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Mirrors > Home > MPE Home > Th. List > latnle | Structured version Visualization version GIF version |
Description: Equivalent expressions for "not less than" in a lattice. (chnle 29396 analog.) (Contributed by NM, 16-Nov-2011.) |
Ref | Expression |
---|---|
latnle.b | ⊢ 𝐵 = (Base‘𝐾) |
latnle.l | ⊢ ≤ = (le‘𝐾) |
latnle.s | ⊢ < = (lt‘𝐾) |
latnle.j | ⊢ ∨ = (join‘𝐾) |
Ref | Expression |
---|---|
latnle | ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (¬ 𝑌 ≤ 𝑋 ↔ 𝑋 < (𝑋 ∨ 𝑌))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | latnle.b | . . . 4 ⊢ 𝐵 = (Base‘𝐾) | |
2 | latnle.l | . . . 4 ⊢ ≤ = (le‘𝐾) | |
3 | latnle.j | . . . 4 ⊢ ∨ = (join‘𝐾) | |
4 | 1, 2, 3 | latlej1 17736 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → 𝑋 ≤ (𝑋 ∨ 𝑌)) |
5 | 4 | biantrurd 536 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ≠ (𝑋 ∨ 𝑌) ↔ (𝑋 ≤ (𝑋 ∨ 𝑌) ∧ 𝑋 ≠ (𝑋 ∨ 𝑌)))) |
6 | 1, 2, 3 | latleeqj1 17739 | . . . . . 6 ⊢ ((𝐾 ∈ Lat ∧ 𝑌 ∈ 𝐵 ∧ 𝑋 ∈ 𝐵) → (𝑌 ≤ 𝑋 ↔ (𝑌 ∨ 𝑋) = 𝑋)) |
7 | 6 | 3com23 1123 | . . . . 5 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑌 ≤ 𝑋 ↔ (𝑌 ∨ 𝑋) = 𝑋)) |
8 | eqcom 2765 | . . . . 5 ⊢ ((𝑌 ∨ 𝑋) = 𝑋 ↔ 𝑋 = (𝑌 ∨ 𝑋)) | |
9 | 7, 8 | bitrdi 290 | . . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑌 ≤ 𝑋 ↔ 𝑋 = (𝑌 ∨ 𝑋))) |
10 | 1, 3 | latjcom 17735 | . . . . 5 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ∨ 𝑌) = (𝑌 ∨ 𝑋)) |
11 | 10 | eqeq2d 2769 | . . . 4 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 = (𝑋 ∨ 𝑌) ↔ 𝑋 = (𝑌 ∨ 𝑋))) |
12 | 9, 11 | bitr4d 285 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑌 ≤ 𝑋 ↔ 𝑋 = (𝑋 ∨ 𝑌))) |
13 | 12 | necon3bbid 2988 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (¬ 𝑌 ≤ 𝑋 ↔ 𝑋 ≠ (𝑋 ∨ 𝑌))) |
14 | 1, 3 | latjcl 17727 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 ∨ 𝑌) ∈ 𝐵) |
15 | latnle.s | . . . 4 ⊢ < = (lt‘𝐾) | |
16 | 2, 15 | pltval 17636 | . . 3 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ (𝑋 ∨ 𝑌) ∈ 𝐵) → (𝑋 < (𝑋 ∨ 𝑌) ↔ (𝑋 ≤ (𝑋 ∨ 𝑌) ∧ 𝑋 ≠ (𝑋 ∨ 𝑌)))) |
17 | 14, 16 | syld3an3 1406 | . 2 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 < (𝑋 ∨ 𝑌) ↔ (𝑋 ≤ (𝑋 ∨ 𝑌) ∧ 𝑋 ≠ (𝑋 ∨ 𝑌)))) |
18 | 5, 13, 17 | 3bitr4d 314 | 1 ⊢ ((𝐾 ∈ Lat ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (¬ 𝑌 ≤ 𝑋 ↔ 𝑋 < (𝑋 ∨ 𝑌))) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 399 ∧ w3a 1084 = wceq 1538 ∈ wcel 2111 ≠ wne 2951 class class class wbr 5032 ‘cfv 6335 (class class class)co 7150 Basecbs 16541 lecple 16630 ltcplt 17617 joincjn 17620 Latclat 17721 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2729 ax-rep 5156 ax-sep 5169 ax-nul 5176 ax-pow 5234 ax-pr 5298 ax-un 7459 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-ral 3075 df-rex 3076 df-reu 3077 df-rab 3079 df-v 3411 df-sbc 3697 df-csb 3806 df-dif 3861 df-un 3863 df-in 3865 df-ss 3875 df-nul 4226 df-if 4421 df-pw 4496 df-sn 4523 df-pr 4525 df-op 4529 df-uni 4799 df-iun 4885 df-br 5033 df-opab 5095 df-mpt 5113 df-id 5430 df-xp 5530 df-rel 5531 df-cnv 5532 df-co 5533 df-dm 5534 df-rn 5535 df-res 5536 df-ima 5537 df-iota 6294 df-fun 6337 df-fn 6338 df-f 6339 df-f1 6340 df-fo 6341 df-f1o 6342 df-fv 6343 df-riota 7108 df-ov 7153 df-oprab 7154 df-proset 17604 df-poset 17622 df-plt 17634 df-lub 17650 df-glb 17651 df-join 17652 df-meet 17653 df-lat 17722 |
This theorem is referenced by: cvlcvr1 36915 hlrelat 36978 hlrelat2 36979 cvr2N 36987 cvrexchlem 36995 |
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