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| Mirrors > Home > MPE Home > Th. List > uniiccmbl | Structured version Visualization version GIF version | ||
| Description: An almost-disjoint union of closed intervals is measurable. (This proof does not use countable choice, unlike iunmbl 25879.) (Contributed by Mario Carneiro, 25-Mar-2015.) |
| Ref | Expression |
|---|---|
| uniioombl.1 | ⊢ (𝜑 → 𝐹:ℕ⟶( ≤ ∩ (ℝ × ℝ))) |
| uniioombl.2 | ⊢ (𝜑 → Disj 𝑥 ∈ ℕ ((,)‘(𝐹‘𝑥))) |
| uniioombl.3 | ⊢ 𝑆 = seq1( + , ((abs ∘ − ) ∘ 𝐹)) |
| Ref | Expression |
|---|---|
| uniiccmbl | ⊢ (𝜑 → ∪ ran ([,] ∘ 𝐹) ∈ dom vol) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | uniioombl.1 | . . . . 5 ⊢ (𝜑 → 𝐹:ℕ⟶( ≤ ∩ (ℝ × ℝ))) | |
| 2 | 1 | uniiccdif 25904 | . . . 4 ⊢ (𝜑 → (∪ ran ((,) ∘ 𝐹) ⊆ ∪ ran ([,] ∘ 𝐹) ∧ (vol*‘(∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹))) = 0)) |
| 3 | 2 | simpld 500 | . . 3 ⊢ (𝜑 → ∪ ran ((,) ∘ 𝐹) ⊆ ∪ ran ([,] ∘ 𝐹)) |
| 4 | undif 4437 | . . 3 ⊢ (∪ ran ((,) ∘ 𝐹) ⊆ ∪ ran ([,] ∘ 𝐹) ↔ (∪ ran ((,) ∘ 𝐹) ∪ (∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹))) = ∪ ran ([,] ∘ 𝐹)) | |
| 5 | 3, 4 | sylib 221 | . 2 ⊢ (𝜑 → (∪ ran ((,) ∘ 𝐹) ∪ (∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹))) = ∪ ran ([,] ∘ 𝐹)) |
| 6 | uniioombl.2 | . . . 4 ⊢ (𝜑 → Disj 𝑥 ∈ ℕ ((,)‘(𝐹‘𝑥))) | |
| 7 | uniioombl.3 | . . . 4 ⊢ 𝑆 = seq1( + , ((abs ∘ − ) ∘ 𝐹)) | |
| 8 | 1, 6, 7 | uniioombl 25915 | . . 3 ⊢ (𝜑 → ∪ ran ((,) ∘ 𝐹) ∈ dom vol) |
| 9 | ovolficcss 25795 | . . . . . 6 ⊢ (𝐹:ℕ⟶( ≤ ∩ (ℝ × ℝ)) → ∪ ran ([,] ∘ 𝐹) ⊆ ℝ) | |
| 10 | 1, 9 | syl 18 | . . . . 5 ⊢ (𝜑 → ∪ ran ([,] ∘ 𝐹) ⊆ ℝ) |
| 11 | 10 | ssdifssd 4083 | . . . 4 ⊢ (𝜑 → (∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹)) ⊆ ℝ) |
| 12 | 2 | simprd 501 | . . . 4 ⊢ (𝜑 → (vol*‘(∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹))) = 0) |
| 13 | nulmbl 25861 | . . . 4 ⊢ (((∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹)) ⊆ ℝ ∧ (vol*‘(∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹))) = 0) → (∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹)) ∈ dom vol) | |
| 14 | 11, 12, 13 | syl2anc 596 | . . 3 ⊢ (𝜑 → (∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹)) ∈ dom vol) |
| 15 | unmbl 25863 | . . 3 ⊢ ((∪ ran ((,) ∘ 𝐹) ∈ dom vol ∧ (∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹)) ∈ dom vol) → (∪ ran ((,) ∘ 𝐹) ∪ (∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹))) ∈ dom vol) | |
| 16 | 8, 14, 15 | syl2anc 596 | . 2 ⊢ (𝜑 → (∪ ran ((,) ∘ 𝐹) ∪ (∪ ran ([,] ∘ 𝐹) ∖ ∪ ran ((,) ∘ 𝐹))) ∈ dom vol) |
| 17 | 5, 16 | eqeltrrd 2861 | 1 ⊢ (𝜑 → ∪ ran ([,] ∘ 𝐹) ∈ dom vol) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 ⊆ wss 3895 ∖ cdif 4045 ∩ cin 4089 ∪ cun 4149 ∪ cuni 4866 Disj wdisj 5069 × cxp 5648 dom cdm 5650 ran crn 5651 ∘ ccom 5654 ⟶wf 6534 ‘cfv 6538 ℝcr 11202 0cc0 11203 1c1 11204 + caddc 11206 ≤ cle 11347 − cmin 11544 ℕcn 12338 (,)cioo 13479 [,]cicc 13482 seqcseq 14147 abscabs 15406 vol*covol 25788 volcvol 25789 |
| 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 9645 ax-cnex 11259 ax-resscn 11260 ax-1cn 11261 ax-icn 11262 ax-addcl 11263 ax-addrcl 11264 ax-mulcl 11265 ax-mulrcl 11266 ax-mulcom 11267 ax-addass 11268 ax-mulass 11269 ax-distr 11270 ax-i2m1 11271 ax-1ne0 11272 ax-1rid 11273 ax-rnegex 11274 ax-rrecex 11275 ax-cnre 11276 ax-pre-lttri 11277 ax-pre-lttrn 11278 ax-pre-ltadd 11279 ax-pre-mulgt0 11280 ax-pre-sup 11281 |
| 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 4585 df-pr 4587 df-op 4835 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-of 7693 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8302 df-wrecs 8333 df-recs 8382 df-rdg 8421 df-1o 8479 df-2o 8480 df-er 8720 df-map 8852 df-pm 8853 df-en 8977 df-dom 8978 df-sdom 8979 df-fin 8980 df-fi 9406 df-sup 9437 df-inf 9438 df-oi 9507 df-dju 9985 df-card 10023 df-acn 10026 df-pnf 11348 df-mnf 11349 df-xr 11350 df-ltxr 11351 df-le 11352 df-sub 11546 df-neg 11547 df-div 11977 df-nn 12339 df-2 12408 df-3 12409 df-4 12410 df-n0 12610 df-z 12697 df-uz 12969 df-q 13079 df-rp 13124 df-xneg 13244 df-xadd 13245 df-xmul 13246 df-ioo 13483 df-ico 13485 df-icc 13486 df-fz 13643 df-fzo 13792 df-fl 13935 df-seq 14148 df-exp 14208 df-hash 14478 df-cj 15271 df-re 15272 df-im 15273 df-sqrt 15407 df-abs 15408 df-clim 15660 df-rlim 15661 df-sum 15859 df-rest 17598 df-topgen 17619 df-psmet 21675 df-xmet 21676 df-met 21677 df-bl 21678 df-mopn 21679 df-top 23217 df-topon 23234 df-bases 23269 df-cmp 23710 df-ovol 25790 df-vol 25791 |
| This theorem is used by: dyadmbl 25926 |
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