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| Mirrors > Home > MPE Home > Th. List > ixxex | Structured version Visualization version 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 12990 | . . . 4 ⊢ ℝ* ∈ V | |
| 2 | 1, 1 | xpex 7738 | . . 3 ⊢ (ℝ* × ℝ*) ∈ V |
| 3 | 1 | pwex 5339 | . . 3 ⊢ 𝒫 ℝ* ∈ V |
| 4 | 2, 3 | xpex 7738 | . 2 ⊢ ((ℝ* × ℝ*) × 𝒫 ℝ*) ∈ V |
| 5 | ixx.1 | . . . 4 ⊢ 𝑂 = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥𝑅𝑧 ∧ 𝑧𝑆𝑦)}) | |
| 6 | 5 | ixxf 13361 | . . 3 ⊢ 𝑂:(ℝ* × ℝ*)⟶𝒫 ℝ* |
| 7 | fssxp 6721 | . . 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 5280 | 1 ⊢ 𝑂 ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 399 = wceq 1562 ∈ wcel 2144 {crab 3416 Vcvv 3456 ⊆ wss 3906 𝒫 cpw 4557 class class class wbr 5102 × cxp 5647 ⟶wf 6519 ∈ cmpo 7400 ℝ*cxr 11217 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-sep 5248 ax-nul 5258 ax-pow 5324 ax-pr 5392 ax-un 7720 ax-cnex 11131 ax-resscn 11132 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-mo 2568 df-eu 2598 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3079 df-rex 3089 df-rab 3417 df-v 3458 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-id 5544 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-rn 5660 df-res 5661 df-ima 5662 df-iota 6479 df-fun 6525 df-fn 6526 df-f 6527 df-fv 6531 df-oprab 7402 df-mpo 7403 df-1st 7972 df-2nd 7973 df-xr 11222 |
| This theorem is referenced by: iooex 13374 isbasisrelowl 37857 relowlpssretop 37863 |
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