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| Mirrors > Home > MPE Home > Th. List > lublem | Structured version Visualization version GIF version | ||
| Description: Lemma for the least upper bound properties in a complete lattice. (Contributed by NM, 19-Oct-2011.) |
| Ref | Expression |
|---|---|
| lublem.b | ⊢ 𝐵 = (Base‘𝐾) |
| lublem.l | ⊢ ≤ = (le‘𝐾) |
| lublem.u | ⊢ 𝑈 = (lub‘𝐾) |
| Ref | Expression |
|---|---|
| lublem | ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → (∀𝑦 ∈ 𝑆 𝑦 ≤ (𝑈‘𝑆) ∧ ∀𝑧 ∈ 𝐵 (∀𝑦 ∈ 𝑆 𝑦 ≤ 𝑧 → (𝑈‘𝑆) ≤ 𝑧))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lublem.b | . 2 ⊢ 𝐵 = (Base‘𝐾) | |
| 2 | lublem.l | . 2 ⊢ ≤ = (le‘𝐾) | |
| 3 | lublem.u | . 2 ⊢ 𝑈 = (lub‘𝐾) | |
| 4 | simpl 482 | . 2 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → 𝐾 ∈ CLat) | |
| 5 | 1, 3 | clatlubcl2 18431 | . 2 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → 𝑆 ∈ dom 𝑈) |
| 6 | 1, 2, 3, 4, 5 | lubprop 18283 | 1 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → (∀𝑦 ∈ 𝑆 𝑦 ≤ (𝑈‘𝑆) ∧ ∀𝑧 ∈ 𝐵 (∀𝑦 ∈ 𝑆 𝑦 ≤ 𝑧 → (𝑈‘𝑆) ≤ 𝑧))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ∀wral 3052 ⊆ wss 3902 class class class wbr 5099 ‘cfv 6493 Basecbs 17140 lecple 17188 lubclub 18236 CLatccla 18425 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5225 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3062 df-rmo 3351 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4949 df-br 5100 df-opab 5162 df-mpt 5181 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7317 df-lub 18271 df-clat 18426 |
| This theorem is referenced by: lubub 18438 lubl 18439 |
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