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| Mirrors > Home > MPE Home > Th. List > clatlem | Structured version Visualization version GIF version | ||
| Description: Lemma for properties of a complete lattice. (Contributed by NM, 14-Sep-2011.) |
| Ref | Expression |
|---|---|
| clatlem.b | ⊢ 𝐵 = (Base‘𝐾) |
| clatlem.u | ⊢ 𝑈 = (lub‘𝐾) |
| clatlem.g | ⊢ 𝐺 = (glb‘𝐾) |
| Ref | Expression |
|---|---|
| clatlem | ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → ((𝑈‘𝑆) ∈ 𝐵 ∧ (𝐺‘𝑆) ∈ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | clatlem.b | . . 3 ⊢ 𝐵 = (Base‘𝐾) | |
| 2 | clatlem.u | . . 3 ⊢ 𝑈 = (lub‘𝐾) | |
| 3 | simpl 488 | . . 3 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → 𝐾 ∈ CLat) | |
| 4 | 1 | fvexi 6899 | . . . . . 6 ⊢ 𝐵 ∈ V |
| 5 | 4 | elpw2 5307 | . . . . 5 ⊢ (𝑆 ∈ 𝒫 𝐵 ↔ 𝑆 ⊆ 𝐵) |
| 6 | 5 | bilanri 512 | . . . 4 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → 𝑆 ∈ 𝒫 𝐵) |
| 7 | clatlem.g | . . . . . . 7 ⊢ 𝐺 = (glb‘𝐾) | |
| 8 | 1, 2, 7 | isclat 18573 | . . . . . 6 ⊢ (𝐾 ∈ CLat ↔ (𝐾 ∈ Poset ∧ (dom 𝑈 = 𝒫 𝐵 ∧ dom 𝐺 = 𝒫 𝐵))) |
| 9 | 8 | birani 509 | . . . . 5 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → (𝐾 ∈ Poset ∧ (dom 𝑈 = 𝒫 𝐵 ∧ dom 𝐺 = 𝒫 𝐵))) |
| 10 | 9 | simprld 784 | . . . 4 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → dom 𝑈 = 𝒫 𝐵) |
| 11 | 6, 10 | eleqtrrd 2868 | . . 3 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → 𝑆 ∈ dom 𝑈) |
| 12 | 1, 2, 3, 11 | lubcl 18428 | . 2 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → (𝑈‘𝑆) ∈ 𝐵) |
| 13 | 9 | simprrd 786 | . . . 4 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → dom 𝐺 = 𝒫 𝐵) |
| 14 | 6, 13 | eleqtrrd 2868 | . . 3 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → 𝑆 ∈ dom 𝐺) |
| 15 | 1, 7, 3, 14 | glbcl 18441 | . 2 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → (𝐺‘𝑆) ∈ 𝐵) |
| 16 | 12, 15 | jca 521 | 1 ⊢ ((𝐾 ∈ CLat ∧ 𝑆 ⊆ 𝐵) → ((𝑈‘𝑆) ∈ 𝐵 ∧ (𝐺‘𝑆) ∈ 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 ⊆ wss 3906 𝒫 cpw 4564 dom cdm 5663 ‘cfv 6540 Basecbs 17286 Posetcpo 18380 lubclub 18382 glbcglb 18383 CLatccla 18571 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7373 df-lub 18417 df-glb 18418 df-clat 18572 |
| This theorem is used by: clatlubcl 18576 clatglbcl 18578 |
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