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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 13361, iccordt 23192, and ordtresticc 23201 are proved from ixxss12 13312, ordtcld3 23177, and ordtrest2 23182, respectively. An alternate proof uses restcldi 23151, dfii2 24862, and icccld 24744. (Contributed by Zhi Wang, 8-Sep-2024.) |
| Ref | Expression |
|---|---|
| icccldii | ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘II)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iccssxr 13377 | . . 3 ⊢ (0[,]1) ⊆ ℝ* | |
| 2 | iccordt 23192 | . . 3 ⊢ (𝐴[,]𝐵) ∈ (Clsd‘(ordTop‘ ≤ )) | |
| 3 | 0re 11140 | . . . 4 ⊢ 0 ∈ ℝ | |
| 4 | 1re 11138 | . . . 4 ⊢ 1 ∈ ℝ | |
| 5 | iccss 13361 | . . . 4 ⊢ (((0 ∈ ℝ ∧ 1 ∈ ℝ) ∧ (0 ≤ 𝐴 ∧ 𝐵 ≤ 1)) → (𝐴[,]𝐵) ⊆ (0[,]1)) | |
| 6 | 3, 4, 5 | mpanl12 703 | . . 3 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ⊆ (0[,]1)) |
| 7 | letopuni 23185 | . . . 4 ⊢ ℝ* = ∪ (ordTop‘ ≤ ) | |
| 8 | 7 | restcldi 23151 | . . 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 1468 | . 2 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘((ordTop‘ ≤ ) ↾t (0[,]1)))) |
| 10 | dfii5 24865 | . . . 4 ⊢ II = (ordTop‘( ≤ ∩ ((0[,]1) × (0[,]1)))) | |
| 11 | ordtresticc 23201 | . . . 4 ⊢ ((ordTop‘ ≤ ) ↾t (0[,]1)) = (ordTop‘( ≤ ∩ ((0[,]1) × (0[,]1)))) | |
| 12 | 10, 11 | eqtr4i 2763 | . . 3 ⊢ II = ((ordTop‘ ≤ ) ↾t (0[,]1)) |
| 13 | 12 | fveq2i 6838 | . 2 ⊢ (Clsd‘II) = (Clsd‘((ordTop‘ ≤ ) ↾t (0[,]1))) |
| 14 | 9, 13 | eleqtrrdi 2848 | 1 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘II)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2114 ∩ cin 3889 ⊆ wss 3890 class class class wbr 5086 × cxp 5623 ‘cfv 6493 (class class class)co 7361 ℝcr 11031 0cc0 11032 1c1 11033 ℝ*cxr 11172 ≤ cle 11174 [,]cicc 13295 ↾t crest 17377 ordTopcordt 17457 Clsdccld 22994 IIcii 24855 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5213 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-pre-mulgt0 11109 ax-pre-sup 11110 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-iin 4937 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-om 7812 df-1st 7936 df-2nd 7937 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-2o 8400 df-er 8637 df-map 8769 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-fi 9318 df-sup 9349 df-inf 9350 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-sub 11373 df-neg 11374 df-div 11802 df-nn 12169 df-2 12238 df-3 12239 df-n0 12432 df-z 12519 df-uz 12783 df-q 12893 df-rp 12937 df-xneg 13057 df-xadd 13058 df-xmul 13059 df-ioo 13296 df-ioc 13297 df-ico 13298 df-icc 13299 df-seq 13958 df-exp 14018 df-cj 15055 df-re 15056 df-im 15057 df-sqrt 15191 df-abs 15192 df-rest 17379 df-topgen 17400 df-ordt 17459 df-ps 18526 df-tsr 18527 df-psmet 21339 df-xmet 21340 df-met 21341 df-bl 21342 df-mopn 21343 df-top 22872 df-topon 22889 df-bases 22924 df-cld 22997 df-ii 24857 |
| This theorem is referenced by: sepfsepc 49418 seppcld 49420 |
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