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Mirrors > Home > MPE Home > Th. List > ordtcld3 | Structured version Visualization version GIF version |
Description: A closed interval [𝐴, 𝐵] is closed. (Contributed by Mario Carneiro, 3-Sep-2015.) |
Ref | Expression |
---|---|
ordttopon.3 | ⊢ 𝑋 = dom 𝑅 |
Ref | Expression |
---|---|
ordtcld3 | ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ (𝐴𝑅𝑥 ∧ 𝑥𝑅𝐵)} ∈ (Clsd‘(ordTop‘𝑅))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | inrab 4237 | . 2 ⊢ ({𝑥 ∈ 𝑋 ∣ 𝐴𝑅𝑥} ∩ {𝑥 ∈ 𝑋 ∣ 𝑥𝑅𝐵}) = {𝑥 ∈ 𝑋 ∣ (𝐴𝑅𝑥 ∧ 𝑥𝑅𝐵)} | |
2 | ordttopon.3 | . . . . 5 ⊢ 𝑋 = dom 𝑅 | |
3 | 2 | ordtcld2 22124 | . . . 4 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ 𝐴𝑅𝑥} ∈ (Clsd‘(ordTop‘𝑅))) |
4 | 3 | 3adant3 1134 | . . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ 𝐴𝑅𝑥} ∈ (Clsd‘(ordTop‘𝑅))) |
5 | 2 | ordtcld1 22123 | . . 3 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐵 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ 𝑥𝑅𝐵} ∈ (Clsd‘(ordTop‘𝑅))) |
6 | incld 21969 | . . 3 ⊢ (({𝑥 ∈ 𝑋 ∣ 𝐴𝑅𝑥} ∈ (Clsd‘(ordTop‘𝑅)) ∧ {𝑥 ∈ 𝑋 ∣ 𝑥𝑅𝐵} ∈ (Clsd‘(ordTop‘𝑅))) → ({𝑥 ∈ 𝑋 ∣ 𝐴𝑅𝑥} ∩ {𝑥 ∈ 𝑋 ∣ 𝑥𝑅𝐵}) ∈ (Clsd‘(ordTop‘𝑅))) | |
7 | 4, 5, 6 | 3imp3i2an 1347 | . 2 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → ({𝑥 ∈ 𝑋 ∣ 𝐴𝑅𝑥} ∩ {𝑥 ∈ 𝑋 ∣ 𝑥𝑅𝐵}) ∈ (Clsd‘(ordTop‘𝑅))) |
8 | 1, 7 | eqeltrrid 2845 | 1 ⊢ ((𝑅 ∈ 𝑉 ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → {𝑥 ∈ 𝑋 ∣ (𝐴𝑅𝑥 ∧ 𝑥𝑅𝐵)} ∈ (Clsd‘(ordTop‘𝑅))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∧ w3a 1089 = wceq 1543 ∈ wcel 2112 {crab 3067 ∩ cin 3881 class class class wbr 5069 dom cdm 5568 ‘cfv 6400 ordTopcordt 17034 Clsdccld 21942 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2710 ax-sep 5208 ax-nul 5215 ax-pow 5274 ax-pr 5338 ax-un 7544 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2818 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3711 df-dif 3885 df-un 3887 df-in 3889 df-ss 3899 df-pss 3901 df-nul 4254 df-if 4456 df-pw 4531 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4836 df-int 4876 df-iun 4922 df-iin 4923 df-br 5070 df-opab 5132 df-mpt 5152 df-tr 5178 df-id 5471 df-eprel 5477 df-po 5485 df-so 5486 df-fr 5526 df-we 5528 df-xp 5574 df-rel 5575 df-cnv 5576 df-co 5577 df-dm 5578 df-rn 5579 df-res 5580 df-ima 5581 df-ord 6236 df-on 6237 df-lim 6238 df-suc 6239 df-iota 6358 df-fun 6402 df-fn 6403 df-f 6404 df-f1 6405 df-fo 6406 df-f1o 6407 df-fv 6408 df-om 7666 df-1o 8225 df-er 8414 df-en 8650 df-fin 8653 df-fi 9054 df-topgen 16978 df-ordt 17036 df-top 21820 df-topon 21837 df-bases 21872 df-cld 21945 |
This theorem is referenced by: iccordt 22140 ordtt1 22305 |
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