dalem8 - Mathbox for Norm Megill

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Theorem dalem8 33770

Description: Lemma for dath 33836. 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 33768	. . . 4 ⊢ (𝜑 → 𝑆 ≤ 𝑊)
10	2, 3, 4, 5, 6, 7, 1, 8	dalem7 33769	. . . 4 ⊢ (𝜑 → 𝑇 ≤ 𝑊)
11	2	dalemkelat 33724	. . . . 5 ⊢ (𝜑 → 𝐾 ∈ Lat)
12	2, 5	dalemseb 33742	. . . . 5 ⊢ (𝜑 → 𝑆 ∈ (Base‘𝐾))
13	2, 5	dalemteb 33743	. . . . 5 ⊢ (𝜑 → 𝑇 ∈ (Base‘𝐾))
14	2, 6	dalemyeb 33749	. . . . . . 7 ⊢ (𝜑 → 𝑌 ∈ (Base‘𝐾))
15	2, 5	dalemceb 33738	. . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ (Base‘𝐾))
16		eqid 2609	. . . . . . . 8 ⊢ (Base‘𝐾) = (Base‘𝐾)
17	16, 4	latjcl 16820	. . . . . . 7 ⊢ ((𝐾 ∈ Lat ∧ 𝑌 ∈ (Base‘𝐾) ∧ 𝐶 ∈ (Base‘𝐾)) → (𝑌 ∨ 𝐶) ∈ (Base‘𝐾))
18	11, 14, 15, 17	syl3anc 1317	. . . . . 6 ⊢ (𝜑 → (𝑌 ∨ 𝐶) ∈ (Base‘𝐾))
19	8, 18	syl5eqel 2691	. . . . 5 ⊢ (𝜑 → 𝑊 ∈ (Base‘𝐾))
20	16, 3, 4	latjle12 16831	. . . . 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 1319	. . . 4 ⊢ (𝜑 → ((𝑆 ≤ 𝑊 ∧ 𝑇 ≤ 𝑊) ↔ (𝑆 ∨ 𝑇) ≤ 𝑊))
22	9, 10, 21	mpbi2and 957	. . 3 ⊢ (𝜑 → (𝑆 ∨ 𝑇) ≤ 𝑊)
23	2, 3, 4, 5, 6, 7, 8	dalem5 33767	. . 3 ⊢ (𝜑 → 𝑈 ≤ 𝑊)
24	2, 4, 5	dalemsjteb 33746	. . . 4 ⊢ (𝜑 → (𝑆 ∨ 𝑇) ∈ (Base‘𝐾))
25	2, 5	dalemueb 33744	. . . 4 ⊢ (𝜑 → 𝑈 ∈ (Base‘𝐾))
26	16, 3, 4	latjle12 16831	. . . 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 1319	. . 3 ⊢ (𝜑 → (((𝑆 ∨ 𝑇) ≤ 𝑊 ∧ 𝑈 ≤ 𝑊) ↔ ((𝑆 ∨ 𝑇) ∨ 𝑈) ≤ 𝑊))
28	22, 23, 27	mpbi2and 957	. 2 ⊢ (𝜑 → ((𝑆 ∨ 𝑇) ∨ 𝑈) ≤ 𝑊)
29	1, 28	syl5eqbr 4612	1 ⊢ (𝜑 → 𝑍 ≤ 𝑊)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 194 ∧ wa 382 ∧ w3a 1030 = wceq 1474 ∈ wcel 1976 class class class wbr 4577 ‘cfv 5790 (class class class)co 6527 Basecbs 15641 lecple 15721 joincjn 16713 Latclat 16814 Atomscatm 33364 HLchlt 33451 LPlanesclpl 33592

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1712 ax-4 1727 ax-5 1826 ax-6 1874 ax-7 1921 ax-8 1978 ax-9 1985 ax-10 2005 ax-11 2020 ax-12 2033 ax-13 2233 ax-ext 2589 ax-rep 4693 ax-sep 4703 ax-nul 4712 ax-pow 4764 ax-pr 4828 ax-un 6824

This theorem depends on definitions: df-bi 195 df-or 383 df-an 384 df-3an 1032 df-tru 1477 df-ex 1695 df-nf 1700 df-sb 1867 df-eu 2461 df-mo 2462 df-clab 2596 df-cleq 2602 df-clel 2605 df-nfc 2739 df-ne 2781 df-ral 2900 df-rex 2901 df-reu 2902 df-rab 2904 df-v 3174 df-sbc 3402 df-csb 3499 df-dif 3542 df-un 3544 df-in 3546 df-ss 3553 df-nul 3874 df-if 4036 df-pw 4109 df-sn 4125 df-pr 4127 df-op 4131 df-uni 4367 df-iun 4451 df-br 4578 df-opab 4638 df-mpt 4639 df-id 4943 df-xp 5034 df-rel 5035 df-cnv 5036 df-co 5037 df-dm 5038 df-rn 5039 df-res 5040 df-ima 5041 df-iota 5754 df-fun 5792 df-fn 5793 df-f 5794 df-f1 5795 df-fo 5796 df-f1o 5797 df-fv 5798 df-riota 6489 df-ov 6530 df-oprab 6531 df-preset 16697 df-poset 16715 df-plt 16727 df-lub 16743 df-glb 16744 df-join 16745 df-meet 16746 df-p0 16808 df-lat 16815 df-clat 16877 df-oposet 33277 df-ol 33279 df-oml 33280 df-covers 33367 df-ats 33368 df-atl 33399 df-cvlat 33423 df-hlat 33452 df-llines 33598 df-lplanes 33599

This theorem is referenced by: dalem13 33776

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