Theorem oprabid 7180

Description: The law of concretion. Special case of Theorem 9.5 of [Quine] p. 61. Usage of this theorem is discouraged because it depends on ax-13 2384. Use the weaker oprabidw 7179 when possible. (Contributed by Mario Carneiro, 20-Mar-2013.) (New usage is discouraged.)

Assertion

Ref	Expression
oprabid	⊢ (⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∈ {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ 𝜑} ↔ 𝜑)

Proof of Theorem oprabid

Dummy variables 𝑎 𝑟 𝑠 𝑡 𝑤 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		opex 5347	. 2 ⊢ ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∈ V
2		opex 5347	. . . . . 6 ⊢ ⟨𝑥, 𝑦⟩ ∈ V
3		vex 3496	. . . . . 6 ⊢ 𝑧 ∈ V
4	2, 3	eqvinop 5369	. . . . 5 ⊢ (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ↔ ∃𝑎∃𝑡(𝑤 = ⟨𝑎, 𝑡⟩ ∧ ⟨𝑎, 𝑡⟩ = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩))
5	4	biimpi 218	. . . 4 ⊢ (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → ∃𝑎∃𝑡(𝑤 = ⟨𝑎, 𝑡⟩ ∧ ⟨𝑎, 𝑡⟩ = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩))
6		eqeq1 2823	. . . . . . . 8 ⊢ (𝑤 = ⟨𝑎, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ↔ ⟨𝑎, 𝑡⟩ = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩))
7		vex 3496	. . . . . . . . 9 ⊢ 𝑎 ∈ V
8		vex 3496	. . . . . . . . 9 ⊢ 𝑡 ∈ V
9	7, 8	opth1 5358	. . . . . . . 8 ⊢ (⟨𝑎, 𝑡⟩ = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → 𝑎 = ⟨𝑥, 𝑦⟩)
10	6, 9	syl6bi 255	. . . . . . 7 ⊢ (𝑤 = ⟨𝑎, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → 𝑎 = ⟨𝑥, 𝑦⟩))
11		vex 3496	. . . . . . . . . 10 ⊢ 𝑥 ∈ V
12		vex 3496	. . . . . . . . . 10 ⊢ 𝑦 ∈ V
13	11, 12	eqvinop 5369	. . . . . . . . 9 ⊢ (𝑎 = ⟨𝑥, 𝑦⟩ ↔ ∃𝑟∃𝑠(𝑎 = ⟨𝑟, 𝑠⟩ ∧ ⟨𝑟, 𝑠⟩ = ⟨𝑥, 𝑦⟩))
14		opeq1 4795	. . . . . . . . . . . . 13 ⊢ (𝑎 = ⟨𝑟, 𝑠⟩ → ⟨𝑎, 𝑡⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩)
15	14	eqeq2d 2830	. . . . . . . . . . . 12 ⊢ (𝑎 = ⟨𝑟, 𝑠⟩ → (𝑤 = ⟨𝑎, 𝑡⟩ ↔ 𝑤 = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩))
16	11, 12, 3	otth2 5366	. . . . . . . . . . . . . . 15 ⊢ (⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ↔ (𝑥 = 𝑟 ∧ 𝑦 = 𝑠 ∧ 𝑧 = 𝑡))
17		euequ 2677	. . . . . . . . . . . . . . . . . 18 ⊢ ∃!𝑥 𝑥 = 𝑟
18		eupick 2712	. . . . . . . . . . . . . . . . . 18 ⊢ ((∃!𝑥 𝑥 = 𝑟 ∧ ∃𝑥(𝑥 = 𝑟 ∧ ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑)))) → (𝑥 = 𝑟 → ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))))
19	17, 18	mpan 688	. . . . . . . . . . . . . . . . 17 ⊢ (∃𝑥(𝑥 = 𝑟 ∧ ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))) → (𝑥 = 𝑟 → ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))))
20		euequ 2677	. . . . . . . . . . . . . . . . . . 19 ⊢ ∃!𝑦 𝑦 = 𝑠
21		eupick 2712	. . . . . . . . . . . . . . . . . . 19 ⊢ ((∃!𝑦 𝑦 = 𝑠 ∧ ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))) → (𝑦 = 𝑠 → ∃𝑧(𝑧 = 𝑡 ∧ 𝜑)))
22	20, 21	mpan 688	. . . . . . . . . . . . . . . . . 18 ⊢ (∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑)) → (𝑦 = 𝑠 → ∃𝑧(𝑧 = 𝑡 ∧ 𝜑)))
23		euequ 2677	. . . . . . . . . . . . . . . . . . 19 ⊢ ∃!𝑧 𝑧 = 𝑡
24		eupick 2712	. . . . . . . . . . . . . . . . . . 19 ⊢ ((∃!𝑧 𝑧 = 𝑡 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑)) → (𝑧 = 𝑡 → 𝜑))
25	23, 24	mpan 688	. . . . . . . . . . . . . . . . . 18 ⊢ (∃𝑧(𝑧 = 𝑡 ∧ 𝜑) → (𝑧 = 𝑡 → 𝜑))
26	22, 25	syl6 35	. . . . . . . . . . . . . . . . 17 ⊢ (∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑)) → (𝑦 = 𝑠 → (𝑧 = 𝑡 → 𝜑)))
27	19, 26	syl6 35	. . . . . . . . . . . . . . . 16 ⊢ (∃𝑥(𝑥 = 𝑟 ∧ ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))) → (𝑥 = 𝑟 → (𝑦 = 𝑠 → (𝑧 = 𝑡 → 𝜑))))
28	27	3impd 1343	. . . . . . . . . . . . . . 15 ⊢ (∃𝑥(𝑥 = 𝑟 ∧ ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))) → ((𝑥 = 𝑟 ∧ 𝑦 = 𝑠 ∧ 𝑧 = 𝑡) → 𝜑))
29	16, 28	syl5bi 244	. . . . . . . . . . . . . 14 ⊢ (∃𝑥(𝑥 = 𝑟 ∧ ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))) → (⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ → 𝜑))
30		df-3an 1084	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑥 = 𝑟 ∧ 𝑦 = 𝑠 ∧ 𝑧 = 𝑡) ↔ ((𝑥 = 𝑟 ∧ 𝑦 = 𝑠) ∧ 𝑧 = 𝑡))
31	16, 30	bitri 277	. . . . . . . . . . . . . . . . . 18 ⊢ (⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ↔ ((𝑥 = 𝑟 ∧ 𝑦 = 𝑠) ∧ 𝑧 = 𝑡))
32	31	anbi1i 625	. . . . . . . . . . . . . . . . 17 ⊢ ((⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ∧ 𝜑) ↔ (((𝑥 = 𝑟 ∧ 𝑦 = 𝑠) ∧ 𝑧 = 𝑡) ∧ 𝜑))
33		anass 471	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝑥 = 𝑟 ∧ 𝑦 = 𝑠) ∧ 𝑧 = 𝑡) ∧ 𝜑) ↔ ((𝑥 = 𝑟 ∧ 𝑦 = 𝑠) ∧ (𝑧 = 𝑡 ∧ 𝜑)))
34		anass 471	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑥 = 𝑟 ∧ 𝑦 = 𝑠) ∧ (𝑧 = 𝑡 ∧ 𝜑)) ↔ (𝑥 = 𝑟 ∧ (𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))))
35	32, 33, 34	3bitri 299	. . . . . . . . . . . . . . . 16 ⊢ ((⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ∧ 𝜑) ↔ (𝑥 = 𝑟 ∧ (𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))))
36	35	3exbii 1844	. . . . . . . . . . . . . . 15 ⊢ (∃𝑥∃𝑦∃𝑧(⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ∧ 𝜑) ↔ ∃𝑥∃𝑦∃𝑧(𝑥 = 𝑟 ∧ (𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))))
37		nfcvf2 3006	. . . . . . . . . . . . . . . . . . . 20 ⊢ (¬ ∀𝑥 𝑥 = 𝑧 → Ⅎ𝑧𝑥)
38		nfcvd 2976	. . . . . . . . . . . . . . . . . . . 20 ⊢ (¬ ∀𝑥 𝑥 = 𝑧 → Ⅎ𝑧𝑟)
39	37, 38	nfeqd 2986	. . . . . . . . . . . . . . . . . . 19 ⊢ (¬ ∀𝑥 𝑥 = 𝑧 → Ⅎ𝑧 𝑥 = 𝑟)
40	39	exdistrf 2463	. . . . . . . . . . . . . . . . . 18 ⊢ (∃𝑥∃𝑧(𝑥 = 𝑟 ∧ (𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))) → ∃𝑥(𝑥 = 𝑟 ∧ ∃𝑧(𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))))
41	40	eximi 1829	. . . . . . . . . . . . . . . . 17 ⊢ (∃𝑦∃𝑥∃𝑧(𝑥 = 𝑟 ∧ (𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))) → ∃𝑦∃𝑥(𝑥 = 𝑟 ∧ ∃𝑧(𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))))
42		excom 2162	. . . . . . . . . . . . . . . . 17 ⊢ (∃𝑥∃𝑦∃𝑧(𝑥 = 𝑟 ∧ (𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))) ↔ ∃𝑦∃𝑥∃𝑧(𝑥 = 𝑟 ∧ (𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))))
43		excom 2162	. . . . . . . . . . . . . . . . 17 ⊢ (∃𝑥∃𝑦(𝑥 = 𝑟 ∧ ∃𝑧(𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))) ↔ ∃𝑦∃𝑥(𝑥 = 𝑟 ∧ ∃𝑧(𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))))
44	41, 42, 43	3imtr4i 294	. . . . . . . . . . . . . . . 16 ⊢ (∃𝑥∃𝑦∃𝑧(𝑥 = 𝑟 ∧ (𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))) → ∃𝑥∃𝑦(𝑥 = 𝑟 ∧ ∃𝑧(𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))))
45		nfcvf2 3006	. . . . . . . . . . . . . . . . . 18 ⊢ (¬ ∀𝑥 𝑥 = 𝑦 → Ⅎ𝑦𝑥)
46		nfcvd 2976	. . . . . . . . . . . . . . . . . 18 ⊢ (¬ ∀𝑥 𝑥 = 𝑦 → Ⅎ𝑦𝑟)
47	45, 46	nfeqd 2986	. . . . . . . . . . . . . . . . 17 ⊢ (¬ ∀𝑥 𝑥 = 𝑦 → Ⅎ𝑦 𝑥 = 𝑟)
48	47	exdistrf 2463	. . . . . . . . . . . . . . . 16 ⊢ (∃𝑥∃𝑦(𝑥 = 𝑟 ∧ ∃𝑧(𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))) → ∃𝑥(𝑥 = 𝑟 ∧ ∃𝑦∃𝑧(𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))))
49		nfcvf2 3006	. . . . . . . . . . . . . . . . . . . 20 ⊢ (¬ ∀𝑦 𝑦 = 𝑧 → Ⅎ𝑧𝑦)
50		nfcvd 2976	. . . . . . . . . . . . . . . . . . . 20 ⊢ (¬ ∀𝑦 𝑦 = 𝑧 → Ⅎ𝑧𝑠)
51	49, 50	nfeqd 2986	. . . . . . . . . . . . . . . . . . 19 ⊢ (¬ ∀𝑦 𝑦 = 𝑧 → Ⅎ𝑧 𝑦 = 𝑠)
52	51	exdistrf 2463	. . . . . . . . . . . . . . . . . 18 ⊢ (∃𝑦∃𝑧(𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑)) → ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑)))
53	52	anim2i 618	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑥 = 𝑟 ∧ ∃𝑦∃𝑧(𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))) → (𝑥 = 𝑟 ∧ ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))))
54	53	eximi 1829	. . . . . . . . . . . . . . . 16 ⊢ (∃𝑥(𝑥 = 𝑟 ∧ ∃𝑦∃𝑧(𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))) → ∃𝑥(𝑥 = 𝑟 ∧ ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))))
55	44, 48, 54	3syl 18	. . . . . . . . . . . . . . 15 ⊢ (∃𝑥∃𝑦∃𝑧(𝑥 = 𝑟 ∧ (𝑦 = 𝑠 ∧ (𝑧 = 𝑡 ∧ 𝜑))) → ∃𝑥(𝑥 = 𝑟 ∧ ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))))
56	36, 55	sylbi 219	. . . . . . . . . . . . . 14 ⊢ (∃𝑥∃𝑦∃𝑧(⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ∧ 𝜑) → ∃𝑥(𝑥 = 𝑟 ∧ ∃𝑦(𝑦 = 𝑠 ∧ ∃𝑧(𝑧 = 𝑡 ∧ 𝜑))))
57	29, 56	syl11 33	. . . . . . . . . . . . 13 ⊢ (⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ → (∃𝑥∃𝑦∃𝑧(⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ∧ 𝜑) → 𝜑))
58		eqeq1 2823	. . . . . . . . . . . . . . 15 ⊢ (𝑤 = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ↔ ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩))
59		eqcom 2826	. . . . . . . . . . . . . . 15 ⊢ (⟨⟨𝑟, 𝑠⟩, 𝑡⟩ = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ↔ ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩)
60	58, 59	syl6bb 289	. . . . . . . . . . . . . 14 ⊢ (𝑤 = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ↔ ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩))
61	60	anbi1d 631	. . . . . . . . . . . . . . . 16 ⊢ (𝑤 = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ → ((𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) ↔ (⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ∧ 𝜑)))
62	61	3exbidv 1920	. . . . . . . . . . . . . . 15 ⊢ (𝑤 = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) ↔ ∃𝑥∃𝑦∃𝑧(⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ∧ 𝜑)))
63	62	imbi1d 344	. . . . . . . . . . . . . 14 ⊢ (𝑤 = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ → ((∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑) ↔ (∃𝑥∃𝑦∃𝑧(⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ∧ 𝜑) → 𝜑)))
64	60, 63	imbi12d 347	. . . . . . . . . . . . 13 ⊢ (𝑤 = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ → ((𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑)) ↔ (⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ → (∃𝑥∃𝑦∃𝑧(⟨⟨𝑥, 𝑦⟩, 𝑧⟩ = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ ∧ 𝜑) → 𝜑))))
65	57, 64	mpbiri 260	. . . . . . . . . . . 12 ⊢ (𝑤 = ⟨⟨𝑟, 𝑠⟩, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑)))
66	15, 65	syl6bi 255	. . . . . . . . . . 11 ⊢ (𝑎 = ⟨𝑟, 𝑠⟩ → (𝑤 = ⟨𝑎, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑))))
67	66	adantr 483	. . . . . . . . . 10 ⊢ ((𝑎 = ⟨𝑟, 𝑠⟩ ∧ ⟨𝑟, 𝑠⟩ = ⟨𝑥, 𝑦⟩) → (𝑤 = ⟨𝑎, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑))))
68	67	exlimivv 1927	. . . . . . . . 9 ⊢ (∃𝑟∃𝑠(𝑎 = ⟨𝑟, 𝑠⟩ ∧ ⟨𝑟, 𝑠⟩ = ⟨𝑥, 𝑦⟩) → (𝑤 = ⟨𝑎, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑))))
69	13, 68	sylbi 219	. . . . . . . 8 ⊢ (𝑎 = ⟨𝑥, 𝑦⟩ → (𝑤 = ⟨𝑎, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑))))
70	69	com3l 89	. . . . . . 7 ⊢ (𝑤 = ⟨𝑎, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (𝑎 = ⟨𝑥, 𝑦⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑))))
71	10, 70	mpdd 43	. . . . . 6 ⊢ (𝑤 = ⟨𝑎, 𝑡⟩ → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑)))
72	71	adantr 483	. . . . 5 ⊢ ((𝑤 = ⟨𝑎, 𝑡⟩ ∧ ⟨𝑎, 𝑡⟩ = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩) → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑)))
73	72	exlimivv 1927	. . . 4 ⊢ (∃𝑎∃𝑡(𝑤 = ⟨𝑎, 𝑡⟩ ∧ ⟨𝑎, 𝑡⟩ = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩) → (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑)))
74	5, 73	mpcom 38	. . 3 ⊢ (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → 𝜑))
75		19.8a 2173	. . . . 5 ⊢ ((𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → ∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑))
76		19.8a 2173	. . . . 5 ⊢ (∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → ∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑))
77		19.8a 2173	. . . . 5 ⊢ (∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → ∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑))
78	75, 76, 77	3syl 18	. . . 4 ⊢ ((𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) → ∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑))
79	78	ex 415	. . 3 ⊢ (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (𝜑 → ∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑)))
80	74, 79	impbid 214	. 2 ⊢ (𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ → (∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑) ↔ 𝜑))
81		df-oprab 7152	. 2 ⊢ {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ 𝜑} = {𝑤 ∣ ∃𝑥∃𝑦∃𝑧(𝑤 = ⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∧ 𝜑)}
82	1, 80, 81	elab2 3668	1 ⊢ (⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∈ {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ 𝜑} ↔ 𝜑)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   ∧ w3a 1082  ∀wal 1529   = wceq 1531  ∃wex 1774   ∈ wcel 2108  ∃!weu 2647  ⟨cop 4565  {coprab 7149

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1905  ax-6 1964  ax-7 2009  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2154  ax-12 2170  ax-13 2384  ax-ext 2791  ax-sep 5194  ax-nul 5201  ax-pr 5320

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1084  df-tru 1534  df-ex 1775  df-nf 1779  df-sb 2064  df-mo 2616  df-eu 2648  df-clab 2798  df-cleq 2812  df-clel 2891  df-nfc 2961  df-rab 3145  df-v 3495  df-dif 3937  df-un 3939  df-in 3941  df-ss 3950  df-nul 4290  df-if 4466  df-sn 4560  df-pr 4562  df-op 4566  df-oprab 7152

This theorem is referenced by:  ssoprab2b  7215