dalem8 - Mathbox for Norm Megill

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Theorem dalem8 39998

Description: Lemma for dath 40064. Plane 𝑍 belongs to the 3-dimensional space. (Contributed by NM, 21-Jul-2012.)

**Hypotheses**
Ref	Expression
dalema.ph	⊢ (𝜑 ↔ (((𝐾 ∈ HL ∧ 𝐶 ∈ (Base‘𝐾)) ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴 ∧ 𝑈 ∈ 𝐴)) ∧ (𝑌 ∈ 𝑂 ∧ 𝑍 ∈ 𝑂) ∧ ((¬ 𝐶 ≤ (𝑃 ∨ 𝑄) ∧ ¬ 𝐶 ≤ (𝑄 ∨ 𝑅) ∧ ¬ 𝐶 ≤ (𝑅 ∨ 𝑃)) ∧ (¬ 𝐶 ≤ (𝑆 ∨ 𝑇) ∧ ¬ 𝐶 ≤ (𝑇 ∨ 𝑈) ∧ ¬ 𝐶 ≤ (𝑈 ∨ 𝑆)) ∧ (𝐶 ≤ (𝑃 ∨ 𝑆) ∧ 𝐶 ≤ (𝑄 ∨ 𝑇) ∧ 𝐶 ≤ (𝑅 ∨ 𝑈)))))
dalemc.l	⊢ ≤ = (le‘𝐾)
dalemc.j	⊢ ∨ = (join‘𝐾)
dalemc.a	⊢ 𝐴 = (Atoms‘𝐾)
dalem6.o	⊢ 𝑂 = (LPlanes‘𝐾)
dalem6.y	⊢ 𝑌 = ((𝑃 ∨ 𝑄) ∨ 𝑅)
dalem6.z	⊢ 𝑍 = ((𝑆 ∨ 𝑇) ∨ 𝑈)
dalem6.w	⊢ 𝑊 = (𝑌 ∨ 𝐶)

**Assertion**
Ref	Expression
dalem8	⊢ (𝜑 → 𝑍 ≤ 𝑊)

**Proof of Theorem dalem8**
Step	Hyp	Ref	Expression
1		dalem6.z	. 2 ⊢ 𝑍 = ((𝑆 ∨ 𝑇) ∨ 𝑈)
2		dalema.ph	. . . . 5 ⊢ (𝜑 ↔ (((𝐾 ∈ HL ∧ 𝐶 ∈ (Base‘𝐾)) ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴 ∧ 𝑈 ∈ 𝐴)) ∧ (𝑌 ∈ 𝑂 ∧ 𝑍 ∈ 𝑂) ∧ ((¬ 𝐶 ≤ (𝑃 ∨ 𝑄) ∧ ¬ 𝐶 ≤ (𝑄 ∨ 𝑅) ∧ ¬ 𝐶 ≤ (𝑅 ∨ 𝑃)) ∧ (¬ 𝐶 ≤ (𝑆 ∨ 𝑇) ∧ ¬ 𝐶 ≤ (𝑇 ∨ 𝑈) ∧ ¬ 𝐶 ≤ (𝑈 ∨ 𝑆)) ∧ (𝐶 ≤ (𝑃 ∨ 𝑆) ∧ 𝐶 ≤ (𝑄 ∨ 𝑇) ∧ 𝐶 ≤ (𝑅 ∨ 𝑈)))))
3		dalemc.l	. . . . 5 ⊢ ≤ = (le‘𝐾)
4		dalemc.j	. . . . 5 ⊢ ∨ = (join‘𝐾)
5		dalemc.a	. . . . 5 ⊢ 𝐴 = (Atoms‘𝐾)
6		dalem6.o	. . . . 5 ⊢ 𝑂 = (LPlanes‘𝐾)
7		dalem6.y	. . . . 5 ⊢ 𝑌 = ((𝑃 ∨ 𝑄) ∨ 𝑅)
8		dalem6.w	. . . . 5 ⊢ 𝑊 = (𝑌 ∨ 𝐶)
9	2, 3, 4, 5, 6, 7, 1, 8	dalem6 39996	. . . 4 ⊢ (𝜑 → 𝑆 ≤ 𝑊)
10	2, 3, 4, 5, 6, 7, 1, 8	dalem7 39997	. . . 4 ⊢ (𝜑 → 𝑇 ≤ 𝑊)
11	2	dalemkelat 39952	. . . . 5 ⊢ (𝜑 → 𝐾 ∈ Lat)
12	2, 5	dalemseb 39970	. . . . 5 ⊢ (𝜑 → 𝑆 ∈ (Base‘𝐾))
13	2, 5	dalemteb 39971	. . . . 5 ⊢ (𝜑 → 𝑇 ∈ (Base‘𝐾))
14	2, 6	dalemyeb 39977	. . . . . . 7 ⊢ (𝜑 → 𝑌 ∈ (Base‘𝐾))
15	2, 5	dalemceb 39966	. . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ (Base‘𝐾))
16		eqid 2737	. . . . . . . 8 ⊢ (Base‘𝐾) = (Base‘𝐾)
17	16, 4	latjcl 18366	. . . . . . 7 ⊢ ((𝐾 ∈ Lat ∧ 𝑌 ∈ (Base‘𝐾) ∧ 𝐶 ∈ (Base‘𝐾)) → (𝑌 ∨ 𝐶) ∈ (Base‘𝐾))
18	11, 14, 15, 17	syl3anc 1374	. . . . . 6 ⊢ (𝜑 → (𝑌 ∨ 𝐶) ∈ (Base‘𝐾))
19	8, 18	eqeltrid 2841	. . . . 5 ⊢ (𝜑 → 𝑊 ∈ (Base‘𝐾))
20	16, 3, 4	latjle12 18377	. . . . 5 ⊢ ((𝐾 ∈ Lat ∧ (𝑆 ∈ (Base‘𝐾) ∧ 𝑇 ∈ (Base‘𝐾) ∧ 𝑊 ∈ (Base‘𝐾))) → ((𝑆 ≤ 𝑊 ∧ 𝑇 ≤ 𝑊) ↔ (𝑆 ∨ 𝑇) ≤ 𝑊))
21	11, 12, 13, 19, 20	syl13anc 1375	. . . 4 ⊢ (𝜑 → ((𝑆 ≤ 𝑊 ∧ 𝑇 ≤ 𝑊) ↔ (𝑆 ∨ 𝑇) ≤ 𝑊))
22	9, 10, 21	mpbi2and 713	. . 3 ⊢ (𝜑 → (𝑆 ∨ 𝑇) ≤ 𝑊)
23	2, 3, 4, 5, 6, 7, 8	dalem5 39995	. . 3 ⊢ (𝜑 → 𝑈 ≤ 𝑊)
24	2, 4, 5	dalemsjteb 39974	. . . 4 ⊢ (𝜑 → (𝑆 ∨ 𝑇) ∈ (Base‘𝐾))
25	2, 5	dalemueb 39972	. . . 4 ⊢ (𝜑 → 𝑈 ∈ (Base‘𝐾))
26	16, 3, 4	latjle12 18377	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ ((𝑆 ∨ 𝑇) ∈ (Base‘𝐾) ∧ 𝑈 ∈ (Base‘𝐾) ∧ 𝑊 ∈ (Base‘𝐾))) → (((𝑆 ∨ 𝑇) ≤ 𝑊 ∧ 𝑈 ≤ 𝑊) ↔ ((𝑆 ∨ 𝑇) ∨ 𝑈) ≤ 𝑊))
27	11, 24, 25, 19, 26	syl13anc 1375	. . 3 ⊢ (𝜑 → (((𝑆 ∨ 𝑇) ≤ 𝑊 ∧ 𝑈 ≤ 𝑊) ↔ ((𝑆 ∨ 𝑇) ∨ 𝑈) ≤ 𝑊))
28	22, 23, 27	mpbi2and 713	. 2 ⊢ (𝜑 → ((𝑆 ∨ 𝑇) ∨ 𝑈) ≤ 𝑊)
29	1, 28	eqbrtrid 5134	1 ⊢ (𝜑 → 𝑍 ≤ 𝑊)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 class class class wbr 5099 ‘cfv 6493 (class class class)co 7360 Basecbs 17140 lecple 17188 joincjn 18238 Latclat 18358 Atomscatm 39591 HLchlt 39678 LPlanesclpl 39820

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 ax-un 7682

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-ov 7363 df-oprab 7364 df-proset 18221 df-poset 18240 df-plt 18255 df-lub 18271 df-glb 18272 df-join 18273 df-meet 18274 df-p0 18350 df-lat 18359 df-clat 18426 df-oposet 39504 df-ol 39506 df-oml 39507 df-covers 39594 df-ats 39595 df-atl 39626 df-cvlat 39650 df-hlat 39679 df-llines 39826 df-lplanes 39827

This theorem is referenced by: dalem13 40004

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