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| Mirrors > Home > MPE Home > Th. List > ordtrestixx | Structured version Visualization version GIF version | ||
| Description: The restriction of the less than order to an interval gives the same topology as the subspace topology. (Contributed by Mario Carneiro, 9-Sep-2015.) |
| Ref | Expression |
|---|---|
| ordtrestixx.1 | ⊢ 𝐴 ⊆ ℝ* |
| ordtrestixx.2 | ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴) → (𝑥[,]𝑦) ⊆ 𝐴) |
| Ref | Expression |
|---|---|
| ordtrestixx | ⊢ ((ordTop‘ ≤ ) ↾t 𝐴) = (ordTop‘( ≤ ∩ (𝐴 × 𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ledm 18814 | . . . 4 ⊢ ℝ* = dom ≤ | |
| 2 | letsr 18817 | . . . . 5 ⊢ ≤ ∈ TosetRel | |
| 3 | 2 | a1i 11 | . . . 4 ⊢ (⊤ → ≤ ∈ TosetRel ) |
| 4 | ordtrestixx.1 | . . . . 5 ⊢ 𝐴 ⊆ ℝ* | |
| 5 | 4 | a1i 11 | . . . 4 ⊢ (⊤ → 𝐴 ⊆ ℝ*) |
| 6 | 4 | sseli 3909 | . . . . . . 7 ⊢ (𝑥 ∈ 𝐴 → 𝑥 ∈ ℝ*) |
| 7 | 4 | sseli 3909 | . . . . . . 7 ⊢ (𝑦 ∈ 𝐴 → 𝑦 ∈ ℝ*) |
| 8 | iccval 13555 | . . . . . . 7 ⊢ ((𝑥 ∈ ℝ* ∧ 𝑦 ∈ ℝ*) → (𝑥[,]𝑦) = {𝑧 ∈ ℝ* ∣ (𝑥 ≤ 𝑧 ∧ 𝑧 ≤ 𝑦)}) | |
| 9 | 6, 7, 8 | syl2an 608 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴) → (𝑥[,]𝑦) = {𝑧 ∈ ℝ* ∣ (𝑥 ≤ 𝑧 ∧ 𝑧 ≤ 𝑦)}) |
| 10 | ordtrestixx.2 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴) → (𝑥[,]𝑦) ⊆ 𝐴) | |
| 11 | 9, 10 | eqsstrrd 3948 | . . . . 5 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴) → {𝑧 ∈ ℝ* ∣ (𝑥 ≤ 𝑧 ∧ 𝑧 ≤ 𝑦)} ⊆ 𝐴) |
| 12 | 11 | adantl 487 | . . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → {𝑧 ∈ ℝ* ∣ (𝑥 ≤ 𝑧 ∧ 𝑧 ≤ 𝑦)} ⊆ 𝐴) |
| 13 | 1, 3, 5, 12 | ordtrest2 23577 | . . 3 ⊢ (⊤ → (ordTop‘( ≤ ∩ (𝐴 × 𝐴))) = ((ordTop‘ ≤ ) ↾t 𝐴)) |
| 14 | 13 | eqcomd 2769 | . 2 ⊢ (⊤ → ((ordTop‘ ≤ ) ↾t 𝐴) = (ordTop‘( ≤ ∩ (𝐴 × 𝐴)))) |
| 15 | 14 | mptru 1577 | 1 ⊢ ((ordTop‘ ≤ ) ↾t 𝐴) = (ordTop‘( ≤ ∩ (𝐴 × 𝐴))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ⊤wtru 1571 ∈ wcel 2147 {crab 3416 ⊆ wss 3900 ∩ cin 4092 class class class wbr 5108 × cxp 5656 ‘cfv 6566 (class class class)co 7451 ℝ*cxr 11381 ≤ cle 11383 [,]cicc 13519 ↾t crest 17641 ordTopcordt 17721 TosetRel ctsr 18789 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5238 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-resscn 11296 ax-pre-lttri 11313 ax-pre-lttrn 11314 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-int 4913 df-iun 4958 df-iin 4959 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-ov 7454 df-oprab 7455 df-mpo 7456 df-om 7912 df-1st 8035 df-2nd 8036 df-1o 8514 df-2o 8515 df-er 8755 df-en 9012 df-dom 9013 df-sdom 9014 df-fin 9015 df-fi 9440 df-pnf 11384 df-mnf 11385 df-xr 11386 df-ltxr 11387 df-le 11388 df-icc 13523 df-rest 17643 df-topgen 17664 df-ordt 17723 df-ps 18790 df-tsr 18791 df-top 23267 df-topon 23284 df-bases 23319 |
| This theorem is used by: ordtresticc 23596 icopnfhmeo 25319 |
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