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Mirrors > Home > MPE Home > Th. List > latjidm | Structured version Visualization version GIF version |
Description: Lattice join is idempotent. (Contributed by NM, 8-Oct-2011.) |
Ref | Expression |
---|---|
latidm.b | ⊢ 𝐵 = (Base‘𝐾) |
latidm.j | ⊢ ∨ = (join‘𝐾) |
Ref | Expression |
---|---|
latjidm | ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → (𝑋 ∨ 𝑋) = 𝑋) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | latidm.b | . 2 ⊢ 𝐵 = (Base‘𝐾) | |
2 | eqid 2821 | . 2 ⊢ (le‘𝐾) = (le‘𝐾) | |
3 | simpl 485 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → 𝐾 ∈ Lat) | |
4 | latidm.j | . . . 4 ⊢ ∨ = (join‘𝐾) | |
5 | 1, 4 | latjcl 17661 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵) → (𝑋 ∨ 𝑋) ∈ 𝐵) |
6 | 5 | 3anidm23 1417 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → (𝑋 ∨ 𝑋) ∈ 𝐵) |
7 | simpr 487 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → 𝑋 ∈ 𝐵) | |
8 | 1, 2 | latref 17663 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → 𝑋(le‘𝐾)𝑋) |
9 | 1, 2, 4 | latjle12 17672 | . . . 4 ⊢ ((𝐾 ∈ Lat ∧ (𝑋 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵)) → ((𝑋(le‘𝐾)𝑋 ∧ 𝑋(le‘𝐾)𝑋) ↔ (𝑋 ∨ 𝑋)(le‘𝐾)𝑋)) |
10 | 3, 7, 7, 7, 9 | syl13anc 1368 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → ((𝑋(le‘𝐾)𝑋 ∧ 𝑋(le‘𝐾)𝑋) ↔ (𝑋 ∨ 𝑋)(le‘𝐾)𝑋)) |
11 | 8, 8, 10 | mpbi2and 710 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → (𝑋 ∨ 𝑋)(le‘𝐾)𝑋) |
12 | 1, 2, 4 | latlej1 17670 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵) → 𝑋(le‘𝐾)(𝑋 ∨ 𝑋)) |
13 | 12 | 3anidm23 1417 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → 𝑋(le‘𝐾)(𝑋 ∨ 𝑋)) |
14 | 1, 2, 3, 6, 7, 11, 13 | latasymd 17667 | 1 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → (𝑋 ∨ 𝑋) = 𝑋) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 class class class wbr 5066 ‘cfv 6355 (class class class)co 7156 Basecbs 16483 lecple 16572 joincjn 17554 Latclat 17655 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-rep 5190 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-reu 3145 df-rab 3147 df-v 3496 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-iun 4921 df-br 5067 df-opab 5129 df-mpt 5147 df-id 5460 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-iota 6314 df-fun 6357 df-fn 6358 df-f 6359 df-f1 6360 df-fo 6361 df-f1o 6362 df-fv 6363 df-riota 7114 df-ov 7159 df-oprab 7160 df-proset 17538 df-poset 17556 df-lub 17584 df-glb 17585 df-join 17586 df-meet 17587 df-lat 17656 |
This theorem is referenced by: lubsn 17704 latjjdi 17713 latjjdir 17714 cvlsupr2 36494 hlatjidm 36520 cvrat3 36593 snatpsubN 36901 dalawlem7 37028 cdleme11 37421 cdleme23b 37501 cdlemg33a 37857 trljco 37891 doca2N 38277 djajN 38288 |
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