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Mirrors > Home > MPE Home > Th. List > latmcom | Structured version Visualization version GIF version |
Description: The join of a lattice commutes. (Contributed by NM, 6-Nov-2011.) |
Ref | Expression |
---|---|
latmcom.b | ⊢ 𝐵 = (Base‘𝐾) |
latmcom.m | ⊢ ∧ = (meet‘𝐾) |
Ref | Expression |
---|---|
latmcom | ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ∧ 𝑌) = (𝑌 ∧ 𝑋)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opelxpi 5617 | . . . . 5 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 〈𝑋, 𝑌〉 ∈ (𝐵 × 𝐵)) | |
2 | 1 | 3adant1 1128 | . . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 〈𝑋, 𝑌〉 ∈ (𝐵 × 𝐵)) |
3 | latmcom.b | . . . . . . 7 ⊢ 𝐵 = (Base‘𝐾) | |
4 | eqid 2738 | . . . . . . 7 ⊢ (join‘𝐾) = (join‘𝐾) | |
5 | latmcom.m | . . . . . . 7 ⊢ ∧ = (meet‘𝐾) | |
6 | 3, 4, 5 | islat 18066 | . . . . . 6 ⊢ (𝐾 ∈ Lat ↔ (𝐾 ∈ Poset ∧ (dom (join‘𝐾) = (𝐵 × 𝐵) ∧ dom ∧ = (𝐵 × 𝐵)))) |
7 | simprr 769 | . . . . . 6 ⊢ ((𝐾 ∈ Poset ∧ (dom (join‘𝐾) = (𝐵 × 𝐵) ∧ dom ∧ = (𝐵 × 𝐵))) → dom ∧ = (𝐵 × 𝐵)) | |
8 | 6, 7 | sylbi 216 | . . . . 5 ⊢ (𝐾 ∈ Lat → dom ∧ = (𝐵 × 𝐵)) |
9 | 8 | 3ad2ant1 1131 | . . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → dom ∧ = (𝐵 × 𝐵)) |
10 | 2, 9 | eleqtrrd 2842 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 〈𝑋, 𝑌〉 ∈ dom ∧ ) |
11 | opelxpi 5617 | . . . . . 6 ⊢ ((𝑌 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵) → 〈𝑌, 𝑋〉 ∈ (𝐵 × 𝐵)) | |
12 | 11 | ancoms 458 | . . . . 5 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 〈𝑌, 𝑋〉 ∈ (𝐵 × 𝐵)) |
13 | 12 | 3adant1 1128 | . . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 〈𝑌, 𝑋〉 ∈ (𝐵 × 𝐵)) |
14 | 13, 9 | eleqtrrd 2842 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 〈𝑌, 𝑋〉 ∈ dom ∧ ) |
15 | 10, 14 | jca 511 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (〈𝑋, 𝑌〉 ∈ dom ∧ ∧ 〈𝑌, 𝑋〉 ∈ dom ∧ )) |
16 | latpos 18071 | . . 3 ⊢ (𝐾 ∈ Lat → 𝐾 ∈ Poset) | |
17 | 3, 5 | meetcom 18037 | . . 3 ⊢ (((𝐾 ∈ Poset ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (〈𝑋, 𝑌〉 ∈ dom ∧ ∧ 〈𝑌, 𝑋〉 ∈ dom ∧ )) → (𝑋 ∧ 𝑌) = (𝑌 ∧ 𝑋)) |
18 | 16, 17 | syl3anl1 1410 | . 2 ⊢ (((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) ∧ (〈𝑋, 𝑌〉 ∈ dom ∧ ∧ 〈𝑌, 𝑋〉 ∈ dom ∧ )) → (𝑋 ∧ 𝑌) = (𝑌 ∧ 𝑋)) |
19 | 15, 18 | mpdan 683 | 1 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ∧ 𝑌) = (𝑌 ∧ 𝑋)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 〈cop 4564 × cxp 5578 dom cdm 5580 ‘cfv 6418 (class class class)co 7255 Basecbs 16840 Posetcpo 17940 joincjn 17944 meetcmee 17945 Latclat 18064 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-glb 17980 df-meet 17982 df-lat 18065 |
This theorem is referenced by: latleeqm2 18101 latmlem2 18103 latmlej21 18113 latmlej22 18114 mod2ile 18127 olm12 37169 latm12 37171 latm32 37172 latmrot 37173 olm02 37178 omllaw2N 37185 cmtcomlemN 37189 cmtbr3N 37195 omlfh1N 37199 omlmod1i2N 37201 omlspjN 37202 cvlcvrp 37281 intnatN 37348 cvrexch 37361 cvrat4 37384 2atjm 37386 1cvrat 37417 2at0mat0 37466 dalem4 37606 dalem56 37669 atmod2i1 37802 atmod2i2 37803 llnmod2i2 37804 atmod3i1 37805 atmod3i2 37806 llnexchb2lem 37809 dalawlem3 37814 dalawlem4 37815 dalawlem6 37817 dalawlem9 37820 dalawlem11 37822 dalawlem12 37823 dalawlem15 37826 lhpmcvr 37964 4atexlemc 38010 cdleme20zN 38242 cdleme20d 38253 cdleme20l 38263 cdleme20m 38264 cdlemg12 38591 cdlemg17 38618 cdlemg19 38625 cdlemg44a 38672 dihmeetlem17N 39264 dihmeetlem20N 39267 dihmeetALTN 39268 |
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