Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > omecl | Structured version Visualization version GIF version |
Description: The outer measure of a set is a nonnegative extended real. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
Ref | Expression |
---|---|
omecl.o | ⊢ (𝜑 → 𝑂 ∈ OutMeas) |
omecl.x | ⊢ 𝑋 = ∪ dom 𝑂 |
omecl.ss | ⊢ (𝜑 → 𝐴 ⊆ 𝑋) |
Ref | Expression |
---|---|
omecl | ⊢ (𝜑 → (𝑂‘𝐴) ∈ (0[,]+∞)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | omecl.o | . . 3 ⊢ (𝜑 → 𝑂 ∈ OutMeas) | |
2 | omecl.x | . . 3 ⊢ 𝑋 = ∪ dom 𝑂 | |
3 | 1, 2 | omef 39386 | . 2 ⊢ (𝜑 → 𝑂:𝒫 𝑋⟶(0[,]+∞)) |
4 | omecl.ss | . . 3 ⊢ (𝜑 → 𝐴 ⊆ 𝑋) | |
5 | 2 | a1i 11 | . . . . . 6 ⊢ (𝜑 → 𝑋 = ∪ dom 𝑂) |
6 | dmexg 6989 | . . . . . . . 8 ⊢ (𝑂 ∈ OutMeas → dom 𝑂 ∈ V) | |
7 | 1, 6 | syl 17 | . . . . . . 7 ⊢ (𝜑 → dom 𝑂 ∈ V) |
8 | uniexg 6853 | . . . . . . 7 ⊢ (dom 𝑂 ∈ V → ∪ dom 𝑂 ∈ V) | |
9 | 7, 8 | syl 17 | . . . . . 6 ⊢ (𝜑 → ∪ dom 𝑂 ∈ V) |
10 | 5, 9 | eqeltrd 2688 | . . . . 5 ⊢ (𝜑 → 𝑋 ∈ V) |
11 | 10, 4 | ssexd 4733 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ V) |
12 | elpwg 4116 | . . . 4 ⊢ (𝐴 ∈ V → (𝐴 ∈ 𝒫 𝑋 ↔ 𝐴 ⊆ 𝑋)) | |
13 | 11, 12 | syl 17 | . . 3 ⊢ (𝜑 → (𝐴 ∈ 𝒫 𝑋 ↔ 𝐴 ⊆ 𝑋)) |
14 | 4, 13 | mpbird 246 | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝒫 𝑋) |
15 | 3, 14 | ffvelrnd 6268 | 1 ⊢ (𝜑 → (𝑂‘𝐴) ∈ (0[,]+∞)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 195 = wceq 1475 ∈ wcel 1977 Vcvv 3173 ⊆ wss 3540 𝒫 cpw 4108 ∪ cuni 4372 dom cdm 5038 ‘cfv 5804 (class class class)co 6549 0cc0 9815 +∞cpnf 9950 [,]cicc 12049 OutMeascome 39379 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pr 4833 ax-un 6847 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-fv 5812 df-ome 39380 |
This theorem is referenced by: caragen0 39396 omexrcl 39397 caragenunidm 39398 omessre 39400 caragenuncllem 39402 caragendifcl 39404 omeunle 39406 omeiunle 39407 omeiunltfirp 39409 carageniuncllem2 39412 carageniuncl 39413 caratheodorylem1 39416 caratheodorylem2 39417 omege0 39423 |
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