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Theorem ttgval 28838

Description: Define a function to augment a subcomplex Hilbert space with betweenness and a line definition. (Contributed by Thierry Arnoux, 25-Mar-2019.) (Proof shortened by AV, 9-Nov-2024.)

**Hypotheses**
Ref	Expression
ttgval.n	⊢ 𝐺 = (toTG‘𝐻)
ttgval.b	⊢ 𝐵 = (Base‘𝐻)
ttgval.m	⊢ − = (-_g‘𝐻)
ttgval.s	⊢ · = ( ·_𝑠 ‘𝐻)
ttgval.i	⊢ 𝐼 = (Itv‘𝐺)

**Assertion**
Ref	Expression
ttgval	⊢ (𝐻 ∈ 𝑉 → (𝐺 = ((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝐼𝑦) ∨ 𝑥 ∈ (𝑧𝐼𝑦) ∨ 𝑦 ∈ (𝑥𝐼𝑧))})⟩) ∧ 𝐼 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})))

Distinct variable groups: 𝑥,𝑘,𝑦,𝑧 𝑥,𝐵,𝑦,𝑧 𝑘,𝐻,𝑥,𝑦,𝑧 𝑥,𝑉,𝑦,𝑧 𝑥, − ,𝑦,𝑧 𝑥, · ,𝑦,𝑧 Allowed substitution hints: 𝐵(𝑘) · (𝑘) 𝐺(𝑥,𝑦,𝑧,𝑘) 𝐼(𝑥,𝑦,𝑧,𝑘) − (𝑘) 𝑉(𝑘)

Proof of Theorem ttgval Dummy variables 𝑎 𝑏 𝑐 𝑖 𝑤 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ttgval.n	. . . . 5 ⊢ 𝐺 = (toTG‘𝐻)
2	1	a1i 11	. . . 4 ⊢ (𝐻 ∈ 𝑉 → 𝐺 = (toTG‘𝐻))
3		elex 3459	. . . . 5 ⊢ (𝐻 ∈ 𝑉 → 𝐻 ∈ V)
4		fveq2 6826	. . . . . . . . 9 ⊢ (𝑤 = 𝐻 → (Base‘𝑤) = (Base‘𝐻))
5		ttgval.b	. . . . . . . . 9 ⊢ 𝐵 = (Base‘𝐻)
6	4, 5	eqtr4di 2782	. . . . . . . 8 ⊢ (𝑤 = 𝐻 → (Base‘𝑤) = 𝐵)
7		fveq2 6826	. . . . . . . . . . . . 13 ⊢ (𝑤 = 𝐻 → (-_g‘𝑤) = (-_g‘𝐻))
8		ttgval.m	. . . . . . . . . . . . 13 ⊢ − = (-_g‘𝐻)
9	7, 8	eqtr4di 2782	. . . . . . . . . . . 12 ⊢ (𝑤 = 𝐻 → (-_g‘𝑤) = − )
10	9	oveqd 7370	. . . . . . . . . . 11 ⊢ (𝑤 = 𝐻 → (𝑧(-_g‘𝑤)𝑥) = (𝑧 − 𝑥))
11		fveq2 6826	. . . . . . . . . . . . 13 ⊢ (𝑤 = 𝐻 → ( ·_𝑠 ‘𝑤) = ( ·_𝑠 ‘𝐻))
12		ttgval.s	. . . . . . . . . . . . 13 ⊢ · = ( ·_𝑠 ‘𝐻)
13	11, 12	eqtr4di 2782	. . . . . . . . . . . 12 ⊢ (𝑤 = 𝐻 → ( ·_𝑠 ‘𝑤) = · )
14		eqidd 2730	. . . . . . . . . . . 12 ⊢ (𝑤 = 𝐻 → 𝑘 = 𝑘)
15	9	oveqd 7370	. . . . . . . . . . . 12 ⊢ (𝑤 = 𝐻 → (𝑦(-_g‘𝑤)𝑥) = (𝑦 − 𝑥))
16	13, 14, 15	oveq123d 7374	. . . . . . . . . . 11 ⊢ (𝑤 = 𝐻 → (𝑘( ·_𝑠 ‘𝑤)(𝑦(-_g‘𝑤)𝑥)) = (𝑘 · (𝑦 − 𝑥)))
17	10, 16	eqeq12d 2745	. . . . . . . . . 10 ⊢ (𝑤 = 𝐻 → ((𝑧(-_g‘𝑤)𝑥) = (𝑘( ·_𝑠 ‘𝑤)(𝑦(-_g‘𝑤)𝑥)) ↔ (𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))))
18	17	rexbidv 3153	. . . . . . . . 9 ⊢ (𝑤 = 𝐻 → (∃𝑘 ∈ (0[,]1)(𝑧(-_g‘𝑤)𝑥) = (𝑘( ·_𝑠 ‘𝑤)(𝑦(-_g‘𝑤)𝑥)) ↔ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))))
19	6, 18	rabeqbidv 3415	. . . . . . . 8 ⊢ (𝑤 = 𝐻 → {𝑧 ∈ (Base‘𝑤) ∣ ∃𝑘 ∈ (0[,]1)(𝑧(-_g‘𝑤)𝑥) = (𝑘( ·_𝑠 ‘𝑤)(𝑦(-_g‘𝑤)𝑥))} = {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})
20	6, 6, 19	mpoeq123dv 7428	. . . . . . 7 ⊢ (𝑤 = 𝐻 → (𝑥 ∈ (Base‘𝑤), 𝑦 ∈ (Base‘𝑤) ↦ {𝑧 ∈ (Base‘𝑤) ∣ ∃𝑘 ∈ (0[,]1)(𝑧(-_g‘𝑤)𝑥) = (𝑘( ·_𝑠 ‘𝑤)(𝑦(-_g‘𝑤)𝑥))}) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}))
21		oveq1 7360	. . . . . . . 8 ⊢ (𝑤 = 𝐻 → (𝑤 sSet ⟨(Itv‘ndx), 𝑖⟩) = (𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩))
22	6	rabeqdv 3412	. . . . . . . . . 10 ⊢ (𝑤 = 𝐻 → {𝑧 ∈ (Base‘𝑤) ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))} = {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})
23	6, 6, 22	mpoeq123dv 7428	. . . . . . . . 9 ⊢ (𝑤 = 𝐻 → (𝑥 ∈ (Base‘𝑤), 𝑦 ∈ (Base‘𝑤) ↦ {𝑧 ∈ (Base‘𝑤) ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))}) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))}))
24	23	opeq2d 4834	. . . . . . . 8 ⊢ (𝑤 = 𝐻 → ⟨(LineG‘ndx), (𝑥 ∈ (Base‘𝑤), 𝑦 ∈ (Base‘𝑤) ↦ {𝑧 ∈ (Base‘𝑤) ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩ = ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩)
25	21, 24	oveq12d 7371	. . . . . . 7 ⊢ (𝑤 = 𝐻 → ((𝑤 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ (Base‘𝑤), 𝑦 ∈ (Base‘𝑤) ↦ {𝑧 ∈ (Base‘𝑤) ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩) = ((𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩))
26	20, 25	csbeq12dv 3862	. . . . . 6 ⊢ (𝑤 = 𝐻 → ⦋(𝑥 ∈ (Base‘𝑤), 𝑦 ∈ (Base‘𝑤) ↦ {𝑧 ∈ (Base‘𝑤) ∣ ∃𝑘 ∈ (0[,]1)(𝑧(-_g‘𝑤)𝑥) = (𝑘( ·_𝑠 ‘𝑤)(𝑦(-_g‘𝑤)𝑥))}) / 𝑖⦌((𝑤 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ (Base‘𝑤), 𝑦 ∈ (Base‘𝑤) ↦ {𝑧 ∈ (Base‘𝑤) ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩) = ⦋(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}) / 𝑖⦌((𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩))
27		df-ttg 28837	. . . . . 6 ⊢ toTG = (𝑤 ∈ V ↦ ⦋(𝑥 ∈ (Base‘𝑤), 𝑦 ∈ (Base‘𝑤) ↦ {𝑧 ∈ (Base‘𝑤) ∣ ∃𝑘 ∈ (0[,]1)(𝑧(-_g‘𝑤)𝑥) = (𝑘( ·_𝑠 ‘𝑤)(𝑦(-_g‘𝑤)𝑥))}) / 𝑖⦌((𝑤 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ (Base‘𝑤), 𝑦 ∈ (Base‘𝑤) ↦ {𝑧 ∈ (Base‘𝑤) ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩))
28		ovex 7386	. . . . . . 7 ⊢ ((𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩) ∈ V
29	28	csbex 5253	. . . . . 6 ⊢ ⦋(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}) / 𝑖⦌((𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩) ∈ V
30	26, 27, 29	fvmpt 6934	. . . . 5 ⊢ (𝐻 ∈ V → (toTG‘𝐻) = ⦋(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}) / 𝑖⦌((𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩))
31	3, 30	syl 17	. . . 4 ⊢ (𝐻 ∈ 𝑉 → (toTG‘𝐻) = ⦋(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}) / 𝑖⦌((𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩))
32	5	fvexi 6840	. . . . . . 7 ⊢ 𝐵 ∈ V
33	32, 32	mpoex 8021	. . . . . 6 ⊢ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}) ∈ V
34	33	a1i 11	. . . . 5 ⊢ (𝐻 ∈ 𝑉 → (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}) ∈ V)
35		simpr 484	. . . . . . 7 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})) → 𝑖 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}))
36		oveq2 7361	. . . . . . . . . . 11 ⊢ (𝑎 = 𝑥 → (𝑐 − 𝑎) = (𝑐 − 𝑥))
37		oveq2 7361	. . . . . . . . . . . 12 ⊢ (𝑎 = 𝑥 → (𝑏 − 𝑎) = (𝑏 − 𝑥))
38	37	oveq2d 7369	. . . . . . . . . . 11 ⊢ (𝑎 = 𝑥 → (𝑘 · (𝑏 − 𝑎)) = (𝑘 · (𝑏 − 𝑥)))
39	36, 38	eqeq12d 2745	. . . . . . . . . 10 ⊢ (𝑎 = 𝑥 → ((𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎)) ↔ (𝑐 − 𝑥) = (𝑘 · (𝑏 − 𝑥))))
40	39	rexbidv 3153	. . . . . . . . 9 ⊢ (𝑎 = 𝑥 → (∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎)) ↔ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑥) = (𝑘 · (𝑏 − 𝑥))))
41	40	rabbidv 3404	. . . . . . . 8 ⊢ (𝑎 = 𝑥 → {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))} = {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑥) = (𝑘 · (𝑏 − 𝑥))})
42		oveq1 7360	. . . . . . . . . . . . 13 ⊢ (𝑏 = 𝑦 → (𝑏 − 𝑥) = (𝑦 − 𝑥))
43	42	oveq2d 7369	. . . . . . . . . . . 12 ⊢ (𝑏 = 𝑦 → (𝑘 · (𝑏 − 𝑥)) = (𝑘 · (𝑦 − 𝑥)))
44	43	eqeq2d 2740	. . . . . . . . . . 11 ⊢ (𝑏 = 𝑦 → ((𝑐 − 𝑥) = (𝑘 · (𝑏 − 𝑥)) ↔ (𝑐 − 𝑥) = (𝑘 · (𝑦 − 𝑥))))
45	44	rexbidv 3153	. . . . . . . . . 10 ⊢ (𝑏 = 𝑦 → (∃𝑘 ∈ (0[,]1)(𝑐 − 𝑥) = (𝑘 · (𝑏 − 𝑥)) ↔ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑥) = (𝑘 · (𝑦 − 𝑥))))
46	45	rabbidv 3404	. . . . . . . . 9 ⊢ (𝑏 = 𝑦 → {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑥) = (𝑘 · (𝑏 − 𝑥))} = {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})
47		oveq1 7360	. . . . . . . . . . . 12 ⊢ (𝑐 = 𝑧 → (𝑐 − 𝑥) = (𝑧 − 𝑥))
48	47	eqeq1d 2731	. . . . . . . . . . 11 ⊢ (𝑐 = 𝑧 → ((𝑐 − 𝑥) = (𝑘 · (𝑦 − 𝑥)) ↔ (𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))))
49	48	rexbidv 3153	. . . . . . . . . 10 ⊢ (𝑐 = 𝑧 → (∃𝑘 ∈ (0[,]1)(𝑐 − 𝑥) = (𝑘 · (𝑦 − 𝑥)) ↔ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))))
50	49	cbvrabv 3407	. . . . . . . . 9 ⊢ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑥) = (𝑘 · (𝑦 − 𝑥))} = {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}
51	46, 50	eqtrdi 2780	. . . . . . . 8 ⊢ (𝑏 = 𝑦 → {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑥) = (𝑘 · (𝑏 − 𝑥))} = {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})
52	41, 51	cbvmpov 7448	. . . . . . 7 ⊢ (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))}) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})
53	35, 52	eqtr4di 2782	. . . . . 6 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})) → 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))}))
54		simpr 484	. . . . . . . . . 10 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))}))
55	54, 52	eqtrdi 2780	. . . . . . . . 9 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → 𝑖 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}))
56	55	opeq2d 4834	. . . . . . . 8 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → ⟨(Itv‘ndx), 𝑖⟩ = ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩)
57	56	oveq2d 7369	. . . . . . 7 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → (𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩) = (𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩))
58	55	oveqd 7370	. . . . . . . . . . . 12 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → (𝑥𝑖𝑦) = (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦))
59	58	eleq2d 2814	. . . . . . . . . . 11 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → (𝑧 ∈ (𝑥𝑖𝑦) ↔ 𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦)))
60	55	oveqd 7370	. . . . . . . . . . . 12 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → (𝑧𝑖𝑦) = (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦))
61	60	eleq2d 2814	. . . . . . . . . . 11 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → (𝑥 ∈ (𝑧𝑖𝑦) ↔ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦)))
62	55	oveqd 7370	. . . . . . . . . . . 12 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → (𝑥𝑖𝑧) = (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))
63	62	eleq2d 2814	. . . . . . . . . . 11 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → (𝑦 ∈ (𝑥𝑖𝑧) ↔ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧)))
64	59, 61, 63	3orbi123d 1437	. . . . . . . . . 10 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → ((𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧)) ↔ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))))
65	64	rabbidv 3404	. . . . . . . . 9 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))} = {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})
66	65	mpoeq3dv 7432	. . . . . . . 8 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))}) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))}))
67	66	opeq2d 4834	. . . . . . 7 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩ = ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})⟩)
68	57, 67	oveq12d 7371	. . . . . 6 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑎 ∈ 𝐵, 𝑏 ∈ 𝐵 ↦ {𝑐 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑐 − 𝑎) = (𝑘 · (𝑏 − 𝑎))})) → ((𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩) = ((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})⟩))
69	53, 68	syldan 591	. . . . 5 ⊢ ((𝐻 ∈ 𝑉 ∧ 𝑖 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})) → ((𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩) = ((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})⟩))
70	34, 69	csbied 3889	. . . 4 ⊢ (𝐻 ∈ 𝑉 → ⦋(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}) / 𝑖⦌((𝐻 sSet ⟨(Itv‘ndx), 𝑖⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝑖𝑦) ∨ 𝑥 ∈ (𝑧𝑖𝑦) ∨ 𝑦 ∈ (𝑥𝑖𝑧))})⟩) = ((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})⟩))
71	2, 31, 70	3eqtrd 2768	. . 3 ⊢ (𝐻 ∈ 𝑉 → 𝐺 = ((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})⟩))
72	71	fveq2d 6830	. . . . . . . . . . . 12 ⊢ (𝐻 ∈ 𝑉 → (Itv‘𝐺) = (Itv‘((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})⟩)))
73		itvid 28402	. . . . . . . . . . . . 13 ⊢ Itv = Slot (Itv‘ndx)
74		lngndxnitvndx 28406	. . . . . . . . . . . . . 14 ⊢ (LineG‘ndx) ≠ (Itv‘ndx)
75	74	necomi 2979	. . . . . . . . . . . . 13 ⊢ (Itv‘ndx) ≠ (LineG‘ndx)
76	73, 75	setsnid 17137	. . . . . . . . . . . 12 ⊢ (Itv‘(𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩)) = (Itv‘((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})⟩))
77	72, 76	eqtr4di 2782	. . . . . . . . . . 11 ⊢ (𝐻 ∈ 𝑉 → (Itv‘𝐺) = (Itv‘(𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩)))
78		ttgval.i	. . . . . . . . . . . 12 ⊢ 𝐼 = (Itv‘𝐺)
79	78	a1i 11	. . . . . . . . . . 11 ⊢ (𝐻 ∈ 𝑉 → 𝐼 = (Itv‘𝐺))
80	73	setsid 17136	. . . . . . . . . . . 12 ⊢ ((𝐻 ∈ 𝑉 ∧ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}) ∈ V) → (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}) = (Itv‘(𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩)))
81	33, 80	mpan2 691	. . . . . . . . . . 11 ⊢ (𝐻 ∈ 𝑉 → (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}) = (Itv‘(𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩)))
82	77, 79, 81	3eqtr4d 2774	. . . . . . . . . 10 ⊢ (𝐻 ∈ 𝑉 → 𝐼 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))}))
83	82	oveqd 7370	. . . . . . . . 9 ⊢ (𝐻 ∈ 𝑉 → (𝑥𝐼𝑦) = (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦))
84	83	eleq2d 2814	. . . . . . . 8 ⊢ (𝐻 ∈ 𝑉 → (𝑧 ∈ (𝑥𝐼𝑦) ↔ 𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦)))
85	82	oveqd 7370	. . . . . . . . 9 ⊢ (𝐻 ∈ 𝑉 → (𝑧𝐼𝑦) = (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦))
86	85	eleq2d 2814	. . . . . . . 8 ⊢ (𝐻 ∈ 𝑉 → (𝑥 ∈ (𝑧𝐼𝑦) ↔ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦)))
87	82	oveqd 7370	. . . . . . . . 9 ⊢ (𝐻 ∈ 𝑉 → (𝑥𝐼𝑧) = (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))
88	87	eleq2d 2814	. . . . . . . 8 ⊢ (𝐻 ∈ 𝑉 → (𝑦 ∈ (𝑥𝐼𝑧) ↔ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧)))
89	84, 86, 88	3orbi123d 1437	. . . . . . 7 ⊢ (𝐻 ∈ 𝑉 → ((𝑧 ∈ (𝑥𝐼𝑦) ∨ 𝑥 ∈ (𝑧𝐼𝑦) ∨ 𝑦 ∈ (𝑥𝐼𝑧)) ↔ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))))
90	89	rabbidv 3404	. . . . . 6 ⊢ (𝐻 ∈ 𝑉 → {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝐼𝑦) ∨ 𝑥 ∈ (𝑧𝐼𝑦) ∨ 𝑦 ∈ (𝑥𝐼𝑧))} = {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})
91	90	mpoeq3dv 7432	. . . . 5 ⊢ (𝐻 ∈ 𝑉 → (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝐼𝑦) ∨ 𝑥 ∈ (𝑧𝐼𝑦) ∨ 𝑦 ∈ (𝑥𝐼𝑧))}) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))}))
92	91	opeq2d 4834	. . . 4 ⊢ (𝐻 ∈ 𝑉 → ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝐼𝑦) ∨ 𝑥 ∈ (𝑧𝐼𝑦) ∨ 𝑦 ∈ (𝑥𝐼𝑧))})⟩ = ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})⟩)
93	92	oveq2d 7369	. . 3 ⊢ (𝐻 ∈ 𝑉 → ((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝐼𝑦) ∨ 𝑥 ∈ (𝑧𝐼𝑦) ∨ 𝑦 ∈ (𝑥𝐼𝑧))})⟩) = ((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑥 ∈ (𝑧(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑦) ∨ 𝑦 ∈ (𝑥(𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})𝑧))})⟩))
94	71, 93	eqtr4d 2767	. 2 ⊢ (𝐻 ∈ 𝑉 → 𝐺 = ((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝐼𝑦) ∨ 𝑥 ∈ (𝑧𝐼𝑦) ∨ 𝑦 ∈ (𝑥𝐼𝑧))})⟩))
95	94, 82	jca 511	1 ⊢ (𝐻 ∈ 𝑉 → (𝐺 = ((𝐻 sSet ⟨(Itv‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})⟩) sSet ⟨(LineG‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ (𝑧 ∈ (𝑥𝐼𝑦) ∨ 𝑥 ∈ (𝑧𝐼𝑦) ∨ 𝑦 ∈ (𝑥𝐼𝑧))})⟩) ∧ 𝐼 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ {𝑧 ∈ 𝐵 ∣ ∃𝑘 ∈ (0[,]1)(𝑧 − 𝑥) = (𝑘 · (𝑦 − 𝑥))})))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∨ w3o 1085 = wceq 1540 ∈ wcel 2109 ∃wrex 3053 {crab 3396 Vcvv 3438 ⦋csb 3853 ⟨cop 4585 ‘cfv 6486 (class class class)co 7353 ∈ cmpo 7355 0cc0 11028 1c1 11029 [,]cicc 13269 sSet csts 17092 ndxcnx 17122 Basecbs 17138 ·_𝑠 cvsca 17183 -_gcsg 18832 Itvcitv 28396 LineGclng 28397 toTGcttg 28836

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 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7675 ax-cnex 11084 ax-resscn 11085 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-addrcl 11089 ax-mulcl 11090 ax-mulrcl 11091 ax-mulcom 11092 ax-addass 11093 ax-mulass 11094 ax-distr 11095 ax-i2m1 11096 ax-1ne0 11097 ax-1rid 11098 ax-rnegex 11099 ax-rrecex 11100 ax-cnre 11101 ax-pre-lttri 11102 ax-pre-lttrn 11103 ax-pre-ltadd 11104 ax-pre-mulgt0 11105

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 3346 df-rab 3397 df-v 3440 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4862 df-iun 4946 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5518 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-we 5578 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7310 df-ov 7356 df-oprab 7357 df-mpo 7358 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-er 8632 df-en 8880 df-dom 8881 df-sdom 8882 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11367 df-neg 11368 df-nn 12147 df-2 12209 df-3 12210 df-4 12211 df-5 12212 df-6 12213 df-7 12214 df-8 12215 df-9 12216 df-n0 12403 df-dec 12610 df-sets 17093 df-slot 17111 df-ndx 17123 df-itv 28398 df-lng 28399 df-ttg 28837

This theorem is referenced by: ttglem 28839 ttgitvval 28845

W3C validator