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Mirrors > Home > MPE Home > Th. List > iooordt | Structured version Visualization version GIF version |
Description: An open interval is open in the order topology of the extended reals. (Contributed by Mario Carneiro, 3-Sep-2015.) |
Ref | Expression |
---|---|
iooordt | ⊢ (𝐴(,)𝐵) ∈ (ordTop‘ ≤ ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2736 | . . . . . . 7 ⊢ ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) = ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) | |
2 | eqid 2736 | . . . . . . 7 ⊢ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥)) = ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥)) | |
3 | eqid 2736 | . . . . . . 7 ⊢ ran (,) = ran (,) | |
4 | 1, 2, 3 | leordtval 22413 | . . . . . 6 ⊢ (ordTop‘ ≤ ) = (topGen‘((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,))) |
5 | letop 22406 | . . . . . 6 ⊢ (ordTop‘ ≤ ) ∈ Top | |
6 | 4, 5 | eqeltrri 2834 | . . . . 5 ⊢ (topGen‘((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,))) ∈ Top |
7 | tgclb 22169 | . . . . 5 ⊢ (((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,)) ∈ TopBases ↔ (topGen‘((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,))) ∈ Top) | |
8 | 6, 7 | mpbir 230 | . . . 4 ⊢ ((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,)) ∈ TopBases |
9 | bastg 22165 | . . . 4 ⊢ (((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,)) ∈ TopBases → ((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,)) ⊆ (topGen‘((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,)))) | |
10 | 8, 9 | ax-mp 5 | . . 3 ⊢ ((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,)) ⊆ (topGen‘((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,))) |
11 | 10, 4 | sseqtrri 3963 | . 2 ⊢ ((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,)) ⊆ (ordTop‘ ≤ ) |
12 | ssun2 4113 | . . 3 ⊢ ran (,) ⊆ ((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,)) | |
13 | ioorebas 13233 | . . 3 ⊢ (𝐴(,)𝐵) ∈ ran (,) | |
14 | 12, 13 | sselii 3923 | . 2 ⊢ (𝐴(,)𝐵) ∈ ((ran (𝑥 ∈ ℝ* ↦ (𝑥(,]+∞)) ∪ ran (𝑥 ∈ ℝ* ↦ (-∞[,)𝑥))) ∪ ran (,)) |
15 | 11, 14 | sselii 3923 | 1 ⊢ (𝐴(,)𝐵) ∈ (ordTop‘ ≤ ) |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2104 ∪ cun 3890 ⊆ wss 3892 ↦ cmpt 5164 ran crn 5601 ‘cfv 6458 (class class class)co 7307 +∞cpnf 11056 -∞cmnf 11057 ℝ*cxr 11058 ≤ cle 11060 (,)cioo 13129 (,]cioc 13130 [,)cico 13131 topGenctg 17197 ordTopcordt 17259 Topctop 22091 TopBasesctb 22144 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-cnex 10977 ax-resscn 10978 ax-1cn 10979 ax-icn 10980 ax-addcl 10981 ax-addrcl 10982 ax-mulcl 10983 ax-mulrcl 10984 ax-mulcom 10985 ax-addass 10986 ax-mulass 10987 ax-distr 10988 ax-i2m1 10989 ax-1ne0 10990 ax-1rid 10991 ax-rnegex 10992 ax-rrecex 10993 ax-cnre 10994 ax-pre-lttri 10995 ax-pre-lttrn 10996 ax-pre-ltadd 10997 ax-pre-mulgt0 10998 ax-pre-sup 10999 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3304 df-reu 3305 df-rab 3306 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-int 4887 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-tr 5199 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-pred 6217 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-riota 7264 df-ov 7310 df-oprab 7311 df-mpo 7312 df-om 7745 df-1st 7863 df-2nd 7864 df-frecs 8128 df-wrecs 8159 df-recs 8233 df-rdg 8272 df-1o 8328 df-er 8529 df-en 8765 df-dom 8766 df-sdom 8767 df-fin 8768 df-fi 9218 df-sup 9249 df-inf 9250 df-pnf 11061 df-mnf 11062 df-xr 11063 df-ltxr 11064 df-le 11065 df-sub 11257 df-neg 11258 df-div 11683 df-nn 12024 df-n0 12284 df-z 12370 df-uz 12633 df-q 12739 df-ioo 13133 df-ioc 13134 df-ico 13135 df-icc 13136 df-topgen 17203 df-ordt 17261 df-ps 18333 df-tsr 18334 df-top 22092 df-topon 22109 df-bases 22145 |
This theorem is referenced by: reordt 22418 xrtgioo 24018 xlimxrre 43601 |
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