Theorem dalem10 34959

Description: Lemma for dath 35022. Atom 𝐷 belongs to the axis of perspectivity 𝑋. (Contributed by NM, 19-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)
dalem10.m	⊢ ∧ = (meet‘𝐾)
dalem10.o	⊢ 𝑂 = (LPlanes‘𝐾)
dalem10.y	⊢ 𝑌 = ((𝑃 ∨ 𝑄) ∨ 𝑅)
dalem10.z	⊢ 𝑍 = ((𝑆 ∨ 𝑇) ∨ 𝑈)
dalem10.x	⊢ 𝑋 = (𝑌 ∧ 𝑍)
dalem10.d	⊢ 𝐷 = ((𝑃 ∨ 𝑄) ∧ (𝑆 ∨ 𝑇))

Assertion

Ref	Expression
dalem10	⊢ (𝜑 → 𝐷 ≤ 𝑋)

Proof of Theorem dalem10

Step	Hyp	Ref	Expression
1		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)))))
2	1	dalemkelat 34910	. . . 4 ⊢ (𝜑 → 𝐾 ∈ Lat)
3		dalemc.j	. . . . 5 ⊢ ∨ = (join‘𝐾)
4		dalemc.a	. . . . 5 ⊢ 𝐴 = (Atoms‘𝐾)
5	1, 3, 4	dalempjqeb 34931	. . . 4 ⊢ (𝜑 → (𝑃 ∨ 𝑄) ∈ (Base‘𝐾))
6	1, 4	dalemreb 34927	. . . 4 ⊢ (𝜑 → 𝑅 ∈ (Base‘𝐾))
7		eqid 2622	. . . . 5 ⊢ (Base‘𝐾) = (Base‘𝐾)
8		dalemc.l	. . . . 5 ⊢ ≤ = (le‘𝐾)
9	7, 8, 3	latlej1 17060	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ (𝑃 ∨ 𝑄) ∈ (Base‘𝐾) ∧ 𝑅 ∈ (Base‘𝐾)) → (𝑃 ∨ 𝑄) ≤ ((𝑃 ∨ 𝑄) ∨ 𝑅))
10	2, 5, 6, 9	syl3anc 1326	. . 3 ⊢ (𝜑 → (𝑃 ∨ 𝑄) ≤ ((𝑃 ∨ 𝑄) ∨ 𝑅))
11	1, 3, 4	dalemsjteb 34932	. . . 4 ⊢ (𝜑 → (𝑆 ∨ 𝑇) ∈ (Base‘𝐾))
12	1, 4	dalemueb 34930	. . . 4 ⊢ (𝜑 → 𝑈 ∈ (Base‘𝐾))
13	7, 8, 3	latlej1 17060	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ (𝑆 ∨ 𝑇) ∈ (Base‘𝐾) ∧ 𝑈 ∈ (Base‘𝐾)) → (𝑆 ∨ 𝑇) ≤ ((𝑆 ∨ 𝑇) ∨ 𝑈))
14	2, 11, 12, 13	syl3anc 1326	. . 3 ⊢ (𝜑 → (𝑆 ∨ 𝑇) ≤ ((𝑆 ∨ 𝑇) ∨ 𝑈))
15		dalem10.y	. . . . 5 ⊢ 𝑌 = ((𝑃 ∨ 𝑄) ∨ 𝑅)
16		dalem10.o	. . . . . 6 ⊢ 𝑂 = (LPlanes‘𝐾)
17	1, 16	dalemyeb 34935	. . . . 5 ⊢ (𝜑 → 𝑌 ∈ (Base‘𝐾))
18	15, 17	syl5eqelr 2706	. . . 4 ⊢ (𝜑 → ((𝑃 ∨ 𝑄) ∨ 𝑅) ∈ (Base‘𝐾))
19		dalem10.z	. . . . 5 ⊢ 𝑍 = ((𝑆 ∨ 𝑇) ∨ 𝑈)
20	1	dalemzeo 34919	. . . . . 6 ⊢ (𝜑 → 𝑍 ∈ 𝑂)
21	7, 16	lplnbase 34820	. . . . . 6 ⊢ (𝑍 ∈ 𝑂 → 𝑍 ∈ (Base‘𝐾))
22	20, 21	syl 17	. . . . 5 ⊢ (𝜑 → 𝑍 ∈ (Base‘𝐾))
23	19, 22	syl5eqelr 2706	. . . 4 ⊢ (𝜑 → ((𝑆 ∨ 𝑇) ∨ 𝑈) ∈ (Base‘𝐾))
24		dalem10.m	. . . . 5 ⊢ ∧ = (meet‘𝐾)
25	7, 8, 24	latmlem12 17083	. . . 4 ⊢ ((𝐾 ∈ Lat ∧ ((𝑃 ∨ 𝑄) ∈ (Base‘𝐾) ∧ ((𝑃 ∨ 𝑄) ∨ 𝑅) ∈ (Base‘𝐾)) ∧ ((𝑆 ∨ 𝑇) ∈ (Base‘𝐾) ∧ ((𝑆 ∨ 𝑇) ∨ 𝑈) ∈ (Base‘𝐾))) → (((𝑃 ∨ 𝑄) ≤ ((𝑃 ∨ 𝑄) ∨ 𝑅) ∧ (𝑆 ∨ 𝑇) ≤ ((𝑆 ∨ 𝑇) ∨ 𝑈)) → ((𝑃 ∨ 𝑄) ∧ (𝑆 ∨ 𝑇)) ≤ (((𝑃 ∨ 𝑄) ∨ 𝑅) ∧ ((𝑆 ∨ 𝑇) ∨ 𝑈))))
26	2, 5, 18, 11, 23, 25	syl122anc 1335	. . 3 ⊢ (𝜑 → (((𝑃 ∨ 𝑄) ≤ ((𝑃 ∨ 𝑄) ∨ 𝑅) ∧ (𝑆 ∨ 𝑇) ≤ ((𝑆 ∨ 𝑇) ∨ 𝑈)) → ((𝑃 ∨ 𝑄) ∧ (𝑆 ∨ 𝑇)) ≤ (((𝑃 ∨ 𝑄) ∨ 𝑅) ∧ ((𝑆 ∨ 𝑇) ∨ 𝑈))))
27	10, 14, 26	mp2and 715	. 2 ⊢ (𝜑 → ((𝑃 ∨ 𝑄) ∧ (𝑆 ∨ 𝑇)) ≤ (((𝑃 ∨ 𝑄) ∨ 𝑅) ∧ ((𝑆 ∨ 𝑇) ∨ 𝑈)))
28		dalem10.d	. 2 ⊢ 𝐷 = ((𝑃 ∨ 𝑄) ∧ (𝑆 ∨ 𝑇))
29		dalem10.x	. . 3 ⊢ 𝑋 = (𝑌 ∧ 𝑍)
30	15, 19	oveq12i 6662	. . 3 ⊢ (𝑌 ∧ 𝑍) = (((𝑃 ∨ 𝑄) ∨ 𝑅) ∧ ((𝑆 ∨ 𝑇) ∨ 𝑈))
31	29, 30	eqtri 2644	. 2 ⊢ 𝑋 = (((𝑃 ∨ 𝑄) ∨ 𝑅) ∧ ((𝑆 ∨ 𝑇) ∨ 𝑈))
32	27, 28, 31	3brtr4g 4687	1 ⊢ (𝜑 → 𝐷 ≤ 𝑋)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 196   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990   class class class wbr 4653  ‘cfv 5888  (class class class)co 6650  Basecbs 15857  lecple 15948  joincjn 16944  meetcmee 16945  Latclat 17045  Atomscatm 34550  HLchlt 34637  LPlanesclpl 34778

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-poset 16946  df-lub 16974  df-glb 16975  df-join 16976  df-meet 16977  df-lat 17046  df-ats 34554  df-atl 34585  df-cvlat 34609  df-hlat 34638  df-lplanes 34785

This theorem is referenced by:  dalem11  34960  dalem16  34965  dalem54  35012