| 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 46532 | . . 3 ⊢ dom vol ∈ SAlg | |
| 2 | 1 | a1i 11 | . 2 ⊢ (𝜑 → dom vol ∈ SAlg) |
| 3 | volf 25484 | . . 3 ⊢ vol:dom vol⟶(0[,]+∞) | |
| 4 | 3 | a1i 11 | . 2 ⊢ (𝜑 → vol:dom vol⟶(0[,]+∞)) |
| 5 | vol0 46145 | . . 3 ⊢ (vol‘∅) = 0 | |
| 6 | 5 | a1i 11 | . 2 ⊢ (𝜑 → (vol‘∅) = 0) |
| 7 | simp1 1136 | . . 3 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) → 𝜑) | |
| 8 | simp2 1137 | . . 3 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) → 𝑒:ℕ⟶dom vol) | |
| 9 | fveq2 6832 | . . . . . 6 ⊢ (𝑚 = 𝑛 → (𝑒‘𝑚) = (𝑒‘𝑛)) | |
| 10 | 9 | cbvdisjv 5074 | . . . . 5 ⊢ (Disj 𝑚 ∈ ℕ (𝑒‘𝑚) ↔ Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) |
| 11 | 10 | biimpri 228 | . . . 4 ⊢ (Disj 𝑛 ∈ ℕ (𝑒‘𝑛) → Disj 𝑚 ∈ ℕ (𝑒‘𝑚)) |
| 12 | 11 | 3ad2ant3 1135 | . . 3 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) → Disj 𝑚 ∈ ℕ (𝑒‘𝑚)) |
| 13 | simp2 1137 | . . . 4 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑚 ∈ ℕ (𝑒‘𝑚)) → 𝑒:ℕ⟶dom vol) | |
| 14 | 10 | biimpi 216 | . . . . 5 ⊢ (Disj 𝑚 ∈ ℕ (𝑒‘𝑚) → Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) |
| 15 | 14 | 3ad2ant3 1135 | . . . 4 ⊢ ((𝜑 ∧ 𝑒:ℕ⟶dom vol ∧ Disj 𝑚 ∈ ℕ (𝑒‘𝑚)) → Disj 𝑛 ∈ ℕ (𝑒‘𝑛)) |
| 16 | 13, 15 | voliunsge0 46659 | . . 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 1373 | . 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 46653 | 1 ⊢ (𝜑 → vol ∈ Meas) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1086 = wceq 1541 ∈ wcel 2113 ∅c0 4283 ∪ ciun 4944 Disj wdisj 5063 ↦ cmpt 5177 dom cdm 5622 ⟶wf 6486 ‘cfv 6490 (class class class)co 7356 0cc0 11024 +∞cpnf 11161 ℕcn 12143 [,]cicc 13262 volcvol 25418 SAlgcsalg 46494 Σ^csumge0 46548 Meascmea 46635 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-inf2 9548 ax-cc 10343 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 ax-pre-sup 11102 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-int 4901 df-iun 4946 df-disj 5064 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-se 5576 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-isom 6499 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-of 7620 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-2o 8396 df-er 8633 df-map 8763 df-pm 8764 df-en 8882 df-dom 8883 df-sdom 8884 df-fin 8885 df-sup 9343 df-inf 9344 df-oi 9413 df-dju 9811 df-card 9849 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-div 11793 df-nn 12144 df-2 12206 df-3 12207 df-n0 12400 df-z 12487 df-uz 12750 df-q 12860 df-rp 12904 df-xadd 13025 df-ioo 13263 df-ico 13265 df-icc 13266 df-fz 13422 df-fzo 13569 df-fl 13710 df-seq 13923 df-exp 13983 df-hash 14252 df-cj 15020 df-re 15021 df-im 15022 df-sqrt 15156 df-abs 15157 df-clim 15409 df-rlim 15410 df-sum 15608 df-xmet 21300 df-met 21301 df-ovol 25419 df-vol 25420 df-salg 46495 df-sumge0 46549 df-mea 46636 |
| This theorem is referenced by: (None) |
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