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Mirrors > Home > MPE Home > Th. List > ordtopn3 | Structured version Visualization version GIF version |
Description: An open interval (𝐴, 𝐵) is open. (Contributed by Mario Carneiro, 3-Sep-2015.) |
Ref | Expression |
---|---|
ordttopon.3 | ⊢ 𝑋 = dom 𝑅 |
Ref | Expression |
---|---|
ordtopn3 | ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ (¬ 𝑥𝑅𝐴 ∧ ¬ 𝐵𝑅𝑥)} ∈ (ordTop‘𝑅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | inrab 4246 | . 2 ⊢ ({𝑥 ∈ 𝑋 ∣ ¬ 𝑥𝑅𝐴} ∩ {𝑥 ∈ 𝑋 ∣ ¬ 𝐵𝑅𝑥}) = {𝑥 ∈ 𝑋 ∣ (¬ 𝑥𝑅𝐴 ∧ ¬ 𝐵𝑅𝑥)} | |
2 | ordttopon.3 | . . . . . 6 ⊢ 𝑋 = dom 𝑅 | |
3 | 2 | ordttopon 22342 | . . . . 5 ⊢ (𝑅 ∈ 𝑉 → (ordTop‘𝑅) ∈ (TopOn‘𝑋)) |
4 | 3 | 3ad2ant1 1132 | . . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (ordTop‘𝑅) ∈ (TopOn‘𝑋)) |
5 | topontop 22060 | . . . 4 ⊢ ((ordTop‘𝑅) ∈ (TopOn‘𝑋) → (ordTop‘𝑅) ∈ Top) | |
6 | 4, 5 | syl 17 | . . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (ordTop‘𝑅) ∈ Top) |
7 | 2 | ordtopn1 22343 | . . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ ¬ 𝑥𝑅𝐴} ∈ (ordTop‘𝑅)) |
8 | 7 | 3adant3 1131 | . . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ ¬ 𝑥𝑅𝐴} ∈ (ordTop‘𝑅)) |
9 | 2 | ordtopn2 22344 | . . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐵 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ ¬ 𝐵𝑅𝑥} ∈ (ordTop‘𝑅)) |
10 | 9 | 3adant2 1130 | . . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ ¬ 𝐵𝑅𝑥} ∈ (ordTop‘𝑅)) |
11 | inopn 22046 | . . 3 ⊢ (((ordTop‘𝑅) ∈ Top ∧ {𝑥 ∈ 𝑋 ∣ ¬ 𝑥𝑅𝐴} ∈ (ordTop‘𝑅) ∧ {𝑥 ∈ 𝑋 ∣ ¬ 𝐵𝑅𝑥} ∈ (ordTop‘𝑅)) → ({𝑥 ∈ 𝑋 ∣ ¬ 𝑥𝑅𝐴} ∩ {𝑥 ∈ 𝑋 ∣ ¬ 𝐵𝑅𝑥}) ∈ (ordTop‘𝑅)) | |
12 | 6, 8, 10, 11 | syl3anc 1370 | . 2 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ({𝑥 ∈ 𝑋 ∣ ¬ 𝑥𝑅𝐴} ∩ {𝑥 ∈ 𝑋 ∣ ¬ 𝐵𝑅𝑥}) ∈ (ordTop‘𝑅)) |
13 | 1, 12 | eqeltrrid 2846 | 1 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ (¬ 𝑥𝑅𝐴 ∧ ¬ 𝐵𝑅𝑥)} ∈ (ordTop‘𝑅)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 ∧ w3a 1086 = wceq 1542 ∈ wcel 2110 {crab 3070 ∩ cin 3891 class class class wbr 5079 dom cdm 5590 ‘cfv 6432 ordTopcordt 17208 Topctop 22040 TopOnctopon 22057 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7582 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-ral 3071 df-rex 3072 df-reu 3073 df-rab 3075 df-v 3433 df-sbc 3721 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 4568 df-pr 4570 df-op 4574 df-uni 4846 df-int 4886 df-br 5080 df-opab 5142 df-mpt 5163 df-tr 5197 df-id 5490 df-eprel 5496 df-po 5504 df-so 5505 df-fr 5545 df-we 5547 df-xp 5596 df-rel 5597 df-cnv 5598 df-co 5599 df-dm 5600 df-rn 5601 df-res 5602 df-ima 5603 df-ord 6268 df-on 6269 df-lim 6270 df-suc 6271 df-iota 6390 df-fun 6434 df-fn 6435 df-f 6436 df-f1 6437 df-fo 6438 df-f1o 6439 df-fv 6440 df-om 7707 df-1o 8288 df-er 8481 df-en 8717 df-fin 8720 df-fi 9148 df-topgen 17152 df-ordt 17210 df-top 22041 df-topon 22058 df-bases 22094 |
This theorem is referenced by: (None) |
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