑍 ∪ 𝑛 ∈ (𝑁...𝑥)(𝐹‘𝑛) = ∪ 𝑛 ∈ (𝑁...𝑥)(𝐸‘𝑛) ∧ ∪ 𝑛 ∈ 𝑍 (𝐹‘𝑛) = ∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛)) ∧ Disj 𝑛 ∈ 𝑍 (𝐹‘𝑛))) |
| 6 | 5 | simplrd 782 | . . . . 5 ⊢ (𝜑 → ∪ 𝑛 ∈ 𝑍 (𝐹‘𝑛) = ∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛)) |
| 7 | 6 | eqcomd 2766 | . . . 4 ⊢ (𝜑 → ∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛) = ∪ 𝑛 ∈ 𝑍 (𝐹‘𝑛)) |
| 8 | 7 | fveq2d 6889 | . . 3 ⊢ (𝜑 → (𝑀‘∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛)) = (𝑀‘∪ 𝑛 ∈ 𝑍 (𝐹‘𝑛))) |
| 9 | meaiunlelem.m | . . . 4 ⊢ (𝜑 → 𝑀 ∈ Meas) | |
| 10 | meaiunlelem.s | . . . 4 ⊢ 𝑆 = dom 𝑀 | |
| 11 | 9, 10 | dmmeasal 47462 | . . . . . . . 8 ⊢ (𝜑 → 𝑆 ∈ SAlg) |
| 12 | 11 | adantr 486 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → 𝑆 ∈ SAlg) |
| 13 | 3 | ffvelcdmda 7084 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐸‘𝑛) ∈ 𝑆) |
| 14 | fzofi 14117 | . . . . . . . . . . 11 ⊢ (𝑁..^𝑛) ∈ Fin | |
| 15 | isfinite 9653 | . . . . . . . . . . . . 13 ⊢ ((𝑁..^𝑛) ∈ Fin ↔ (𝑁..^𝑛) ≺ ω) | |
| 16 | 15 | biimpi 219 | . . . . . . . . . . . 12 ⊢ ((𝑁..^𝑛) ∈ Fin → (𝑁..^𝑛) ≺ ω) |
| 17 | sdomdom 9007 | . . . . . . . . . . . 12 ⊢ ((𝑁..^𝑛) ≺ ω → (𝑁..^𝑛) ≼ ω) | |
| 18 | 16, 17 | syl 18 | . . . . . . . . . . 11 ⊢ ((𝑁..^𝑛) ∈ Fin → (𝑁..^𝑛) ≼ ω) |
| 19 | 14, 18 | ax-mp 5 | . . . . . . . . . 10 ⊢ (𝑁..^𝑛) ≼ ω |
| 20 | 19 | a1i 11 | . . . . . . . . 9 ⊢ (𝜑 → (𝑁..^𝑛) ≼ ω) |
| 21 | 3 | adantr 486 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝐸:𝑍⟶𝑆) |
| 22 | elfzouz 13798 | . . . . . . . . . . . 12 ⊢ (𝑖 ∈ (𝑁..^𝑛) → 𝑖 ∈ (ℤ≥‘𝑁)) | |
| 23 | 2 | eqcomi 2769 | . . . . . . . . . . . 12 ⊢ (ℤ≥‘𝑁) = 𝑍 |
| 24 | 22, 23 | eleqtrdi 2870 | . . . . . . . . . . 11 ⊢ (𝑖 ∈ (𝑁..^𝑛) → 𝑖 ∈ 𝑍) |
| 25 | 24 | adantl 487 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ (𝑁..^𝑛)) → 𝑖 ∈ 𝑍) |
| 26 | 21, 25 | ffvelcdmd 7085 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑖 ∈ (𝑁..^𝑛)) → (𝐸‘𝑖) ∈ 𝑆) |
| 27 | 11, 20, 26 | saliuncl 47333 | . . . . . . . 8 ⊢ (𝜑 → ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖) ∈ 𝑆) |
| 28 | 27 | adantr 486 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖) ∈ 𝑆) |
| 29 | saldifcl2 47338 | . . . . . . 7 ⊢ ((𝑆 ∈ SAlg ∧ (𝐸‘𝑛) ∈ 𝑆 ∧ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖) ∈ 𝑆) → ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) ∈ 𝑆) | |
| 30 | 12, 13, 28, 29 | syl3anc 1398 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) ∈ 𝑆) |
| 31 | 1, 30, 4 | fmptdf 7117 | . . . . 5 ⊢ (𝜑 → 𝐹:𝑍⟶𝑆) |
| 32 | 31 | ffvelcdmda 7084 | . . . 4 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐹‘𝑛) ∈ 𝑆) |
| 33 | eqid 2760 | . . . . . . 7 ⊢ (ℤ≥‘𝑁) = (ℤ≥‘𝑁) | |
| 34 | 33 | uzct 46080 | . . . . . 6 ⊢ (ℤ≥‘𝑁) ≼ ω |
| 35 | 2, 34 | eqbrtri 5125 | . . . . 5 ⊢ 𝑍 ≼ ω |
| 36 | 35 | a1i 11 | . . . 4 ⊢ (𝜑 → 𝑍 ≼ ω) |
| 37 | 5 | simprd 501 | . . . 4 ⊢ (𝜑 → Disj 𝑛 ∈ 𝑍 (𝐹‘𝑛)) |
| 38 | 1, 9, 10, 32, 36, 37 | meadjiun 47476 | . . 3 ⊢ (𝜑 → (𝑀‘∪ 𝑛 ∈ 𝑍 (𝐹‘𝑛)) = (Σ^‘(𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐹‘𝑛))))) |
| 39 | eqidd 2761 | . . 3 ⊢ (𝜑 → (Σ^‘(𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐹‘𝑛)))) = (Σ^‘(𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐹‘𝑛))))) | |
| 40 | 8, 38, 39 | 3eqtrd 2799 | . 2 ⊢ (𝜑 → (𝑀‘∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛)) = (Σ^‘(𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐹‘𝑛))))) |
| 41 | 2 | fvexi 6899 | . . . 4 ⊢ 𝑍 ∈ V |
| 42 | 41 | a1i 11 | . . 3 ⊢ (𝜑 → 𝑍 ∈ V) |
| 43 | 9 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → 𝑀 ∈ Meas) |
| 44 | 43, 10, 32 | meacl 47468 | . . 3 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝑀‘(𝐹‘𝑛)) ∈ (0[,]+∞)) |
| 45 | 43, 10, 13 | meacl 47468 | . . 3 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝑀‘(𝐸‘𝑛)) ∈ (0[,]+∞)) |
| 46 | simpr 490 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → 𝑛 ∈ 𝑍) | |
| 47 | 13 | difexd 5292 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) ∈ V) |
| 48 | 4 | fvmpt2 7005 | . . . . . 6 ⊢ ((𝑛 ∈ 𝑍 ∧ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) ∈ V) → (𝐹‘𝑛) = ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖))) |
| 49 | 46, 47, 48 | syl2anc 596 | . . . . 5 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐹‘𝑛) = ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖))) |
| 50 | difssd 4073 | . . . . 5 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) ⊆ (𝐸‘𝑛)) | |
| 51 | 49, 50 | eqsstrd 3942 | . . . 4 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐹‘𝑛) ⊆ (𝐸‘𝑛)) |
| 52 | 43, 10, 32, 13, 51 | meassle 47473 | . . 3 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝑀‘(𝐹‘𝑛)) ≤ (𝑀‘(𝐸‘𝑛))) |
| 53 | 1, 42, 44, 45, 52 | sge0lempt 47420 | . 2 ⊢ (𝜑 → (Σ^‘(𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐹‘𝑛)))) ≤ (Σ^‘(𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑛))))) |
| 54 | 40, 53 | eqbrtrd 5126 | 1 ⊢ (𝜑 → (𝑀‘∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛)) ≤ (Σ^‘(𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑛))))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 Ⅎwnf 1815 ∈ wcel 2144 ∀wral 3076 Vcvv 3450 ∖ cdif 4045 ∪ ciun 4950 Disj wdisj 5069 class class class wbr 5102 ↦ cmpt 5185 dom cdm 5650 ⟶wf 6534 ‘cfv 6538 (class class class)co 7420 ωcom 7877 ≼ cdom 8971 ≺ csdm 8972 Fincfn 8973 ≤ cle 11344 ℤ≥cuz 12965 ...cfz 13639 ..^cfzo 13788 SAlgcsalg 47318 Σ^csumge0 47372 Meascmea 47459 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-inf2 9642 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 ax-pre-sup 11278 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-int 4907 df-iun 4952 df-disj 5070 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-se 5604 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-isom 6547 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-1o 8476 df-2o 8477 df-oadd 8480 df-omul 8481 df-er 8717 df-map 8849 df-en 8974 df-dom 8975 df-sdom 8976 df-fin 8977 df-sup 9434 df-oi 9504 df-card 10020 df-acn 10023 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-div 11974 df-nn 12336 df-2 12405 df-3 12406 df-n0 12607 df-z 12694 df-uz 12966 df-rp 13121 df-xadd 13242 df-ico 13482 df-icc 13483 df-fz 13640 df-fzo 13789 df-seq 14145 df-exp 14205 df-hash 14475 df-cj 15266 df-re 15267 df-im 15268 df-sqrt 15402 df-abs 15403 df-clim 15655 df-sum 15854 df-salg 47319 df-sumge0 47373 df-mea 47460 |
| This theorem is used by: meaiunle 47479 |
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