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Mirrors > Home > ILE Home > Th. List > ixxex | GIF version |
Description: The set of intervals of extended reals exists. (Contributed by Mario Carneiro, 3-Nov-2013.) (Revised by Mario Carneiro, 17-Nov-2014.) |
Ref | Expression |
---|---|
ixx.1 | ⊢ 𝑂 = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥𝑅𝑧 ∧ 𝑧𝑆𝑦)}) |
Ref | Expression |
---|---|
ixxex | ⊢ 𝑂 ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xrex 9792 | . . . 4 ⊢ ℝ* ∈ V | |
2 | 1, 1 | xpex 4719 | . . 3 ⊢ (ℝ* × ℝ*) ∈ V |
3 | 1 | pwex 4162 | . . 3 ⊢ 𝒫 ℝ* ∈ V |
4 | 2, 3 | xpex 4719 | . 2 ⊢ ((ℝ* × ℝ*) × 𝒫 ℝ*) ∈ V |
5 | ixx.1 | . . . 4 ⊢ 𝑂 = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥𝑅𝑧 ∧ 𝑧𝑆𝑦)}) | |
6 | 5 | ixxf 9834 | . . 3 ⊢ 𝑂:(ℝ* × ℝ*)⟶𝒫 ℝ* |
7 | fssxp 5355 | . . 3 ⊢ (𝑂:(ℝ* × ℝ*)⟶𝒫 ℝ* → 𝑂 ⊆ ((ℝ* × ℝ*) × 𝒫 ℝ*)) | |
8 | 6, 7 | ax-mp 5 | . 2 ⊢ 𝑂 ⊆ ((ℝ* × ℝ*) × 𝒫 ℝ*) |
9 | 4, 8 | ssexi 4120 | 1 ⊢ 𝑂 ∈ V |
Colors of variables: wff set class |
Syntax hints: ∧ wa 103 = wceq 1343 ∈ wcel 2136 {crab 2448 Vcvv 2726 ⊆ wss 3116 𝒫 cpw 3559 class class class wbr 3982 × cxp 4602 ⟶wf 5184 ∈ cmpo 5844 ℝ*cxr 7932 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-cnex 7844 ax-resscn 7845 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ral 2449 df-rex 2450 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-id 4271 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-fv 5196 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-pnf 7935 df-mnf 7936 df-xr 7937 |
This theorem is referenced by: iooex 9843 |
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