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Mirrors > Home > MPE Home > Th. List > clatglble | Structured version Visualization version GIF version |
Description: The greatest lower bound is the least element. (Contributed by NM, 5-Dec-2011.) |
Ref | Expression |
---|---|
clatglb.b | ⊢ 𝐵 = (Base‘𝐾) |
clatglb.l | ⊢ ≤ = (le‘𝐾) |
clatglb.g | ⊢ 𝐺 = (glb‘𝐾) |
Ref | Expression |
---|---|
clatglble | ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵 ∧ 𝑋 ∈ 𝑆) → (𝐺‘𝑆) ≤ 𝑋) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | clatglb.b | . 2 ⊢ 𝐵 = (Base‘𝐾) | |
2 | clatglb.l | . 2 ⊢ ≤ = (le‘𝐾) | |
3 | clatglb.g | . 2 ⊢ 𝐺 = (glb‘𝐾) | |
4 | simp1 1133 | . 2 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵 ∧ 𝑋 ∈ 𝑆) → 𝐾 ∈ CLat) | |
5 | 1, 3 | clatglbcl2 17717 | . . 3 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → 𝑆 ∈ dom 𝐺) |
6 | 5 | 3adant3 1129 | . 2 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵 ∧ 𝑋 ∈ 𝑆) → 𝑆 ∈ dom 𝐺) |
7 | simp3 1135 | . 2 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵 ∧ 𝑋 ∈ 𝑆) → 𝑋 ∈ 𝑆) | |
8 | 1, 2, 3, 4, 6, 7 | glble 17602 | 1 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵 ∧ 𝑋 ∈ 𝑆) → (𝐺‘𝑆) ≤ 𝑋) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1084 = wceq 1538 ∈ wcel 2111 ⊆ wss 3881 class class class wbr 5030 dom cdm 5519 ‘cfv 6324 Basecbs 16475 lecple 16564 glbcglb 17545 CLatccla 17709 |
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 2770 ax-rep 5154 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-ral 3111 df-rex 3112 df-reu 3113 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-riota 7093 df-glb 17577 df-clat 17710 |
This theorem is referenced by: clatleglb 17728 clatglbss 17729 diaglbN 38351 diaintclN 38354 dibglbN 38462 dibintclN 38463 dihglblem2N 38590 dihglblem4 38593 dihglbcpreN 38596 dochvalr 38653 |
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