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Theorem isinag 28741

Description: Property for point 𝑋 to lie in the angle ⟨“𝐴𝐵𝐶”⟩. Definition 11.23 of [Schwabhauser] p. 101. (Contributed by Thierry Arnoux, 15-Aug-2020.)

**Hypotheses**
Ref	Expression
isinag.p	⊢ 𝑃 = (Base‘𝐺)
isinag.i	⊢ 𝐼 = (Itv‘𝐺)
isinag.k	⊢ 𝐾 = (hlG‘𝐺)
isinag.x	⊢ (𝜑 → 𝑋 ∈ 𝑃)
isinag.a	⊢ (𝜑 → 𝐴 ∈ 𝑃)
isinag.b	⊢ (𝜑 → 𝐵 ∈ 𝑃)
isinag.c	⊢ (𝜑 → 𝐶 ∈ 𝑃)
isinag.g	⊢ (𝜑 → 𝐺 ∈ 𝑉)

**Assertion**
Ref	Expression
isinag	⊢ (𝜑 → (𝑋(inA‘𝐺)⟨“𝐴𝐵𝐶”⟩ ↔ ((𝐴 ≠ 𝐵 ∧ 𝐶 ≠ 𝐵 ∧ 𝑋 ≠ 𝐵) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ (𝐴𝐼𝐶) ∧ (𝑥 = 𝐵 ∨ 𝑥(𝐾‘𝐵)𝑋)))))

Distinct variable groups: 𝑥,𝐴 𝑥,𝐵 𝑥,𝐶 𝑥,𝐺 𝑥,𝑃 𝑥,𝑋 𝜑,𝑥 Allowed substitution hints: 𝐼(𝑥) 𝐾(𝑥) 𝑉(𝑥)

Proof of Theorem isinag Dummy variables 𝑝 𝑡 𝑔 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		simpr 484	. . . . . . . 8 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → 𝑡 = ⟨“𝐴𝐵𝐶”⟩)
2	1	fveq1d 6842	. . . . . . 7 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → (𝑡‘0) = (⟨“𝐴𝐵𝐶”⟩‘0))
3	1	fveq1d 6842	. . . . . . 7 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → (𝑡‘1) = (⟨“𝐴𝐵𝐶”⟩‘1))
4	2, 3	neeq12d 2986	. . . . . 6 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → ((𝑡‘0) ≠ (𝑡‘1) ↔ (⟨“𝐴𝐵𝐶”⟩‘0) ≠ (⟨“𝐴𝐵𝐶”⟩‘1)))
5	1	fveq1d 6842	. . . . . . 7 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → (𝑡‘2) = (⟨“𝐴𝐵𝐶”⟩‘2))
6	5, 3	neeq12d 2986	. . . . . 6 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → ((𝑡‘2) ≠ (𝑡‘1) ↔ (⟨“𝐴𝐵𝐶”⟩‘2) ≠ (⟨“𝐴𝐵𝐶”⟩‘1)))
7		simpl 482	. . . . . . 7 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → 𝑝 = 𝑋)
8	7, 3	neeq12d 2986	. . . . . 6 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → (𝑝 ≠ (𝑡‘1) ↔ 𝑋 ≠ (⟨“𝐴𝐵𝐶”⟩‘1)))
9	4, 6, 8	3anbi123d 1438	. . . . 5 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ↔ ((⟨“𝐴𝐵𝐶”⟩‘0) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ (⟨“𝐴𝐵𝐶”⟩‘2) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ 𝑋 ≠ (⟨“𝐴𝐵𝐶”⟩‘1))))
10	2, 5	oveq12d 7387	. . . . . . . 8 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → ((𝑡‘0)𝐼(𝑡‘2)) = ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)))
11	10	eleq2d 2814	. . . . . . 7 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ↔ 𝑥 ∈ ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2))))
12	3	eqeq2d 2740	. . . . . . . 8 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → (𝑥 = (𝑡‘1) ↔ 𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1)))
13		eqidd 2730	. . . . . . . . 9 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → 𝑥 = 𝑥)
14	3	fveq2d 6844	. . . . . . . . 9 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → (𝐾‘(𝑡‘1)) = (𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1)))
15	13, 14, 7	breq123d 5116	. . . . . . . 8 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → (𝑥(𝐾‘(𝑡‘1))𝑝 ↔ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋))
16	12, 15	orbi12d 918	. . . . . . 7 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → ((𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝) ↔ (𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ∨ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋)))
17	11, 16	anbi12d 632	. . . . . 6 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → ((𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝)) ↔ (𝑥 ∈ ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)) ∧ (𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ∨ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋))))
18	17	rexbidv 3157	. . . . 5 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → (∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝)) ↔ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)) ∧ (𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ∨ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋))))
19	9, 18	anbi12d 632	. . . 4 ⊢ ((𝑝 = 𝑋 ∧ 𝑡 = ⟨“𝐴𝐵𝐶”⟩) → ((((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))) ↔ (((⟨“𝐴𝐵𝐶”⟩‘0) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ (⟨“𝐴𝐵𝐶”⟩‘2) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ 𝑋 ≠ (⟨“𝐴𝐵𝐶”⟩‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)) ∧ (𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ∨ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋)))))
20		eqid 2729	. . . 4 ⊢ {⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))} = {⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))}
21	19, 20	brab2a 5724	. . 3 ⊢ (𝑋{⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))}⟨“𝐴𝐵𝐶”⟩ ↔ ((𝑋 ∈ 𝑃 ∧ ⟨“𝐴𝐵𝐶”⟩ ∈ (𝑃 ↑_m (0..^3))) ∧ (((⟨“𝐴𝐵𝐶”⟩‘0) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ (⟨“𝐴𝐵𝐶”⟩‘2) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ 𝑋 ≠ (⟨“𝐴𝐵𝐶”⟩‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)) ∧ (𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ∨ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋)))))
22		isinag.a	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ 𝑃)
23		s3fv0 14833	. . . . . . . 8 ⊢ (𝐴 ∈ 𝑃 → (⟨“𝐴𝐵𝐶”⟩‘0) = 𝐴)
24	22, 23	syl 17	. . . . . . 7 ⊢ (𝜑 → (⟨“𝐴𝐵𝐶”⟩‘0) = 𝐴)
25		isinag.b	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ 𝑃)
26		s3fv1 14834	. . . . . . . 8 ⊢ (𝐵 ∈ 𝑃 → (⟨“𝐴𝐵𝐶”⟩‘1) = 𝐵)
27	25, 26	syl 17	. . . . . . 7 ⊢ (𝜑 → (⟨“𝐴𝐵𝐶”⟩‘1) = 𝐵)
28	24, 27	neeq12d 2986	. . . . . 6 ⊢ (𝜑 → ((⟨“𝐴𝐵𝐶”⟩‘0) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ↔ 𝐴 ≠ 𝐵))
29		isinag.c	. . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ 𝑃)
30		s3fv2 14835	. . . . . . . 8 ⊢ (𝐶 ∈ 𝑃 → (⟨“𝐴𝐵𝐶”⟩‘2) = 𝐶)
31	29, 30	syl 17	. . . . . . 7 ⊢ (𝜑 → (⟨“𝐴𝐵𝐶”⟩‘2) = 𝐶)
32	31, 27	neeq12d 2986	. . . . . 6 ⊢ (𝜑 → ((⟨“𝐴𝐵𝐶”⟩‘2) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ↔ 𝐶 ≠ 𝐵))
33	27	neeq2d 2985	. . . . . 6 ⊢ (𝜑 → (𝑋 ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ↔ 𝑋 ≠ 𝐵))
34	28, 32, 33	3anbi123d 1438	. . . . 5 ⊢ (𝜑 → (((⟨“𝐴𝐵𝐶”⟩‘0) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ (⟨“𝐴𝐵𝐶”⟩‘2) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ 𝑋 ≠ (⟨“𝐴𝐵𝐶”⟩‘1)) ↔ (𝐴 ≠ 𝐵 ∧ 𝐶 ≠ 𝐵 ∧ 𝑋 ≠ 𝐵)))
35	24, 31	oveq12d 7387	. . . . . . . 8 ⊢ (𝜑 → ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)) = (𝐴𝐼𝐶))
36	35	eleq2d 2814	. . . . . . 7 ⊢ (𝜑 → (𝑥 ∈ ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)) ↔ 𝑥 ∈ (𝐴𝐼𝐶)))
37	27	eqeq2d 2740	. . . . . . . 8 ⊢ (𝜑 → (𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ↔ 𝑥 = 𝐵))
38	27	fveq2d 6844	. . . . . . . . 9 ⊢ (𝜑 → (𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1)) = (𝐾‘𝐵))
39	38	breqd 5113	. . . . . . . 8 ⊢ (𝜑 → (𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋 ↔ 𝑥(𝐾‘𝐵)𝑋))
40	37, 39	orbi12d 918	. . . . . . 7 ⊢ (𝜑 → ((𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ∨ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋) ↔ (𝑥 = 𝐵 ∨ 𝑥(𝐾‘𝐵)𝑋)))
41	36, 40	anbi12d 632	. . . . . 6 ⊢ (𝜑 → ((𝑥 ∈ ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)) ∧ (𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ∨ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋)) ↔ (𝑥 ∈ (𝐴𝐼𝐶) ∧ (𝑥 = 𝐵 ∨ 𝑥(𝐾‘𝐵)𝑋))))
42	41	rexbidv 3157	. . . . 5 ⊢ (𝜑 → (∃𝑥 ∈ 𝑃 (𝑥 ∈ ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)) ∧ (𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ∨ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋)) ↔ ∃𝑥 ∈ 𝑃 (𝑥 ∈ (𝐴𝐼𝐶) ∧ (𝑥 = 𝐵 ∨ 𝑥(𝐾‘𝐵)𝑋))))
43	34, 42	anbi12d 632	. . . 4 ⊢ (𝜑 → ((((⟨“𝐴𝐵𝐶”⟩‘0) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ (⟨“𝐴𝐵𝐶”⟩‘2) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ 𝑋 ≠ (⟨“𝐴𝐵𝐶”⟩‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)) ∧ (𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ∨ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋))) ↔ ((𝐴 ≠ 𝐵 ∧ 𝐶 ≠ 𝐵 ∧ 𝑋 ≠ 𝐵) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ (𝐴𝐼𝐶) ∧ (𝑥 = 𝐵 ∨ 𝑥(𝐾‘𝐵)𝑋)))))
44	43	anbi2d 630	. . 3 ⊢ (𝜑 → (((𝑋 ∈ 𝑃 ∧ ⟨“𝐴𝐵𝐶”⟩ ∈ (𝑃 ↑_m (0..^3))) ∧ (((⟨“𝐴𝐵𝐶”⟩‘0) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ (⟨“𝐴𝐵𝐶”⟩‘2) ≠ (⟨“𝐴𝐵𝐶”⟩‘1) ∧ 𝑋 ≠ (⟨“𝐴𝐵𝐶”⟩‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((⟨“𝐴𝐵𝐶”⟩‘0)𝐼(⟨“𝐴𝐵𝐶”⟩‘2)) ∧ (𝑥 = (⟨“𝐴𝐵𝐶”⟩‘1) ∨ 𝑥(𝐾‘(⟨“𝐴𝐵𝐶”⟩‘1))𝑋)))) ↔ ((𝑋 ∈ 𝑃 ∧ ⟨“𝐴𝐵𝐶”⟩ ∈ (𝑃 ↑_m (0..^3))) ∧ ((𝐴 ≠ 𝐵 ∧ 𝐶 ≠ 𝐵 ∧ 𝑋 ≠ 𝐵) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ (𝐴𝐼𝐶) ∧ (𝑥 = 𝐵 ∨ 𝑥(𝐾‘𝐵)𝑋))))))
45	21, 44	bitrid 283	. 2 ⊢ (𝜑 → (𝑋{⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))}⟨“𝐴𝐵𝐶”⟩ ↔ ((𝑋 ∈ 𝑃 ∧ ⟨“𝐴𝐵𝐶”⟩ ∈ (𝑃 ↑_m (0..^3))) ∧ ((𝐴 ≠ 𝐵 ∧ 𝐶 ≠ 𝐵 ∧ 𝑋 ≠ 𝐵) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ (𝐴𝐼𝐶) ∧ (𝑥 = 𝐵 ∨ 𝑥(𝐾‘𝐵)𝑋))))))
46		isinag.g	. . . 4 ⊢ (𝜑 → 𝐺 ∈ 𝑉)
47		elex 3465	. . . 4 ⊢ (𝐺 ∈ 𝑉 → 𝐺 ∈ V)
48		fveq2 6840	. . . . . . . . . 10 ⊢ (𝑔 = 𝐺 → (Base‘𝑔) = (Base‘𝐺))
49		isinag.p	. . . . . . . . . 10 ⊢ 𝑃 = (Base‘𝐺)
50	48, 49	eqtr4di 2782	. . . . . . . . 9 ⊢ (𝑔 = 𝐺 → (Base‘𝑔) = 𝑃)
51	50	eleq2d 2814	. . . . . . . 8 ⊢ (𝑔 = 𝐺 → (𝑝 ∈ (Base‘𝑔) ↔ 𝑝 ∈ 𝑃))
52	50	oveq1d 7384	. . . . . . . . 9 ⊢ (𝑔 = 𝐺 → ((Base‘𝑔) ↑_m (0..^3)) = (𝑃 ↑_m (0..^3)))
53	52	eleq2d 2814	. . . . . . . 8 ⊢ (𝑔 = 𝐺 → (𝑡 ∈ ((Base‘𝑔) ↑_m (0..^3)) ↔ 𝑡 ∈ (𝑃 ↑_m (0..^3))))
54	51, 53	anbi12d 632	. . . . . . 7 ⊢ (𝑔 = 𝐺 → ((𝑝 ∈ (Base‘𝑔) ∧ 𝑡 ∈ ((Base‘𝑔) ↑_m (0..^3))) ↔ (𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3)))))
55		fveq2 6840	. . . . . . . . . . . . 13 ⊢ (𝑔 = 𝐺 → (Itv‘𝑔) = (Itv‘𝐺))
56		isinag.i	. . . . . . . . . . . . 13 ⊢ 𝐼 = (Itv‘𝐺)
57	55, 56	eqtr4di 2782	. . . . . . . . . . . 12 ⊢ (𝑔 = 𝐺 → (Itv‘𝑔) = 𝐼)
58	57	oveqd 7386	. . . . . . . . . . 11 ⊢ (𝑔 = 𝐺 → ((𝑡‘0)(Itv‘𝑔)(𝑡‘2)) = ((𝑡‘0)𝐼(𝑡‘2)))
59	58	eleq2d 2814	. . . . . . . . . 10 ⊢ (𝑔 = 𝐺 → (𝑥 ∈ ((𝑡‘0)(Itv‘𝑔)(𝑡‘2)) ↔ 𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2))))
60		fveq2 6840	. . . . . . . . . . . . . 14 ⊢ (𝑔 = 𝐺 → (hlG‘𝑔) = (hlG‘𝐺))
61		isinag.k	. . . . . . . . . . . . . 14 ⊢ 𝐾 = (hlG‘𝐺)
62	60, 61	eqtr4di 2782	. . . . . . . . . . . . 13 ⊢ (𝑔 = 𝐺 → (hlG‘𝑔) = 𝐾)
63	62	fveq1d 6842	. . . . . . . . . . . 12 ⊢ (𝑔 = 𝐺 → ((hlG‘𝑔)‘(𝑡‘1)) = (𝐾‘(𝑡‘1)))
64	63	breqd 5113	. . . . . . . . . . 11 ⊢ (𝑔 = 𝐺 → (𝑥((hlG‘𝑔)‘(𝑡‘1))𝑝 ↔ 𝑥(𝐾‘(𝑡‘1))𝑝))
65	64	orbi2d 915	. . . . . . . . . 10 ⊢ (𝑔 = 𝐺 → ((𝑥 = (𝑡‘1) ∨ 𝑥((hlG‘𝑔)‘(𝑡‘1))𝑝) ↔ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝)))
66	59, 65	anbi12d 632	. . . . . . . . 9 ⊢ (𝑔 = 𝐺 → ((𝑥 ∈ ((𝑡‘0)(Itv‘𝑔)(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥((hlG‘𝑔)‘(𝑡‘1))𝑝)) ↔ (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))
67	50, 66	rexeqbidv 3317	. . . . . . . 8 ⊢ (𝑔 = 𝐺 → (∃𝑥 ∈ (Base‘𝑔)(𝑥 ∈ ((𝑡‘0)(Itv‘𝑔)(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥((hlG‘𝑔)‘(𝑡‘1))𝑝)) ↔ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))
68	67	anbi2d 630	. . . . . . 7 ⊢ (𝑔 = 𝐺 → ((((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ (Base‘𝑔)(𝑥 ∈ ((𝑡‘0)(Itv‘𝑔)(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥((hlG‘𝑔)‘(𝑡‘1))𝑝))) ↔ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝)))))
69	54, 68	anbi12d 632	. . . . . 6 ⊢ (𝑔 = 𝐺 → (((𝑝 ∈ (Base‘𝑔) ∧ 𝑡 ∈ ((Base‘𝑔) ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ (Base‘𝑔)(𝑥 ∈ ((𝑡‘0)(Itv‘𝑔)(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥((hlG‘𝑔)‘(𝑡‘1))𝑝)))) ↔ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))))
70	69	opabbidv 5168	. . . . 5 ⊢ (𝑔 = 𝐺 → {⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ (Base‘𝑔) ∧ 𝑡 ∈ ((Base‘𝑔) ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ (Base‘𝑔)(𝑥 ∈ ((𝑡‘0)(Itv‘𝑔)(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥((hlG‘𝑔)‘(𝑡‘1))𝑝))))} = {⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))})
71		df-inag 28740	. . . . 5 ⊢ inA = (𝑔 ∈ V ↦ {⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ (Base‘𝑔) ∧ 𝑡 ∈ ((Base‘𝑔) ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ (Base‘𝑔)(𝑥 ∈ ((𝑡‘0)(Itv‘𝑔)(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥((hlG‘𝑔)‘(𝑡‘1))𝑝))))})
72	49	fvexi 6854	. . . . . . 7 ⊢ 𝑃 ∈ V
73		ovex 7402	. . . . . . 7 ⊢ (𝑃 ↑_m (0..^3)) ∈ V
74	72, 73	xpex 7709	. . . . . 6 ⊢ (𝑃 × (𝑃 ↑_m (0..^3))) ∈ V
75		opabssxp 5723	. . . . . 6 ⊢ {⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))} ⊆ (𝑃 × (𝑃 ↑_m (0..^3)))
76	74, 75	ssexi 5272	. . . . 5 ⊢ {⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))} ∈ V
77	70, 71, 76	fvmpt 6950	. . . 4 ⊢ (𝐺 ∈ V → (inA‘𝐺) = {⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))})
78	46, 47, 77	3syl 18	. . 3 ⊢ (𝜑 → (inA‘𝐺) = {⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))})
79	78	breqd 5113	. 2 ⊢ (𝜑 → (𝑋(inA‘𝐺)⟨“𝐴𝐵𝐶”⟩ ↔ 𝑋{⟨𝑝, 𝑡⟩ ∣ ((𝑝 ∈ 𝑃 ∧ 𝑡 ∈ (𝑃 ↑_m (0..^3))) ∧ (((𝑡‘0) ≠ (𝑡‘1) ∧ (𝑡‘2) ≠ (𝑡‘1) ∧ 𝑝 ≠ (𝑡‘1)) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ ((𝑡‘0)𝐼(𝑡‘2)) ∧ (𝑥 = (𝑡‘1) ∨ 𝑥(𝐾‘(𝑡‘1))𝑝))))}⟨“𝐴𝐵𝐶”⟩))
80		isinag.x	. . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑃)
81	22, 25, 29	s3cld 14814	. . . . 5 ⊢ (𝜑 → ⟨“𝐴𝐵𝐶”⟩ ∈ Word 𝑃)
82		s3len 14836	. . . . 5 ⊢ (♯‘⟨“𝐴𝐵𝐶”⟩) = 3
83		3nn0 12436	. . . . . 6 ⊢ 3 ∈ ℕ₀
84		wrdmap 14487	. . . . . 6 ⊢ ((𝑃 ∈ V ∧ 3 ∈ ℕ₀) → ((⟨“𝐴𝐵𝐶”⟩ ∈ Word 𝑃 ∧ (♯‘⟨“𝐴𝐵𝐶”⟩) = 3) ↔ ⟨“𝐴𝐵𝐶”⟩ ∈ (𝑃 ↑_m (0..^3))))
85	72, 83, 84	mp2an 692	. . . . 5 ⊢ ((⟨“𝐴𝐵𝐶”⟩ ∈ Word 𝑃 ∧ (♯‘⟨“𝐴𝐵𝐶”⟩) = 3) ↔ ⟨“𝐴𝐵𝐶”⟩ ∈ (𝑃 ↑_m (0..^3)))
86	81, 82, 85	sylanblc 589	. . . 4 ⊢ (𝜑 → ⟨“𝐴𝐵𝐶”⟩ ∈ (𝑃 ↑_m (0..^3)))
87	80, 86	jca 511	. . 3 ⊢ (𝜑 → (𝑋 ∈ 𝑃 ∧ ⟨“𝐴𝐵𝐶”⟩ ∈ (𝑃 ↑_m (0..^3))))
88	87	biantrurd 532	. 2 ⊢ (𝜑 → (((𝐴 ≠ 𝐵 ∧ 𝐶 ≠ 𝐵 ∧ 𝑋 ≠ 𝐵) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ (𝐴𝐼𝐶) ∧ (𝑥 = 𝐵 ∨ 𝑥(𝐾‘𝐵)𝑋))) ↔ ((𝑋 ∈ 𝑃 ∧ ⟨“𝐴𝐵𝐶”⟩ ∈ (𝑃 ↑_m (0..^3))) ∧ ((𝐴 ≠ 𝐵 ∧ 𝐶 ≠ 𝐵 ∧ 𝑋 ≠ 𝐵) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ (𝐴𝐼𝐶) ∧ (𝑥 = 𝐵 ∨ 𝑥(𝐾‘𝐵)𝑋))))))
89	45, 79, 88	3bitr4d 311	1 ⊢ (𝜑 → (𝑋(inA‘𝐺)⟨“𝐴𝐵𝐶”⟩ ↔ ((𝐴 ≠ 𝐵 ∧ 𝐶 ≠ 𝐵 ∧ 𝑋 ≠ 𝐵) ∧ ∃𝑥 ∈ 𝑃 (𝑥 ∈ (𝐴𝐼𝐶) ∧ (𝑥 = 𝐵 ∨ 𝑥(𝐾‘𝐵)𝑋)))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 847 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 ∃wrex 3053 Vcvv 3444 class class class wbr 5102 {copab 5164 × cxp 5629 ‘cfv 6499 (class class class)co 7369 ↑_m cmap 8776 0cc0 11044 1c1 11045 2c2 12217 3c3 12218 ℕ₀cn0 12418 ..^cfzo 13591 ♯chash 14271 Word cword 14454 ⟨“cs3 14784 Basecbs 17155 Itvcitv 28336 hlGchlg 28503 inAcinag 28738

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 5229 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 ax-cnex 11100 ax-resscn 11101 ax-1cn 11102 ax-icn 11103 ax-addcl 11104 ax-addrcl 11105 ax-mulcl 11106 ax-mulrcl 11107 ax-mulcom 11108 ax-addass 11109 ax-mulass 11110 ax-distr 11111 ax-i2m1 11112 ax-1ne0 11113 ax-1rid 11114 ax-rnegex 11115 ax-rrecex 11116 ax-cnre 11117 ax-pre-lttri 11118 ax-pre-lttrn 11119 ax-pre-ltadd 11120 ax-pre-mulgt0 11121

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 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-nel 3030 df-ral 3045 df-rex 3054 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-int 4907 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6262 df-ord 6323 df-on 6324 df-lim 6325 df-suc 6326 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7326 df-ov 7372 df-oprab 7373 df-mpo 7374 df-om 7823 df-1st 7947 df-2nd 7948 df-frecs 8237 df-wrecs 8268 df-recs 8317 df-rdg 8355 df-1o 8411 df-er 8648 df-map 8778 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-card 9868 df-pnf 11186 df-mnf 11187 df-xr 11188 df-ltxr 11189 df-le 11190 df-sub 11383 df-neg 11384 df-nn 12163 df-2 12225 df-3 12226 df-n0 12419 df-z 12506 df-uz 12770 df-fz 13445 df-fzo 13592 df-hash 14272 df-word 14455 df-concat 14512 df-s1 14537 df-s2 14790 df-s3 14791 df-inag 28740

This theorem is referenced by: isinagd 28742 inagswap 28744 inagne1 28745 inagne2 28746 inagne3 28747 inaghl 28748

W3C validator