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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 13436, iccordt 23371, and ordtresticc 23380 are proved from ixxss12 13387, ordtcld3 23356, and ordtrest2 23361, respectively. An alternate proof uses restcldi 23330, dfii2 25041, and icccld 24923. (Contributed by Zhi Wang, 8-Sep-2024.) |
| Ref | Expression |
|---|---|
| icccldii | ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘II)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iccssxr 13452 | . . 3 ⊢ (0[,]1) ⊆ ℝ* | |
| 2 | iccordt 23371 | . . 3 ⊢ (𝐴[,]𝐵) ∈ (Clsd‘(ordTop‘ ≤ )) | |
| 3 | 0re 11205 | . . . 4 ⊢ 0 ∈ ℝ | |
| 4 | 1re 11203 | . . . 4 ⊢ 1 ∈ ℝ | |
| 5 | iccss 13436 | . . . 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 23364 | . . . 4 ⊢ ℝ* = ∪ (ordTop‘ ≤ ) | |
| 8 | 7 | restcldi 23330 | . . 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 1494 | . 2 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘((ordTop‘ ≤ ) ↾t (0[,]1)))) |
| 10 | dfii5 25044 | . . . 4 ⊢ II = (ordTop‘( ≤ ∩ ((0[,]1) × (0[,]1)))) | |
| 11 | ordtresticc 23380 | . . . 4 ⊢ ((ordTop‘ ≤ ) ↾t (0[,]1)) = (ordTop‘( ≤ ∩ ((0[,]1) × (0[,]1)))) | |
| 12 | 10, 11 | eqtr4i 2789 | . . 3 ⊢ II = ((ordTop‘ ≤ ) ↾t (0[,]1)) |
| 13 | 12 | fveq2i 6884 | . 2 ⊢ (Clsd‘II) = (Clsd‘((ordTop‘ ≤ ) ↾t (0[,]1))) |
| 14 | 9, 13 | eleqtrrdi 2874 | 1 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘II)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∈ wcel 2143 ∩ cin 3904 ⊆ wss 3905 class class class wbr 5109 × cxp 5659 ‘cfv 6536 (class class class)co 7410 ℝcr 11094 0cc0 11095 1c1 11096 ℝ*cxr 11237 ≤ cle 11239 [,]cicc 13370 ↾t crest 17468 ordTopcordt 17548 Clsdccld 23173 IIcii 25034 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11151 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 ax-pre-mulgt0 11172 ax-pre-sup 11173 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-int 4913 df-iun 4958 df-iin 4959 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-2o 8450 df-er 8690 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-fi 9367 df-sup 9398 df-inf 9399 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 df-sub 11438 df-neg 11439 df-div 11867 df-nn 12229 df-2 12298 df-3 12299 df-n0 12500 df-z 12587 df-uz 12858 df-q 12968 df-rp 13012 df-xneg 13132 df-xadd 13133 df-xmul 13134 df-ioo 13371 df-ioc 13372 df-ico 13373 df-icc 13374 df-seq 14034 df-exp 14094 df-cj 15146 df-re 15147 df-im 15148 df-sqrt 15282 df-abs 15283 df-rest 17470 df-topgen 17491 df-ordt 17550 df-ps 18617 df-tsr 18618 df-psmet 21514 df-xmet 21515 df-met 21516 df-bl 21517 df-mopn 21518 df-top 23051 df-topon 23068 df-bases 23103 df-cld 23176 df-ii 25036 |
| This theorem is referenced by: sepfsepc 49706 seppcld 49708 |
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