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| Mirrors > Home > MPE Home > Th. List > Mathboxes > icccldii | Structured version Visualization version GIF version | ||
| Description: Closed intervals are closed sets of II. Note that iccss 13440, iccordt 23339, and ordtresticc 23348 are proved from ixxss12 13391, ordtcld3 23324, and ordtrest2 23329, respectively. An alternate proof uses restcldi 23298, dfii2 25009, and icccld 24891. (Contributed by Zhi Wang, 8-Sep-2024.) |
| Ref | Expression |
|---|---|
| icccldii | ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘II)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iccssxr 13456 | . . 3 ⊢ (0[,]1) ⊆ ℝ* | |
| 2 | iccordt 23339 | . . 3 ⊢ (𝐴[,]𝐵) ∈ (Clsd‘(ordTop‘ ≤ )) | |
| 3 | 0re 11209 | . . . 4 ⊢ 0 ∈ ℝ | |
| 4 | 1re 11207 | . . . 4 ⊢ 1 ∈ ℝ | |
| 5 | iccss 13440 | . . . 4 ⊢ (((0 ∈ ℝ ∧ 1 ∈ ℝ) ∧ (0 ≤ 𝐴 ∧ 𝐵 ≤ 1)) → (𝐴[,]𝐵) ⊆ (0[,]1)) | |
| 6 | 3, 4, 5 | mpanl12 714 | . . 3 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ⊆ (0[,]1)) |
| 7 | letopuni 23332 | . . . 4 ⊢ ℝ* = ∪ (ordTop‘ ≤ ) | |
| 8 | 7 | restcldi 23298 | . . 3 ⊢ (((0[,]1) ⊆ ℝ* ∧ (𝐴[,]𝐵) ∈ (Clsd‘(ordTop‘ ≤ )) ∧ (𝐴[,]𝐵) ⊆ (0[,]1)) → (𝐴[,]𝐵) ∈ (Clsd‘((ordTop‘ ≤ ) ↾t (0[,]1)))) |
| 9 | 1, 2, 6, 8 | mp3an12i 1491 | . 2 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘((ordTop‘ ≤ ) ↾t (0[,]1)))) |
| 10 | dfii5 25012 | . . . 4 ⊢ II = (ordTop‘( ≤ ∩ ((0[,]1) × (0[,]1)))) | |
| 11 | ordtresticc 23348 | . . . 4 ⊢ ((ordTop‘ ≤ ) ↾t (0[,]1)) = (ordTop‘( ≤ ∩ ((0[,]1) × (0[,]1)))) | |
| 12 | 10, 11 | eqtr4i 2795 | . . 3 ⊢ II = ((ordTop‘ ≤ ) ↾t (0[,]1)) |
| 13 | 12 | fveq2i 6885 | . 2 ⊢ (Clsd‘II) = (Clsd‘((ordTop‘ ≤ ) ↾t (0[,]1))) |
| 14 | 9, 13 | eleqtrrdi 2880 | 1 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘II)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∈ wcel 2149 ∩ cin 3912 ⊆ wss 3913 class class class wbr 5113 × cxp 5660 ‘cfv 6537 (class class class)co 7411 ℝcr 11098 0cc0 11099 1c1 11100 ℝ*cxr 11241 ≤ cle 11243 [,]cicc 13374 ↾t crest 17472 ordTopcordt 17552 Clsdccld 23141 IIcii 25002 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11155 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 ax-pre-mulgt0 11176 ax-pre-sup 11177 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-int 4917 df-iun 4962 df-iin 4963 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7862 df-1st 7985 df-2nd 7986 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8452 df-2o 8453 df-er 8693 df-map 8825 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 df-fi 9370 df-sup 9401 df-inf 9402 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-le 11248 df-sub 11442 df-neg 11443 df-div 11871 df-nn 12233 df-2 12302 df-3 12303 df-n0 12504 df-z 12591 df-uz 12862 df-q 12972 df-rp 13016 df-xneg 13136 df-xadd 13137 df-xmul 13138 df-ioo 13375 df-ioc 13376 df-ico 13377 df-icc 13378 df-seq 14037 df-exp 14097 df-cj 15149 df-re 15150 df-im 15151 df-sqrt 15285 df-abs 15286 df-rest 17474 df-topgen 17495 df-ordt 17554 df-ps 18621 df-tsr 18622 df-psmet 21482 df-xmet 21483 df-met 21484 df-bl 21485 df-mopn 21486 df-top 23019 df-topon 23036 df-bases 23071 df-cld 23144 df-ii 25004 |
| This theorem is referenced by: sepfsepc 49590 seppcld 49592 |
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