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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 2622 | . 2 ⊢ (le‘𝐾) = (le‘𝐾) | |
3 | simpl 473 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → 𝐾 ∈ Lat) | |
4 | latidm.j | . . . 4 ⊢ ∨ = (join‘𝐾) | |
5 | 1, 4 | latjcl 17051 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵) → (𝑋 ∨ 𝑋) ∈ 𝐵) |
6 | 5 | 3anidm23 1385 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → (𝑋 ∨ 𝑋) ∈ 𝐵) |
7 | simpr 477 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → 𝑋 ∈ 𝐵) | |
8 | 1, 2 | latref 17053 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → 𝑋(le‘𝐾)𝑋) |
9 | 1, 2, 4 | latjle12 17062 | . . . 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 1328 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → ((𝑋(le‘𝐾)𝑋 ∧ 𝑋(le‘𝐾)𝑋) ↔ (𝑋 ∨ 𝑋)(le‘𝐾)𝑋)) |
11 | 8, 8, 10 | mpbi2and 956 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → (𝑋 ∨ 𝑋)(le‘𝐾)𝑋) |
12 | 1, 2, 4 | latlej1 17060 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵) → 𝑋(le‘𝐾)(𝑋 ∨ 𝑋)) |
13 | 12 | 3anidm23 1385 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → 𝑋(le‘𝐾)(𝑋 ∨ 𝑋)) |
14 | 1, 2, 3, 6, 7, 11, 13 | latasymd 17057 | 1 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵) → (𝑋 ∨ 𝑋) = 𝑋) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 = wceq 1483 ∈ wcel 1990 class class class wbr 4653 ‘cfv 5888 (class class class)co 6650 Basecbs 15857 lecple 15948 joincjn 16944 Latclat 17045 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-preset 16928 df-poset 16946 df-lub 16974 df-glb 16975 df-join 16976 df-meet 16977 df-lat 17046 |
This theorem is referenced by: lubsn 17094 latjjdi 17103 latjjdir 17104 cvlsupr2 34630 hlatjidm 34655 cvrat3 34728 snatpsubN 35036 dalawlem7 35163 cdleme11 35557 cdleme23b 35638 cdlemg33a 35994 trljco 36028 doca2N 36415 djajN 36426 |
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