Theorem dalem25 39692

Description: Lemma for dath 39730. Show that the dummy center of perspectivity 𝑐 is different from auxiliary atom 𝐺. (Contributed by NM, 3-Aug-2012.)

Hypotheses

Ref	Expression
dalem.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)))))
dalem.l	⊢ ≤ = (le‘𝐾)
dalem.j	⊢ ∨ = (join‘𝐾)
dalem.a	⊢ 𝐴 = (Atoms‘𝐾)
dalem.ps	⊢ (𝜓 ↔ ((𝑐 ∈ 𝐴 ∧ 𝑑 ∈ 𝐴) ∧ ¬ 𝑐 ≤ 𝑌 ∧ (𝑑 ≠ 𝑐 ∧ ¬ 𝑑 ≤ 𝑌 ∧ 𝐶 ≤ (𝑐 ∨ 𝑑))))
dalem23.m	⊢ ∧ = (meet‘𝐾)
dalem23.o	⊢ 𝑂 = (LPlanes‘𝐾)
dalem23.y	⊢ 𝑌 = ((𝑃 ∨ 𝑄) ∨ 𝑅)
dalem23.z	⊢ 𝑍 = ((𝑆 ∨ 𝑇) ∨ 𝑈)
dalem23.g	⊢ 𝐺 = ((𝑐 ∨ 𝑃) ∧ (𝑑 ∨ 𝑆))

Assertion

Ref	Expression
dalem25	⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑐 ≠ 𝐺)

Proof of Theorem dalem25

Step	Hyp	Ref	Expression
1		dalem.ph	. . . 4 ⊢ (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		dalem.l	. . . 4 ⊢ ≤ = (le‘𝐾)
3		dalem.j	. . . 4 ⊢ ∨ = (join‘𝐾)
4		dalem.a	. . . 4 ⊢ 𝐴 = (Atoms‘𝐾)
5	1, 2, 3, 4	dalemcnes 39644	. . 3 ⊢ (𝜑 → 𝐶 ≠ 𝑆)
6	5	3ad2ant1 1133	. 2 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝐶 ≠ 𝑆)
7		dalem.ps	. . . . . . . . . . 11 ⊢ (𝜓 ↔ ((𝑐 ∈ 𝐴 ∧ 𝑑 ∈ 𝐴) ∧ ¬ 𝑐 ≤ 𝑌 ∧ (𝑑 ≠ 𝑐 ∧ ¬ 𝑑 ≤ 𝑌 ∧ 𝐶 ≤ (𝑐 ∨ 𝑑))))
8	7	dalemclccjdd 39682	. . . . . . . . . 10 ⊢ (𝜓 → 𝐶 ≤ (𝑐 ∨ 𝑑))
9	8	3ad2ant3 1135	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝐶 ≤ (𝑐 ∨ 𝑑))
10	9	adantr 480	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → 𝐶 ≤ (𝑐 ∨ 𝑑))
11		simpr 484	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → 𝑐 = 𝐺)
12		dalem23.g	. . . . . . . . . . . . 13 ⊢ 𝐺 = ((𝑐 ∨ 𝑃) ∧ (𝑑 ∨ 𝑆))
13	1	dalemkelat 39618	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝐾 ∈ Lat)
14	13	3ad2ant1 1133	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝐾 ∈ Lat)
15	1	dalemkehl 39617	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝐾 ∈ HL)
16	15	3ad2ant1 1133	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝐾 ∈ HL)
17	7	dalemccea 39677	. . . . . . . . . . . . . . . 16 ⊢ (𝜓 → 𝑐 ∈ 𝐴)
18	17	3ad2ant3 1135	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑐 ∈ 𝐴)
19	1	dalempea 39620	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑃 ∈ 𝐴)
20	19	3ad2ant1 1133	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑃 ∈ 𝐴)
21		eqid 2729	. . . . . . . . . . . . . . . 16 ⊢ (Base‘𝐾) = (Base‘𝐾)
22	21, 3, 4	hlatjcl 39360	. . . . . . . . . . . . . . 15 ⊢ ((𝐾 ∈ HL ∧ 𝑐 ∈ 𝐴 ∧ 𝑃 ∈ 𝐴) → (𝑐 ∨ 𝑃) ∈ (Base‘𝐾))
23	16, 18, 20, 22	syl3anc 1373	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝑐 ∨ 𝑃) ∈ (Base‘𝐾))
24	7	dalemddea 39678	. . . . . . . . . . . . . . . 16 ⊢ (𝜓 → 𝑑 ∈ 𝐴)
25	24	3ad2ant3 1135	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑑 ∈ 𝐴)
26	1	dalemsea 39623	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑆 ∈ 𝐴)
27	26	3ad2ant1 1133	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑆 ∈ 𝐴)
28	21, 3, 4	hlatjcl 39360	. . . . . . . . . . . . . . 15 ⊢ ((𝐾 ∈ HL ∧ 𝑑 ∈ 𝐴 ∧ 𝑆 ∈ 𝐴) → (𝑑 ∨ 𝑆) ∈ (Base‘𝐾))
29	16, 25, 27, 28	syl3anc 1373	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝑑 ∨ 𝑆) ∈ (Base‘𝐾))
30		dalem23.m	. . . . . . . . . . . . . . 15 ⊢ ∧ = (meet‘𝐾)
31	21, 2, 30	latmle2 18424	. . . . . . . . . . . . . 14 ⊢ ((𝐾 ∈ Lat ∧ (𝑐 ∨ 𝑃) ∈ (Base‘𝐾) ∧ (𝑑 ∨ 𝑆) ∈ (Base‘𝐾)) → ((𝑐 ∨ 𝑃) ∧ (𝑑 ∨ 𝑆)) ≤ (𝑑 ∨ 𝑆))
32	14, 23, 29, 31	syl3anc 1373	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → ((𝑐 ∨ 𝑃) ∧ (𝑑 ∨ 𝑆)) ≤ (𝑑 ∨ 𝑆))
33	12, 32	eqbrtrid 5142	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝐺 ≤ (𝑑 ∨ 𝑆))
34	3, 4	hlatjcom 39361	. . . . . . . . . . . . 13 ⊢ ((𝐾 ∈ HL ∧ 𝑑 ∈ 𝐴 ∧ 𝑆 ∈ 𝐴) → (𝑑 ∨ 𝑆) = (𝑆 ∨ 𝑑))
35	16, 25, 27, 34	syl3anc 1373	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝑑 ∨ 𝑆) = (𝑆 ∨ 𝑑))
36	33, 35	breqtrd 5133	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝐺 ≤ (𝑆 ∨ 𝑑))
37	36	adantr 480	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → 𝐺 ≤ (𝑆 ∨ 𝑑))
38	11, 37	eqbrtrd 5129	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → 𝑐 ≤ (𝑆 ∨ 𝑑))
39	2, 3, 4	hlatlej2 39369	. . . . . . . . . . 11 ⊢ ((𝐾 ∈ HL ∧ 𝑆 ∈ 𝐴 ∧ 𝑑 ∈ 𝐴) → 𝑑 ≤ (𝑆 ∨ 𝑑))
40	16, 27, 25, 39	syl3anc 1373	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑑 ≤ (𝑆 ∨ 𝑑))
41	40	adantr 480	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → 𝑑 ≤ (𝑆 ∨ 𝑑))
42	7, 4	dalemcceb 39683	. . . . . . . . . . . 12 ⊢ (𝜓 → 𝑐 ∈ (Base‘𝐾))
43	42	3ad2ant3 1135	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑐 ∈ (Base‘𝐾))
44	21, 4	atbase 39282	. . . . . . . . . . . . 13 ⊢ (𝑑 ∈ 𝐴 → 𝑑 ∈ (Base‘𝐾))
45	24, 44	syl 17	. . . . . . . . . . . 12 ⊢ (𝜓 → 𝑑 ∈ (Base‘𝐾))
46	45	3ad2ant3 1135	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑑 ∈ (Base‘𝐾))
47	21, 3, 4	hlatjcl 39360	. . . . . . . . . . . 12 ⊢ ((𝐾 ∈ HL ∧ 𝑆 ∈ 𝐴 ∧ 𝑑 ∈ 𝐴) → (𝑆 ∨ 𝑑) ∈ (Base‘𝐾))
48	16, 27, 25, 47	syl3anc 1373	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝑆 ∨ 𝑑) ∈ (Base‘𝐾))
49	21, 2, 3	latjle12 18409	. . . . . . . . . . 11 ⊢ ((𝐾 ∈ Lat ∧ (𝑐 ∈ (Base‘𝐾) ∧ 𝑑 ∈ (Base‘𝐾) ∧ (𝑆 ∨ 𝑑) ∈ (Base‘𝐾))) → ((𝑐 ≤ (𝑆 ∨ 𝑑) ∧ 𝑑 ≤ (𝑆 ∨ 𝑑)) ↔ (𝑐 ∨ 𝑑) ≤ (𝑆 ∨ 𝑑)))
50	14, 43, 46, 48, 49	syl13anc 1374	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → ((𝑐 ≤ (𝑆 ∨ 𝑑) ∧ 𝑑 ≤ (𝑆 ∨ 𝑑)) ↔ (𝑐 ∨ 𝑑) ≤ (𝑆 ∨ 𝑑)))
51	50	adantr 480	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → ((𝑐 ≤ (𝑆 ∨ 𝑑) ∧ 𝑑 ≤ (𝑆 ∨ 𝑑)) ↔ (𝑐 ∨ 𝑑) ≤ (𝑆 ∨ 𝑑)))
52	38, 41, 51	mpbi2and 712	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → (𝑐 ∨ 𝑑) ≤ (𝑆 ∨ 𝑑))
53	1, 4	dalemceb 39632	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐶 ∈ (Base‘𝐾))
54	53	3ad2ant1 1133	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝐶 ∈ (Base‘𝐾))
55	21, 3, 4	hlatjcl 39360	. . . . . . . . . . 11 ⊢ ((𝐾 ∈ HL ∧ 𝑐 ∈ 𝐴 ∧ 𝑑 ∈ 𝐴) → (𝑐 ∨ 𝑑) ∈ (Base‘𝐾))
56	16, 18, 25, 55	syl3anc 1373	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝑐 ∨ 𝑑) ∈ (Base‘𝐾))
57	21, 2	lattr 18403	. . . . . . . . . 10 ⊢ ((𝐾 ∈ Lat ∧ (𝐶 ∈ (Base‘𝐾) ∧ (𝑐 ∨ 𝑑) ∈ (Base‘𝐾) ∧ (𝑆 ∨ 𝑑) ∈ (Base‘𝐾))) → ((𝐶 ≤ (𝑐 ∨ 𝑑) ∧ (𝑐 ∨ 𝑑) ≤ (𝑆 ∨ 𝑑)) → 𝐶 ≤ (𝑆 ∨ 𝑑)))
58	14, 54, 56, 48, 57	syl13anc 1374	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → ((𝐶 ≤ (𝑐 ∨ 𝑑) ∧ (𝑐 ∨ 𝑑) ≤ (𝑆 ∨ 𝑑)) → 𝐶 ≤ (𝑆 ∨ 𝑑)))
59	58	adantr 480	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → ((𝐶 ≤ (𝑐 ∨ 𝑑) ∧ (𝑐 ∨ 𝑑) ≤ (𝑆 ∨ 𝑑)) → 𝐶 ≤ (𝑆 ∨ 𝑑)))
60	10, 52, 59	mp2and 699	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → 𝐶 ≤ (𝑆 ∨ 𝑑))
61		dalem23.o	. . . . . . . . . . 11 ⊢ 𝑂 = (LPlanes‘𝐾)
62	1, 61	dalemyeb 39643	. . . . . . . . . 10 ⊢ (𝜑 → 𝑌 ∈ (Base‘𝐾))
63	62	3ad2ant1 1133	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑌 ∈ (Base‘𝐾))
64	21, 2, 30	latmlem1 18428	. . . . . . . . 9 ⊢ ((𝐾 ∈ Lat ∧ (𝐶 ∈ (Base‘𝐾) ∧ (𝑆 ∨ 𝑑) ∈ (Base‘𝐾) ∧ 𝑌 ∈ (Base‘𝐾))) → (𝐶 ≤ (𝑆 ∨ 𝑑) → (𝐶 ∧ 𝑌) ≤ ((𝑆 ∨ 𝑑) ∧ 𝑌)))
65	14, 54, 48, 63, 64	syl13anc 1374	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝐶 ≤ (𝑆 ∨ 𝑑) → (𝐶 ∧ 𝑌) ≤ ((𝑆 ∨ 𝑑) ∧ 𝑌)))
66	65	adantr 480	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → (𝐶 ≤ (𝑆 ∨ 𝑑) → (𝐶 ∧ 𝑌) ≤ ((𝑆 ∨ 𝑑) ∧ 𝑌)))
67	60, 66	mpd 15	. . . . . 6 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → (𝐶 ∧ 𝑌) ≤ ((𝑆 ∨ 𝑑) ∧ 𝑌))
68		dalem23.y	. . . . . . . . . 10 ⊢ 𝑌 = ((𝑃 ∨ 𝑄) ∨ 𝑅)
69		dalem23.z	. . . . . . . . . 10 ⊢ 𝑍 = ((𝑆 ∨ 𝑇) ∨ 𝑈)
70	1, 2, 3, 4, 61, 68, 69	dalem17 39674	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑌 = 𝑍) → 𝐶 ≤ 𝑌)
71	70	3adant3 1132	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝐶 ≤ 𝑌)
72	21, 2, 30	latleeqm1 18426	. . . . . . . . 9 ⊢ ((𝐾 ∈ Lat ∧ 𝐶 ∈ (Base‘𝐾) ∧ 𝑌 ∈ (Base‘𝐾)) → (𝐶 ≤ 𝑌 ↔ (𝐶 ∧ 𝑌) = 𝐶))
73	14, 54, 63, 72	syl3anc 1373	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝐶 ≤ 𝑌 ↔ (𝐶 ∧ 𝑌) = 𝐶))
74	71, 73	mpbid 232	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝐶 ∧ 𝑌) = 𝐶)
75	74	adantr 480	. . . . . 6 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → (𝐶 ∧ 𝑌) = 𝐶)
76	1, 2, 3, 4, 69	dalemsly 39649	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑌 = 𝑍) → 𝑆 ≤ 𝑌)
77	76	3adant3 1132	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑆 ≤ 𝑌)
78	7	dalem-ddly 39680	. . . . . . . . 9 ⊢ (𝜓 → ¬ 𝑑 ≤ 𝑌)
79	78	3ad2ant3 1135	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → ¬ 𝑑 ≤ 𝑌)
80	21, 2, 3, 30, 4	2atjm 39439	. . . . . . . 8 ⊢ ((𝐾 ∈ HL ∧ (𝑆 ∈ 𝐴 ∧ 𝑑 ∈ 𝐴 ∧ 𝑌 ∈ (Base‘𝐾)) ∧ (𝑆 ≤ 𝑌 ∧ ¬ 𝑑 ≤ 𝑌)) → ((𝑆 ∨ 𝑑) ∧ 𝑌) = 𝑆)
81	16, 27, 25, 63, 77, 79, 80	syl132anc 1390	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → ((𝑆 ∨ 𝑑) ∧ 𝑌) = 𝑆)
82	81	adantr 480	. . . . . 6 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → ((𝑆 ∨ 𝑑) ∧ 𝑌) = 𝑆)
83	67, 75, 82	3brtr3d 5138	. . . . 5 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → 𝐶 ≤ 𝑆)
84		hlatl 39353	. . . . . . . . 9 ⊢ (𝐾 ∈ HL → 𝐾 ∈ AtLat)
85	15, 84	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝐾 ∈ AtLat)
86	1, 2, 3, 4, 61, 68	dalemcea 39654	. . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ 𝐴)
87	2, 4	atcmp 39304	. . . . . . . 8 ⊢ ((𝐾 ∈ AtLat ∧ 𝐶 ∈ 𝐴 ∧ 𝑆 ∈ 𝐴) → (𝐶 ≤ 𝑆 ↔ 𝐶 = 𝑆))
88	85, 86, 26, 87	syl3anc 1373	. . . . . . 7 ⊢ (𝜑 → (𝐶 ≤ 𝑆 ↔ 𝐶 = 𝑆))
89	88	3ad2ant1 1133	. . . . . 6 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝐶 ≤ 𝑆 ↔ 𝐶 = 𝑆))
90	89	adantr 480	. . . . 5 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → (𝐶 ≤ 𝑆 ↔ 𝐶 = 𝑆))
91	83, 90	mpbid 232	. . . 4 ⊢ (((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) ∧ 𝑐 = 𝐺) → 𝐶 = 𝑆)
92	91	ex 412	. . 3 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝑐 = 𝐺 → 𝐶 = 𝑆))
93	92	necon3d 2946	. 2 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → (𝐶 ≠ 𝑆 → 𝑐 ≠ 𝐺))
94	6, 93	mpd 15	1 ⊢ ((𝜑 ∧ 𝑌 = 𝑍 ∧ 𝜓) → 𝑐 ≠ 𝐺)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   = wceq 1540   ∈ wcel 2109   ≠ wne 2925   class class class wbr 5107  ‘cfv 6511  (class class class)co 7387  Basecbs 17179  lecple 17227  joincjn 18272  meetcmee 18273  Latclat 18390  Atomscatm 39256  AtLatcal 39257  HLchlt 39343  LPlanesclpl 39486

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5234  ax-sep 5251  ax-nul 5261  ax-pow 5320  ax-pr 5387  ax-un 7711

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-rmo 3354  df-reu 3355  df-rab 3406  df-v 3449  df-sbc 3754  df-csb 3863  df-dif 3917  df-un 3919  df-in 3921  df-ss 3931  df-nul 4297  df-if 4489  df-pw 4565  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4872  df-iun 4957  df-br 5108  df-opab 5170  df-mpt 5189  df-id 5533  df-xp 5644  df-rel 5645  df-cnv 5646  df-co 5647  df-dm 5648  df-rn 5649  df-res 5650  df-ima 5651  df-iota 6464  df-fun 6513  df-fn 6514  df-f 6515  df-f1 6516  df-fo 6517  df-f1o 6518  df-fv 6519  df-riota 7344  df-ov 7390  df-oprab 7391  df-proset 18255  df-poset 18274  df-plt 18289  df-lub 18305  df-glb 18306  df-join 18307  df-meet 18308  df-p0 18384  df-lat 18391  df-clat 18458  df-oposet 39169  df-ol 39171  df-oml 39172  df-covers 39259  df-ats 39260  df-atl 39291  df-cvlat 39315  df-hlat 39344  df-llines 39492  df-lplanes 39493

This theorem is referenced by:  dalem28  39694  dalem31N  39697