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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 13418, iccordt 23274, and ordtresticc 23283 are proved from ixxss12 13369, ordtcld3 23259, and ordtrest2 23264, respectively. An alternate proof uses restcldi 23233, dfii2 24944, and icccld 24826. (Contributed by Zhi Wang, 8-Sep-2024.) |
| Ref | Expression |
|---|---|
| icccldii | ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘II)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iccssxr 13434 | . . 3 ⊢ (0[,]1) ⊆ ℝ* | |
| 2 | iccordt 23274 | . . 3 ⊢ (𝐴[,]𝐵) ∈ (Clsd‘(ordTop‘ ≤ )) | |
| 3 | 0re 11183 | . . . 4 ⊢ 0 ∈ ℝ | |
| 4 | 1re 11181 | . . . 4 ⊢ 1 ∈ ℝ | |
| 5 | iccss 13418 | . . . 4 ⊢ (((0 ∈ ℝ ∧ 1 ∈ ℝ) ∧ (0 ≤ 𝐴 ∧ 𝐵 ≤ 1)) → (𝐴[,]𝐵) ⊆ (0[,]1)) | |
| 6 | 3, 4, 5 | mpanl12 712 | . . 3 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ⊆ (0[,]1)) |
| 7 | letopuni 23267 | . . . 4 ⊢ ℝ* = ∪ (ordTop‘ ≤ ) | |
| 8 | 7 | restcldi 23233 | . . 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 1486 | . 2 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘((ordTop‘ ≤ ) ↾t (0[,]1)))) |
| 10 | dfii5 24947 | . . . 4 ⊢ II = (ordTop‘( ≤ ∩ ((0[,]1) × (0[,]1)))) | |
| 11 | ordtresticc 23283 | . . . 4 ⊢ ((ordTop‘ ≤ ) ↾t (0[,]1)) = (ordTop‘( ≤ ∩ ((0[,]1) × (0[,]1)))) | |
| 12 | 10, 11 | eqtr4i 2788 | . . 3 ⊢ II = ((ordTop‘ ≤ ) ↾t (0[,]1)) |
| 13 | 12 | fveq2i 6870 | . 2 ⊢ (Clsd‘II) = (Clsd‘((ordTop‘ ≤ ) ↾t (0[,]1))) |
| 14 | 9, 13 | eleqtrrdi 2873 | 1 ⊢ ((0 ≤ 𝐴 ∧ 𝐵 ≤ 1) → (𝐴[,]𝐵) ∈ (Clsd‘II)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 ∈ wcel 2142 ∩ cin 3903 ⊆ wss 3904 class class class wbr 5100 × cxp 5645 ‘cfv 6521 (class class class)co 7396 ℝcr 11072 0cc0 11073 1c1 11074 ℝ*cxr 11215 ≤ cle 11217 [,]cicc 13352 ↾t crest 17449 ordTopcordt 17529 Clsdccld 23076 IIcii 24937 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5227 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 ax-cnex 11129 ax-resscn 11130 ax-1cn 11131 ax-icn 11132 ax-addcl 11133 ax-addrcl 11134 ax-mulcl 11135 ax-mulrcl 11136 ax-mulcom 11137 ax-addass 11138 ax-mulass 11139 ax-distr 11140 ax-i2m1 11141 ax-1ne0 11142 ax-1rid 11143 ax-rnegex 11144 ax-rrecex 11145 ax-cnre 11146 ax-pre-lttri 11147 ax-pre-lttrn 11148 ax-pre-ltadd 11149 ax-pre-mulgt0 11150 ax-pre-sup 11151 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1099 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3456 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-int 4906 df-iun 4951 df-iin 4952 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6288 df-ord 6349 df-on 6350 df-lim 6351 df-suc 6352 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-riota 7353 df-ov 7399 df-oprab 7400 df-mpo 7401 df-om 7847 df-1st 7970 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8381 df-1o 8437 df-2o 8438 df-er 8678 df-map 8810 df-en 8928 df-dom 8929 df-sdom 8930 df-fin 8931 df-fi 9357 df-sup 9388 df-inf 9389 df-pnf 11218 df-mnf 11219 df-xr 11220 df-ltxr 11221 df-le 11222 df-sub 11416 df-neg 11417 df-div 11845 df-nn 12211 df-2 12280 df-3 12281 df-n0 12482 df-z 12569 df-uz 12840 df-q 12950 df-rp 12994 df-xneg 13114 df-xadd 13115 df-xmul 13116 df-ioo 13353 df-ioc 13354 df-ico 13355 df-icc 13356 df-seq 14015 df-exp 14075 df-cj 15126 df-re 15127 df-im 15128 df-sqrt 15262 df-abs 15263 df-rest 17451 df-topgen 17472 df-ordt 17531 df-ps 18598 df-tsr 18599 df-psmet 21416 df-xmet 21417 df-met 21418 df-bl 21419 df-mopn 21420 df-top 22954 df-topon 22971 df-bases 23006 df-cld 23079 df-ii 24939 |
| This theorem is referenced by: sepfsepc 49549 seppcld 49551 |
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