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| Mirrors > Home > MPE Home > Th. List > ixxssxr | Structured version Visualization version GIF version | ||
| Description: The set of intervals of extended reals maps to subsets of extended reals. (Contributed by Mario Carneiro, 4-Jul-2014.) |
| Ref | Expression |
|---|---|
| ixx.1 | ⊢ 𝑂 = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥𝑅𝑧 ∧ 𝑧𝑆𝑦)}) |
| Ref | Expression |
|---|---|
| ixxssxr | ⊢ (𝐴𝑂𝐵) ⊆ ℝ* |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ov 7415 | . . 3 ⊢ (𝐴𝑂𝐵) = (𝑂‘〈𝐴, 𝐵〉) | |
| 2 | ixx.1 | . . . . 5 ⊢ 𝑂 = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥𝑅𝑧 ∧ 𝑧𝑆𝑦)}) | |
| 3 | 2 | ixxf 13388 | . . . 4 ⊢ 𝑂:(ℝ* × ℝ*)⟶𝒫 ℝ* |
| 4 | 0elpw 5325 | . . . 4 ⊢ ∅ ∈ 𝒫 ℝ* | |
| 5 | 3, 4 | f0cli 7093 | . . 3 ⊢ (𝑂‘〈𝐴, 𝐵〉) ∈ 𝒫 ℝ* |
| 6 | 1, 5 | eqeltri 2858 | . 2 ⊢ (𝐴𝑂𝐵) ∈ 𝒫 ℝ* |
| 7 | ovex 7445 | . . 3 ⊢ (𝐴𝑂𝐵) ∈ V | |
| 8 | 7 | elpw 4565 | . 2 ⊢ ((𝐴𝑂𝐵) ∈ 𝒫 ℝ* ↔ (𝐴𝑂𝐵) ⊆ ℝ*) |
| 9 | 6, 8 | mpbi 233 | 1 ⊢ (𝐴𝑂𝐵) ⊆ ℝ* |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 400 = wceq 1569 ∈ wcel 2142 {crab 3415 ⊆ wss 3904 𝒫 cpw 4561 〈cop 4594 class class class wbr 5108 × cxp 5658 ‘cfv 6536 (class class class)co 7412 ∈ cmpo 7414 ℝ*cxr 11248 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-nul 5268 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-resscn 11163 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-id 5555 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-fv 6544 df-ov 7415 df-oprab 7416 df-mpo 7417 df-1st 7984 df-2nd 7985 df-xr 11253 |
| This theorem is used by: iccssxr 13463 iocssxr 13464 icossxr 13465 ioossioobi 46261 |
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