| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > volmea | Structured version Visualization version GIF version | ||
| Description: The Lebesgue measure on the Reals is actually a measure. (Contributed by Glauco Siliprandi, 3-Mar-2021.) |
| Ref | Expression |
|---|---|
| volmea | ⊢ (𝜑 → vol ∈ Meas) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmvolsal 46921 | . . 3 ⊢ dom vol ∈ SAlg | |
| 2 | 1 | a1i 11 | . 2 ⊢ (𝜑 → dom vol ∈ SAlg) |
| 3 | volf 25592 | . . 3 ⊢ vol:dom vol⟶(0[,]+∞) | |
| 4 | 3 | a1i 11 | . 2 ⊢ (𝜑 → vol:dom vol⟶(0[,]+∞)) |
| 5 | vol0 46534 | . . 3 ⊢ (vol‘∅) = 0 | |
| 6 | 5 | a1i 11 | . 2 ⊢ (𝜑 → (vol‘∅) = 0) |
| 7 | simp1 1150 | . . 3 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) → 𝜑) | |
| 8 | simp2 1151 | . . 3 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) → 𝑒:ℕ⟶dom vol) | |
| 9 | fveq2 6868 | . . . . . 6 ⊢ (𝑚 = 𝑛 → (𝑒‘𝑚) = (𝑒‘𝑛)) | |
| 10 | 9 | cbvdisjv 5079 | . . . . 5 ⊢ (Disj 𝑚 ∈ ℕ (𝑒‘𝑚) ↔ Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) |
| 11 | 10 | biimpri 230 | . . . 4 ⊢ (Disj 𝑛 ∈ ℕ (𝑒‘𝑛) → Disj 𝑚 ∈ ℕ (𝑒‘𝑚)) |
| 12 | 11 | 3ad2ant3 1149 | . . 3 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) → Disj 𝑚 ∈ ℕ (𝑒‘𝑚)) |
| 13 | simp2 1151 | . . . 4 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑚 ∈ ℕ (𝑒‘𝑚)) → 𝑒:ℕ⟶dom vol) | |
| 14 | 10 | biimpi 218 | . . . . 5 ⊢ (Disj 𝑚 ∈ ℕ (𝑒‘𝑚) → Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) |
| 15 | 14 | 3ad2ant3 1149 | . . . 4 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑚 ∈ ℕ (𝑒‘𝑚)) → Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) |
| 16 | 13, 15 | voliunsge0 47048 | . . 3 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑚 ∈ ℕ (𝑒‘𝑚)) → (vol‘∪ 𝑛 ∈ ℕ (𝑒‘𝑛)) = (Σ^‘(𝑛 ∈ ℕ ↦ (vol‘(𝑒‘𝑛))))) |
| 17 | 7, 8, 12, 16 | syl3anc 1391 | . 2 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) → (vol‘∪ 𝑛 ∈ ℕ (𝑒‘𝑛)) = (Σ^‘(𝑛 ∈ ℕ ↦ (vol‘(𝑒‘𝑛))))) |
| 18 | 2, 4, 6, 17 | ismeannd 47042 | 1 ⊢ (𝜑 → vol ∈ Meas) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1099 = wceq 1561 ∈ wcel 2143 ∅c0 4286 ∪ ciun 4950 Disj wdisj 5068 ↦ cmpt 5182 dom cdm 5648 ⟶wf 6518 ‘cfv 6522 (class class class)co 7397 0cc0 11074 +∞cpnf 11214 ℕcn 12211 [,]cicc 13353 volcvol 25526 SAlgcsalg 46883 Σ^csumge0 46937 Meascmea 47024 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5228 ax-sep 5247 ax-nul 5257 ax-pow 5323 ax-pr 5391 ax-un 7719 ax-inf2 9597 ax-cc 10393 ax-cnex 11130 ax-resscn 11131 ax-1cn 11132 ax-icn 11133 ax-addcl 11134 ax-addrcl 11135 ax-mulcl 11136 ax-mulrcl 11137 ax-mulcom 11138 ax-addass 11139 ax-mulass 11140 ax-distr 11141 ax-i2m1 11142 ax-1ne0 11143 ax-1rid 11144 ax-rnegex 11145 ax-rrecex 11146 ax-cnre 11147 ax-pre-lttri 11148 ax-pre-lttrn 11149 ax-pre-ltadd 11150 ax-pre-mulgt0 11151 ax-pre-sup 11152 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 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 5069 df-br 5102 df-opab 5164 df-mpt 5183 df-tr 5209 df-id 5543 df-eprel 5548 df-po 5556 df-so 5557 df-fr 5601 df-se 5602 df-we 5603 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-pred 6289 df-ord 6350 df-on 6351 df-lim 6352 df-suc 6353 df-iota 6478 df-fun 6524 df-fn 6525 df-f 6526 df-f1 6527 df-fo 6528 df-f1o 6529 df-fv 6530 df-isom 6531 df-riota 7354 df-ov 7400 df-oprab 7401 df-mpo 7402 df-of 7661 df-om 7848 df-1st 7971 df-2nd 7972 df-frecs 8263 df-wrecs 8294 df-recs 8343 df-rdg 8382 df-1o 8438 df-2o 8439 df-er 8679 df-map 8811 df-pm 8812 df-en 8929 df-dom 8930 df-sdom 8931 df-fin 8932 df-sup 9389 df-inf 9390 df-oi 9459 df-dju 9860 df-card 9898 df-pnf 11219 df-mnf 11220 df-xr 11221 df-ltxr 11222 df-le 11223 df-sub 11417 df-neg 11418 df-div 11846 df-nn 12212 df-2 12281 df-3 12282 df-n0 12483 df-z 12570 df-uz 12841 df-q 12951 df-rp 12995 df-xadd 13116 df-ioo 13354 df-ico 13356 df-icc 13357 df-fz 13514 df-fzo 13661 df-fl 13803 df-seq 14016 df-exp 14076 df-hash 14345 df-cj 15127 df-re 15128 df-im 15129 df-sqrt 15263 df-abs 15264 df-clim 15516 df-rlim 15517 df-sum 15715 df-xmet 21418 df-met 21419 df-ovol 25527 df-vol 25528 df-salg 46884 df-sumge0 46938 df-mea 47025 |
| This theorem is referenced by: (None) |
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