ps-2 - Mathbox for Norm Megill

	Mathbox for Norm Megill		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > Mathboxes > ps-2		Structured version Visualization version GIF version

Theorem ps-2 37419

Description: Lattice analogue for the projective geometry axiom, "if a line intersects two sides of a triangle at different points then it also intersects the third side." Projective space condition PS2 in [MaedaMaeda] p. 68 and part of Theorem 16.4 in [MaedaMaeda] p. 69. (Contributed by NM, 1-Dec-2011.)

**Hypotheses**
Ref	Expression
ps1.l	⊢ ≤ = (le‘𝐾)
ps1.j	⊢ ∨ = (join‘𝐾)
ps1.a	⊢ 𝐴 = (Atoms‘𝐾)

**Assertion**
Ref	Expression
ps-2	⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ ((¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ 𝑆 ≠ 𝑇) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇)))

Distinct variable groups: 𝑢,𝐴 𝑢, ∨ 𝑢,𝐾 𝑢, ≤ 𝑢,𝑃 𝑢,𝑄 𝑢,𝑅 𝑢,𝑆 𝑢,𝑇

**Proof of Theorem ps-2**
Step	Hyp	Ref	Expression
1		simpl21 1249	. . . . 5 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 = 𝑃) → 𝑃 ∈ 𝐴)
2		simp1 1134	. . . . . . 7 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝐾 ∈ HL)
3		simp21 1204	. . . . . . 7 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑃 ∈ 𝐴)
4		simp23 1206	. . . . . . 7 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑅 ∈ 𝐴)
5		ps1.l	. . . . . . . 8 ⊢ ≤ = (le‘𝐾)
6		ps1.j	. . . . . . . 8 ⊢ ∨ = (join‘𝐾)
7		ps1.a	. . . . . . . 8 ⊢ 𝐴 = (Atoms‘𝐾)
8	5, 6, 7	hlatlej1 37316	. . . . . . 7 ⊢ ((𝐾 ∈ HL ∧ 𝑃 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) → 𝑃 ≤ (𝑃 ∨ 𝑅))
9	2, 3, 4, 8	syl3anc 1369	. . . . . 6 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑃 ≤ (𝑃 ∨ 𝑅))
10	9	adantr 480	. . . . 5 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 = 𝑃) → 𝑃 ≤ (𝑃 ∨ 𝑅))
11		simp3r 1200	. . . . . . . 8 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑇 ∈ 𝐴)
12	5, 6, 7	hlatlej1 37316	. . . . . . . 8 ⊢ ((𝐾 ∈ HL ∧ 𝑃 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴) → 𝑃 ≤ (𝑃 ∨ 𝑇))
13	2, 3, 11, 12	syl3anc 1369	. . . . . . 7 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑃 ≤ (𝑃 ∨ 𝑇))
14		oveq1 7262	. . . . . . . 8 ⊢ (𝑆 = 𝑃 → (𝑆 ∨ 𝑇) = (𝑃 ∨ 𝑇))
15	14	breq2d 5082	. . . . . . 7 ⊢ (𝑆 = 𝑃 → (𝑃 ≤ (𝑆 ∨ 𝑇) ↔ 𝑃 ≤ (𝑃 ∨ 𝑇)))
16	13, 15	syl5ibrcom 246	. . . . . 6 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (𝑆 = 𝑃 → 𝑃 ≤ (𝑆 ∨ 𝑇)))
17	16	imp 406	. . . . 5 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 = 𝑃) → 𝑃 ≤ (𝑆 ∨ 𝑇))
18		breq1 5073	. . . . . . 7 ⊢ (𝑢 = 𝑃 → (𝑢 ≤ (𝑃 ∨ 𝑅) ↔ 𝑃 ≤ (𝑃 ∨ 𝑅)))
19		breq1 5073	. . . . . . 7 ⊢ (𝑢 = 𝑃 → (𝑢 ≤ (𝑆 ∨ 𝑇) ↔ 𝑃 ≤ (𝑆 ∨ 𝑇)))
20	18, 19	anbi12d 630	. . . . . 6 ⊢ (𝑢 = 𝑃 → ((𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇)) ↔ (𝑃 ≤ (𝑃 ∨ 𝑅) ∧ 𝑃 ≤ (𝑆 ∨ 𝑇))))
21	20	rspcev 3552	. . . . 5 ⊢ ((𝑃 ∈ 𝐴 ∧ (𝑃 ≤ (𝑃 ∨ 𝑅) ∧ 𝑃 ≤ (𝑆 ∨ 𝑇))) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇)))
22	1, 10, 17, 21	syl12anc 833	. . . 4 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 = 𝑃) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇)))
23	22	a1d 25	. . 3 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 = 𝑃) → (((¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ 𝑆 ≠ 𝑇) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅))) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇))))
24		hlop 37303	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐾 ∈ HL → 𝐾 ∈ OP)
25	24	3ad2ant1 1131	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝐾 ∈ OP)
26		eqid 2738	. . . . . . . . . . . . . . . . . 18 ⊢ (Base‘𝐾) = (Base‘𝐾)
27		eqid 2738	. . . . . . . . . . . . . . . . . 18 ⊢ (0.‘𝐾) = (0.‘𝐾)
28	26, 27	op0cl 37125	. . . . . . . . . . . . . . . . 17 ⊢ (𝐾 ∈ OP → (0.‘𝐾) ∈ (Base‘𝐾))
29	25, 28	syl 17	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (0.‘𝐾) ∈ (Base‘𝐾))
30	26, 7	atbase 37230	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ∈ 𝐴 → 𝑃 ∈ (Base‘𝐾))
31	3, 30	syl 17	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑃 ∈ (Base‘𝐾))
32		eqid 2738	. . . . . . . . . . . . . . . . . 18 ⊢ ( ⋖ ‘𝐾) = ( ⋖ ‘𝐾)
33	27, 32, 7	atcvr0 37229	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ 𝑃 ∈ 𝐴) → (0.‘𝐾)( ⋖ ‘𝐾)𝑃)
34	2, 3, 33	syl2anc 583	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (0.‘𝐾)( ⋖ ‘𝐾)𝑃)
35		eqid 2738	. . . . . . . . . . . . . . . . 17 ⊢ (lt‘𝐾) = (lt‘𝐾)
36	26, 35, 32	cvrlt 37211	. . . . . . . . . . . . . . . 16 ⊢ (((𝐾 ∈ HL ∧ (0.‘𝐾) ∈ (Base‘𝐾) ∧ 𝑃 ∈ (Base‘𝐾)) ∧ (0.‘𝐾)( ⋖ ‘𝐾)𝑃) → (0.‘𝐾)(lt‘𝐾)𝑃)
37	2, 29, 31, 34, 36	syl31anc 1371	. . . . . . . . . . . . . . 15 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (0.‘𝐾)(lt‘𝐾)𝑃)
38		hlpos 37307	. . . . . . . . . . . . . . . . 17 ⊢ (𝐾 ∈ HL → 𝐾 ∈ Poset)
39	38	3ad2ant1 1131	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝐾 ∈ Poset)
40		hllat 37304	. . . . . . . . . . . . . . . . . 18 ⊢ (𝐾 ∈ HL → 𝐾 ∈ Lat)
41	40	3ad2ant1 1131	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝐾 ∈ Lat)
42	26, 7	atbase 37230	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑅 ∈ 𝐴 → 𝑅 ∈ (Base‘𝐾))
43	4, 42	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑅 ∈ (Base‘𝐾))
44	26, 6	latjcl 18072	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ Lat ∧ 𝑃 ∈ (Base‘𝐾) ∧ 𝑅 ∈ (Base‘𝐾)) → (𝑃 ∨ 𝑅) ∈ (Base‘𝐾))
45	41, 31, 43, 44	syl3anc 1369	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (𝑃 ∨ 𝑅) ∈ (Base‘𝐾))
46	26, 5, 35	pltletr 17976	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ Poset ∧ ((0.‘𝐾) ∈ (Base‘𝐾) ∧ 𝑃 ∈ (Base‘𝐾) ∧ (𝑃 ∨ 𝑅) ∈ (Base‘𝐾))) → (((0.‘𝐾)(lt‘𝐾)𝑃 ∧ 𝑃 ≤ (𝑃 ∨ 𝑅)) → (0.‘𝐾)(lt‘𝐾)(𝑃 ∨ 𝑅)))
47	39, 29, 31, 45, 46	syl13anc 1370	. . . . . . . . . . . . . . 15 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (((0.‘𝐾)(lt‘𝐾)𝑃 ∧ 𝑃 ≤ (𝑃 ∨ 𝑅)) → (0.‘𝐾)(lt‘𝐾)(𝑃 ∨ 𝑅)))
48	37, 9, 47	mp2and 695	. . . . . . . . . . . . . 14 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (0.‘𝐾)(lt‘𝐾)(𝑃 ∨ 𝑅))
49	35	pltne 17967	. . . . . . . . . . . . . . 15 ⊢ ((𝐾 ∈ HL ∧ (0.‘𝐾) ∈ (Base‘𝐾) ∧ (𝑃 ∨ 𝑅) ∈ (Base‘𝐾)) → ((0.‘𝐾)(lt‘𝐾)(𝑃 ∨ 𝑅) → (0.‘𝐾) ≠ (𝑃 ∨ 𝑅)))
50	2, 29, 45, 49	syl3anc 1369	. . . . . . . . . . . . . 14 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → ((0.‘𝐾)(lt‘𝐾)(𝑃 ∨ 𝑅) → (0.‘𝐾) ≠ (𝑃 ∨ 𝑅)))
51	48, 50	mpd 15	. . . . . . . . . . . . 13 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (0.‘𝐾) ≠ (𝑃 ∨ 𝑅))
52	51	necomd 2998	. . . . . . . . . . . 12 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (𝑃 ∨ 𝑅) ≠ (0.‘𝐾))
53	52	adantr 480	. . . . . . . . . . 11 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → (𝑃 ∨ 𝑅) ≠ (0.‘𝐾))
54		hlatl 37301	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝐾 ∈ HL → 𝐾 ∈ AtLat)
55	54	3ad2ant1 1131	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝐾 ∈ AtLat)
56		simp3l 1199	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑆 ∈ 𝐴)
57	5, 7	atncmp 37253	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐾 ∈ AtLat ∧ 𝑆 ∈ 𝐴 ∧ 𝑃 ∈ 𝐴) → (¬ 𝑆 ≤ 𝑃 ↔ 𝑆 ≠ 𝑃))
58	55, 56, 3, 57	syl3anc 1369	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (¬ 𝑆 ≤ 𝑃 ↔ 𝑆 ≠ 𝑃))
59		simp22 1205	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑄 ∈ 𝐴)
60	26, 5, 6, 7	hlexch1 37323	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐾 ∈ HL ∧ (𝑆 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑃 ∈ (Base‘𝐾)) ∧ ¬ 𝑆 ≤ 𝑃) → (𝑆 ≤ (𝑃 ∨ 𝑄) → 𝑄 ≤ (𝑃 ∨ 𝑆)))
61	60	3expia 1119	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐾 ∈ HL ∧ (𝑆 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑃 ∈ (Base‘𝐾))) → (¬ 𝑆 ≤ 𝑃 → (𝑆 ≤ (𝑃 ∨ 𝑄) → 𝑄 ≤ (𝑃 ∨ 𝑆))))
62	2, 56, 59, 31, 61	syl13anc 1370	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (¬ 𝑆 ≤ 𝑃 → (𝑆 ≤ (𝑃 ∨ 𝑄) → 𝑄 ≤ (𝑃 ∨ 𝑆))))
63	58, 62	sylbird 259	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (𝑆 ≠ 𝑃 → (𝑆 ≤ (𝑃 ∨ 𝑄) → 𝑄 ≤ (𝑃 ∨ 𝑆))))
64	63	imp32 418	. . . . . . . . . . . . . . 15 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ 𝑆 ≤ (𝑃 ∨ 𝑄))) → 𝑄 ≤ (𝑃 ∨ 𝑆))
65	26, 7	atbase 37230	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑄 ∈ 𝐴 → 𝑄 ∈ (Base‘𝐾))
66	59, 65	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑄 ∈ (Base‘𝐾))
67	26, 7	atbase 37230	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑆 ∈ 𝐴 → 𝑆 ∈ (Base‘𝐾))
68	56, 67	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑆 ∈ (Base‘𝐾))
69	26, 6	latjcl 18072	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐾 ∈ Lat ∧ 𝑃 ∈ (Base‘𝐾) ∧ 𝑆 ∈ (Base‘𝐾)) → (𝑃 ∨ 𝑆) ∈ (Base‘𝐾))
70	41, 31, 68, 69	syl3anc 1369	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (𝑃 ∨ 𝑆) ∈ (Base‘𝐾))
71	26, 5, 6	latjlej1 18086	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ Lat ∧ (𝑄 ∈ (Base‘𝐾) ∧ (𝑃 ∨ 𝑆) ∈ (Base‘𝐾) ∧ 𝑅 ∈ (Base‘𝐾))) → (𝑄 ≤ (𝑃 ∨ 𝑆) → (𝑄 ∨ 𝑅) ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅)))
72	41, 66, 70, 43, 71	syl13anc 1370	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (𝑄 ≤ (𝑃 ∨ 𝑆) → (𝑄 ∨ 𝑅) ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅)))
73	72	adantr 480	. . . . . . . . . . . . . . 15 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ 𝑆 ≤ (𝑃 ∨ 𝑄))) → (𝑄 ≤ (𝑃 ∨ 𝑆) → (𝑄 ∨ 𝑅) ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅)))
74	64, 73	mpd 15	. . . . . . . . . . . . . 14 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ 𝑆 ≤ (𝑃 ∨ 𝑄))) → (𝑄 ∨ 𝑅) ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅))
75	74	adantrrr 721	. . . . . . . . . . . . 13 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → (𝑄 ∨ 𝑅) ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅))
76	26, 7	atbase 37230	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑇 ∈ 𝐴 → 𝑇 ∈ (Base‘𝐾))
77	11, 76	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → 𝑇 ∈ (Base‘𝐾))
78	26, 6	latjcl 18072	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐾 ∈ Lat ∧ 𝑄 ∈ (Base‘𝐾) ∧ 𝑅 ∈ (Base‘𝐾)) → (𝑄 ∨ 𝑅) ∈ (Base‘𝐾))
79	41, 66, 43, 78	syl3anc 1369	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (𝑄 ∨ 𝑅) ∈ (Base‘𝐾))
80	26, 6	latjcl 18072	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐾 ∈ Lat ∧ (𝑃 ∨ 𝑆) ∈ (Base‘𝐾) ∧ 𝑅 ∈ (Base‘𝐾)) → ((𝑃 ∨ 𝑆) ∨ 𝑅) ∈ (Base‘𝐾))
81	41, 70, 43, 80	syl3anc 1369	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → ((𝑃 ∨ 𝑆) ∨ 𝑅) ∈ (Base‘𝐾))
82	26, 5	lattr 18077	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐾 ∈ Lat ∧ (𝑇 ∈ (Base‘𝐾) ∧ (𝑄 ∨ 𝑅) ∈ (Base‘𝐾) ∧ ((𝑃 ∨ 𝑆) ∨ 𝑅) ∈ (Base‘𝐾))) → ((𝑇 ≤ (𝑄 ∨ 𝑅) ∧ (𝑄 ∨ 𝑅) ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅)) → 𝑇 ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅)))
83	41, 77, 79, 81, 82	syl13anc 1370	. . . . . . . . . . . . . . . 16 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → ((𝑇 ≤ (𝑄 ∨ 𝑅) ∧ (𝑄 ∨ 𝑅) ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅)) → 𝑇 ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅)))
84	83	expdimp 452	. . . . . . . . . . . . . . 15 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)) → ((𝑄 ∨ 𝑅) ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅) → 𝑇 ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅)))
85	84	adantrl 712	. . . . . . . . . . . . . 14 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅))) → ((𝑄 ∨ 𝑅) ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅) → 𝑇 ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅)))
86	85	adantrl 712	. . . . . . . . . . . . 13 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → ((𝑄 ∨ 𝑅) ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅) → 𝑇 ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅)))
87	75, 86	mpd 15	. . . . . . . . . . . 12 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → 𝑇 ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅))
88	6, 7	hlatj32 37313	. . . . . . . . . . . . . . 15 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑆 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴)) → ((𝑃 ∨ 𝑆) ∨ 𝑅) = ((𝑃 ∨ 𝑅) ∨ 𝑆))
89	2, 3, 56, 4, 88	syl13anc 1370	. . . . . . . . . . . . . 14 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → ((𝑃 ∨ 𝑆) ∨ 𝑅) = ((𝑃 ∨ 𝑅) ∨ 𝑆))
90	89	breq2d 5082	. . . . . . . . . . . . 13 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (𝑇 ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅) ↔ 𝑇 ≤ ((𝑃 ∨ 𝑅) ∨ 𝑆)))
91	90	adantr 480	. . . . . . . . . . . 12 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → (𝑇 ≤ ((𝑃 ∨ 𝑆) ∨ 𝑅) ↔ 𝑇 ≤ ((𝑃 ∨ 𝑅) ∨ 𝑆)))
92	87, 91	mpbid 231	. . . . . . . . . . 11 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → 𝑇 ≤ ((𝑃 ∨ 𝑅) ∨ 𝑆))
93	53, 92	jca 511	. . . . . . . . . 10 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → ((𝑃 ∨ 𝑅) ≠ (0.‘𝐾) ∧ 𝑇 ≤ ((𝑃 ∨ 𝑅) ∨ 𝑆)))
94	93	adantrrl 720	. . . . . . . . 9 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ (𝑆 ≠ 𝑃 ∧ (¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅))))) → ((𝑃 ∨ 𝑅) ≠ (0.‘𝐾) ∧ 𝑇 ≤ ((𝑃 ∨ 𝑅) ∨ 𝑆)))
95	94	ex 412	. . . . . . . 8 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → ((𝑆 ≠ 𝑃 ∧ (¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → ((𝑃 ∨ 𝑅) ≠ (0.‘𝐾) ∧ 𝑇 ≤ ((𝑃 ∨ 𝑅) ∨ 𝑆))))
96	26, 5, 6, 27, 7	cvrat4 37384	. . . . . . . . 9 ⊢ ((𝐾 ∈ HL ∧ ((𝑃 ∨ 𝑅) ∈ (Base‘𝐾) ∧ 𝑇 ∈ 𝐴 ∧ 𝑆 ∈ 𝐴)) → (((𝑃 ∨ 𝑅) ≠ (0.‘𝐾) ∧ 𝑇 ≤ ((𝑃 ∨ 𝑅) ∨ 𝑆)) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑇 ≤ (𝑆 ∨ 𝑢))))
97	2, 45, 11, 56, 96	syl13anc 1370	. . . . . . . 8 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (((𝑃 ∨ 𝑅) ≠ (0.‘𝐾) ∧ 𝑇 ≤ ((𝑃 ∨ 𝑅) ∨ 𝑆)) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑇 ≤ (𝑆 ∨ 𝑢))))
98	95, 97	syld 47	. . . . . . 7 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → ((𝑆 ≠ 𝑃 ∧ (¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑇 ≤ (𝑆 ∨ 𝑢))))
99	98	impl 455	. . . . . 6 ⊢ ((((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 ≠ 𝑃) ∧ (¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑇 ≤ (𝑆 ∨ 𝑢)))
100	99	adantrlr 719	. . . . 5 ⊢ ((((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 ≠ 𝑃) ∧ ((¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ 𝑆 ≠ 𝑇) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑇 ≤ (𝑆 ∨ 𝑢)))
101	5, 7	atncmp 37253	. . . . . . . . . . . . . . 15 ⊢ ((𝐾 ∈ AtLat ∧ 𝑇 ∈ 𝐴 ∧ 𝑆 ∈ 𝐴) → (¬ 𝑇 ≤ 𝑆 ↔ 𝑇 ≠ 𝑆))
102	55, 11, 56, 101	syl3anc 1369	. . . . . . . . . . . . . 14 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (¬ 𝑇 ≤ 𝑆 ↔ 𝑇 ≠ 𝑆))
103		necom 2996	. . . . . . . . . . . . . 14 ⊢ (𝑇 ≠ 𝑆 ↔ 𝑆 ≠ 𝑇)
104	102, 103	bitrdi 286	. . . . . . . . . . . . 13 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (¬ 𝑇 ≤ 𝑆 ↔ 𝑆 ≠ 𝑇))
105	104	adantr 480	. . . . . . . . . . . 12 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑢 ∈ 𝐴) → (¬ 𝑇 ≤ 𝑆 ↔ 𝑆 ≠ 𝑇))
106		simpl1 1189	. . . . . . . . . . . . 13 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑢 ∈ 𝐴) → 𝐾 ∈ HL)
107		simpl3r 1227	. . . . . . . . . . . . 13 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑢 ∈ 𝐴) → 𝑇 ∈ 𝐴)
108		simpr 484	. . . . . . . . . . . . 13 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑢 ∈ 𝐴) → 𝑢 ∈ 𝐴)
109	68	adantr 480	. . . . . . . . . . . . 13 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑢 ∈ 𝐴) → 𝑆 ∈ (Base‘𝐾))
110	26, 5, 6, 7	hlexch1 37323	. . . . . . . . . . . . . 14 ⊢ ((𝐾 ∈ HL ∧ (𝑇 ∈ 𝐴 ∧ 𝑢 ∈ 𝐴 ∧ 𝑆 ∈ (Base‘𝐾)) ∧ ¬ 𝑇 ≤ 𝑆) → (𝑇 ≤ (𝑆 ∨ 𝑢) → 𝑢 ≤ (𝑆 ∨ 𝑇)))
111	110	3expia 1119	. . . . . . . . . . . . 13 ⊢ ((𝐾 ∈ HL ∧ (𝑇 ∈ 𝐴 ∧ 𝑢 ∈ 𝐴 ∧ 𝑆 ∈ (Base‘𝐾))) → (¬ 𝑇 ≤ 𝑆 → (𝑇 ≤ (𝑆 ∨ 𝑢) → 𝑢 ≤ (𝑆 ∨ 𝑇))))
112	106, 107, 108, 109, 111	syl13anc 1370	. . . . . . . . . . . 12 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑢 ∈ 𝐴) → (¬ 𝑇 ≤ 𝑆 → (𝑇 ≤ (𝑆 ∨ 𝑢) → 𝑢 ≤ (𝑆 ∨ 𝑇))))
113	105, 112	sylbird 259	. . . . . . . . . . 11 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑢 ∈ 𝐴) → (𝑆 ≠ 𝑇 → (𝑇 ≤ (𝑆 ∨ 𝑢) → 𝑢 ≤ (𝑆 ∨ 𝑇))))
114	113	imp 406	. . . . . . . . . 10 ⊢ ((((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑢 ∈ 𝐴) ∧ 𝑆 ≠ 𝑇) → (𝑇 ≤ (𝑆 ∨ 𝑢) → 𝑢 ≤ (𝑆 ∨ 𝑇)))
115	114	an32s 648	. . . . . . . . 9 ⊢ ((((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 ≠ 𝑇) ∧ 𝑢 ∈ 𝐴) → (𝑇 ≤ (𝑆 ∨ 𝑢) → 𝑢 ≤ (𝑆 ∨ 𝑇)))
116	115	anim2d 611	. . . . . . . 8 ⊢ ((((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 ≠ 𝑇) ∧ 𝑢 ∈ 𝐴) → ((𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑇 ≤ (𝑆 ∨ 𝑢)) → (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇))))
117	116	reximdva 3202	. . . . . . 7 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 ≠ 𝑇) → (∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑇 ≤ (𝑆 ∨ 𝑢)) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇))))
118	117	ad2ant2rl 745	. . . . . 6 ⊢ ((((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 ≠ 𝑃) ∧ (¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ 𝑆 ≠ 𝑇)) → (∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑇 ≤ (𝑆 ∨ 𝑢)) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇))))
119	118	adantrr 713	. . . . 5 ⊢ ((((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 ≠ 𝑃) ∧ ((¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ 𝑆 ≠ 𝑇) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → (∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑇 ≤ (𝑆 ∨ 𝑢)) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇))))
120	100, 119	mpd 15	. . . 4 ⊢ ((((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 ≠ 𝑃) ∧ ((¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ 𝑆 ≠ 𝑇) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇)))
121	120	ex 412	. . 3 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ 𝑆 ≠ 𝑃) → (((¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ 𝑆 ≠ 𝑇) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅))) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇))))
122	23, 121	pm2.61dane 3031	. 2 ⊢ ((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) → (((¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ 𝑆 ≠ 𝑇) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅))) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇))))
123	122	imp 406	1 ⊢ (((𝐾 ∈ HL ∧ (𝑃 ∈ 𝐴 ∧ 𝑄 ∈ 𝐴 ∧ 𝑅 ∈ 𝐴) ∧ (𝑆 ∈ 𝐴 ∧ 𝑇 ∈ 𝐴)) ∧ ((¬ 𝑃 ≤ (𝑄 ∨ 𝑅) ∧ 𝑆 ≠ 𝑇) ∧ (𝑆 ≤ (𝑃 ∨ 𝑄) ∧ 𝑇 ≤ (𝑄 ∨ 𝑅)))) → ∃𝑢 ∈ 𝐴 (𝑢 ≤ (𝑃 ∨ 𝑅) ∧ 𝑢 ≤ (𝑆 ∨ 𝑇)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 ∃wrex 3064 class class class wbr 5070 ‘cfv 6418 (class class class)co 7255 Basecbs 16840 lecple 16895 Posetcpo 17940 ltcplt 17941 joincjn 17944 0.cp0 18056 Latclat 18064 OPcops 37113 ⋖ ccvr 37203 Atomscatm 37204 AtLatcal 37205 HLchlt 37291

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566

This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-proset 17928 df-poset 17946 df-plt 17963 df-lub 17979 df-glb 17980 df-join 17981 df-meet 17982 df-p0 18058 df-lat 18065 df-clat 18132 df-oposet 37117 df-ol 37119 df-oml 37120 df-covers 37207 df-ats 37208 df-atl 37239 df-cvlat 37263 df-hlat 37292

This theorem is referenced by: ps-2b 37423 paddasslem3 37763

W3C validator