Theorem bnj110 32240

Description: Well-founded induction restricted to a set (𝐴 ∈ V). The proof has been taken from Chapter 4 of Don Monk's notes on Set Theory. See http://euclid.colorado.edu/~monkd/setth.pdf. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.)

Hypotheses

Ref	Expression
bnj110.1	⊢ 𝐴 ∈ V
bnj110.2	⊢ (𝜓 ↔ ∀𝑦 ∈ 𝐴 (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑))

Assertion

Ref	Expression
bnj110	⊢ ((𝑅 Fr 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝜓 → 𝜑)) → ∀𝑥 ∈ 𝐴 𝜑)

Distinct variable groups:   𝑥,𝐴,𝑦   𝑥,𝑅,𝑦   𝜑,𝑦

Allowed substitution hints:   𝜑(𝑥)   𝜓(𝑥,𝑦)

Proof of Theorem bnj110

Dummy variables 𝑧 𝑤 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ralnex 3199	. . . . 5 ⊢ (∀𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ¬ [𝑧 / 𝑥]𝜑 ↔ ¬ ∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥]𝜑)
2		sbcng 3766	. . . . . . . 8 ⊢ (𝑧 ∈ V → ([𝑧 / 𝑥] ¬ 𝜑 ↔ ¬ [𝑧 / 𝑥]𝜑))
3	2	elv 3446	. . . . . . 7 ⊢ ([𝑧 / 𝑥] ¬ 𝜑 ↔ ¬ [𝑧 / 𝑥]𝜑)
4	3	bicomi 227	. . . . . 6 ⊢ (¬ [𝑧 / 𝑥]𝜑 ↔ [𝑧 / 𝑥] ¬ 𝜑)
5	4	ralbii 3133	. . . . 5 ⊢ (∀𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ¬ [𝑧 / 𝑥]𝜑 ↔ ∀𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥] ¬ 𝜑)
6	1, 5	bitr3i 280	. . . 4 ⊢ (¬ ∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥]𝜑 ↔ ∀𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥] ¬ 𝜑)
7		df-rab 3115	. . . . . . 7 ⊢ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ ¬ 𝜑)}
8	7	eleq2i 2881	. . . . . 6 ⊢ (𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ↔ 𝑧 ∈ {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ ¬ 𝜑)})
9		df-sbc 3721	. . . . . . 7 ⊢ ([𝑧 / 𝑥](𝑥 ∈ 𝐴 ∧ ¬ 𝜑) ↔ 𝑧 ∈ {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ ¬ 𝜑)})
10		sbcan 3768	. . . . . . . 8 ⊢ ([𝑧 / 𝑥](𝑥 ∈ 𝐴 ∧ ¬ 𝜑) ↔ ([𝑧 / 𝑥]𝑥 ∈ 𝐴 ∧ [𝑧 / 𝑥] ¬ 𝜑))
11		sbcel1v 3786	. . . . . . . . 9 ⊢ ([𝑧 / 𝑥]𝑥 ∈ 𝐴 ↔ 𝑧 ∈ 𝐴)
12	11	anbi1i 626	. . . . . . . 8 ⊢ (([𝑧 / 𝑥]𝑥 ∈ 𝐴 ∧ [𝑧 / 𝑥] ¬ 𝜑) ↔ (𝑧 ∈ 𝐴 ∧ [𝑧 / 𝑥] ¬ 𝜑))
13	10, 12	bitri 278	. . . . . . 7 ⊢ ([𝑧 / 𝑥](𝑥 ∈ 𝐴 ∧ ¬ 𝜑) ↔ (𝑧 ∈ 𝐴 ∧ [𝑧 / 𝑥] ¬ 𝜑))
14	9, 13	bitr3i 280	. . . . . 6 ⊢ (𝑧 ∈ {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ ¬ 𝜑)} ↔ (𝑧 ∈ 𝐴 ∧ [𝑧 / 𝑥] ¬ 𝜑))
15	8, 14	bitri 278	. . . . 5 ⊢ (𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ↔ (𝑧 ∈ 𝐴 ∧ [𝑧 / 𝑥] ¬ 𝜑))
16	15	simprbi 500	. . . 4 ⊢ (𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} → [𝑧 / 𝑥] ¬ 𝜑)
17	6, 16	mprgbir 3121	. . 3 ⊢ ¬ ∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥]𝜑
18		bnj110.1	. . . . . . . . 9 ⊢ 𝐴 ∈ V
19	18	rabex 5199	. . . . . . . 8 ⊢ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ∈ V
20	19	biantrur 534	. . . . . . 7 ⊢ (𝑅 Fr 𝐴 ↔ ({𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ∈ V ∧ 𝑅 Fr 𝐴))
21		rexnal 3201	. . . . . . . 8 ⊢ (∃𝑥 ∈ 𝐴 ¬ 𝜑 ↔ ¬ ∀𝑥 ∈ 𝐴 𝜑)
22		rabn0 4293	. . . . . . . . 9 ⊢ ({𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ≠ ∅ ↔ ∃𝑥 ∈ 𝐴 ¬ 𝜑)
23		ssrab2 4007	. . . . . . . . . 10 ⊢ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ⊆ 𝐴
24	23	biantrur 534	. . . . . . . . 9 ⊢ ({𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ≠ ∅ ↔ ({𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ⊆ 𝐴 ∧ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ≠ ∅))
25	22, 24	bitr3i 280	. . . . . . . 8 ⊢ (∃𝑥 ∈ 𝐴 ¬ 𝜑 ↔ ({𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ⊆ 𝐴 ∧ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ≠ ∅))
26	21, 25	bitr3i 280	. . . . . . 7 ⊢ (¬ ∀𝑥 ∈ 𝐴 𝜑 ↔ ({𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ⊆ 𝐴 ∧ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ≠ ∅))
27		fri 5481	. . . . . . 7 ⊢ ((({𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ∈ V ∧ 𝑅 Fr 𝐴) ∧ ({𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ⊆ 𝐴 ∧ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ≠ ∅)) → ∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}∀𝑤 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ¬ 𝑤𝑅𝑧)
28	20, 26, 27	syl2anb 600	. . . . . 6 ⊢ ((𝑅 Fr 𝐴 ∧ ¬ ∀𝑥 ∈ 𝐴 𝜑) → ∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}∀𝑤 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ¬ 𝑤𝑅𝑧)
29		eqid 2798	. . . . . . . 8 ⊢ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} = {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}
30	29	bnj23 32098	. . . . . . 7 ⊢ (∀𝑤 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ¬ 𝑤𝑅𝑧 → ∀𝑦 ∈ 𝐴 (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑))
31		df-ral 3111	. . . . . . . . . 10 ⊢ (∀𝑦 ∈ 𝐴 (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑) ↔ ∀𝑦(𝑦 ∈ 𝐴 → (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)))
32	31	sbcbii 3776	. . . . . . . . 9 ⊢ ([𝑧 / 𝑥]∀𝑦 ∈ 𝐴 (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑) ↔ [𝑧 / 𝑥]∀𝑦(𝑦 ∈ 𝐴 → (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)))
33		sbcal 3780	. . . . . . . . . 10 ⊢ ([𝑧 / 𝑥]∀𝑦(𝑦 ∈ 𝐴 → (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)) ↔ ∀𝑦[𝑧 / 𝑥](𝑦 ∈ 𝐴 → (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)))
34		sbcimg 3767	. . . . . . . . . . . . 13 ⊢ (𝑧 ∈ V → ([𝑧 / 𝑥](𝑦 ∈ 𝐴 → (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)) ↔ ([𝑧 / 𝑥]𝑦 ∈ 𝐴 → [𝑧 / 𝑥](𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑))))
35	34	elv 3446	. . . . . . . . . . . 12 ⊢ ([𝑧 / 𝑥](𝑦 ∈ 𝐴 → (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)) ↔ ([𝑧 / 𝑥]𝑦 ∈ 𝐴 → [𝑧 / 𝑥](𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)))
36		vex 3444	. . . . . . . . . . . . . 14 ⊢ 𝑧 ∈ V
37		nfv 1915	. . . . . . . . . . . . . 14 ⊢ Ⅎ𝑥 𝑦 ∈ 𝐴
38	36, 37	sbcgfi 3794	. . . . . . . . . . . . 13 ⊢ ([𝑧 / 𝑥]𝑦 ∈ 𝐴 ↔ 𝑦 ∈ 𝐴)
39		sbcimg 3767	. . . . . . . . . . . . . . 15 ⊢ (𝑧 ∈ V → ([𝑧 / 𝑥](𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑) ↔ ([𝑧 / 𝑥]𝑦𝑅𝑥 → [𝑧 / 𝑥][𝑦 / 𝑥]𝜑)))
40	39	elv 3446	. . . . . . . . . . . . . 14 ⊢ ([𝑧 / 𝑥](𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑) ↔ ([𝑧 / 𝑥]𝑦𝑅𝑥 → [𝑧 / 𝑥][𝑦 / 𝑥]𝜑))
41		sbcbr2g 5088	. . . . . . . . . . . . . . . . 17 ⊢ (𝑧 ∈ V → ([𝑧 / 𝑥]𝑦𝑅𝑥 ↔ 𝑦𝑅⦋𝑧 / 𝑥⦌𝑥))
42	41	elv 3446	. . . . . . . . . . . . . . . 16 ⊢ ([𝑧 / 𝑥]𝑦𝑅𝑥 ↔ 𝑦𝑅⦋𝑧 / 𝑥⦌𝑥)
43	36	csbvargi 4340	. . . . . . . . . . . . . . . . 17 ⊢ ⦋𝑧 / 𝑥⦌𝑥 = 𝑧
44	43	breq2i 5038	. . . . . . . . . . . . . . . 16 ⊢ (𝑦𝑅⦋𝑧 / 𝑥⦌𝑥 ↔ 𝑦𝑅𝑧)
45	42, 44	bitri 278	. . . . . . . . . . . . . . 15 ⊢ ([𝑧 / 𝑥]𝑦𝑅𝑥 ↔ 𝑦𝑅𝑧)
46		nfsbc1v 3740	. . . . . . . . . . . . . . . 16 ⊢ Ⅎ𝑥[𝑦 / 𝑥]𝜑
47	36, 46	sbcgfi 3794	. . . . . . . . . . . . . . 15 ⊢ ([𝑧 / 𝑥][𝑦 / 𝑥]𝜑 ↔ [𝑦 / 𝑥]𝜑)
48	45, 47	imbi12i 354	. . . . . . . . . . . . . 14 ⊢ (([𝑧 / 𝑥]𝑦𝑅𝑥 → [𝑧 / 𝑥][𝑦 / 𝑥]𝜑) ↔ (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑))
49	40, 48	bitri 278	. . . . . . . . . . . . 13 ⊢ ([𝑧 / 𝑥](𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑) ↔ (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑))
50	38, 49	imbi12i 354	. . . . . . . . . . . 12 ⊢ (([𝑧 / 𝑥]𝑦 ∈ 𝐴 → [𝑧 / 𝑥](𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)) ↔ (𝑦 ∈ 𝐴 → (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑)))
51	35, 50	bitri 278	. . . . . . . . . . 11 ⊢ ([𝑧 / 𝑥](𝑦 ∈ 𝐴 → (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)) ↔ (𝑦 ∈ 𝐴 → (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑)))
52	51	albii 1821	. . . . . . . . . 10 ⊢ (∀𝑦[𝑧 / 𝑥](𝑦 ∈ 𝐴 → (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)) ↔ ∀𝑦(𝑦 ∈ 𝐴 → (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑)))
53	33, 52	bitri 278	. . . . . . . . 9 ⊢ ([𝑧 / 𝑥]∀𝑦(𝑦 ∈ 𝐴 → (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑)) ↔ ∀𝑦(𝑦 ∈ 𝐴 → (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑)))
54	32, 53	bitri 278	. . . . . . . 8 ⊢ ([𝑧 / 𝑥]∀𝑦 ∈ 𝐴 (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑) ↔ ∀𝑦(𝑦 ∈ 𝐴 → (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑)))
55		bnj110.2	. . . . . . . . 9 ⊢ (𝜓 ↔ ∀𝑦 ∈ 𝐴 (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑))
56	55	sbcbii 3776	. . . . . . . 8 ⊢ ([𝑧 / 𝑥]𝜓 ↔ [𝑧 / 𝑥]∀𝑦 ∈ 𝐴 (𝑦𝑅𝑥 → [𝑦 / 𝑥]𝜑))
57		df-ral 3111	. . . . . . . 8 ⊢ (∀𝑦 ∈ 𝐴 (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑) ↔ ∀𝑦(𝑦 ∈ 𝐴 → (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑)))
58	54, 56, 57	3bitr4i 306	. . . . . . 7 ⊢ ([𝑧 / 𝑥]𝜓 ↔ ∀𝑦 ∈ 𝐴 (𝑦𝑅𝑧 → [𝑦 / 𝑥]𝜑))
59	30, 58	sylibr 237	. . . . . 6 ⊢ (∀𝑤 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ¬ 𝑤𝑅𝑧 → [𝑧 / 𝑥]𝜓)
60	28, 59	bnj31 32099	. . . . 5 ⊢ ((𝑅 Fr 𝐴 ∧ ¬ ∀𝑥 ∈ 𝐴 𝜑) → ∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥]𝜓)
61		nfv 1915	. . . . . . . 8 ⊢ Ⅎ𝑧(𝜓 → 𝜑)
62		nfsbc1v 3740	. . . . . . . . 9 ⊢ Ⅎ𝑥[𝑧 / 𝑥]𝜓
63		nfsbc1v 3740	. . . . . . . . 9 ⊢ Ⅎ𝑥[𝑧 / 𝑥]𝜑
64	62, 63	nfim 1897	. . . . . . . 8 ⊢ Ⅎ𝑥([𝑧 / 𝑥]𝜓 → [𝑧 / 𝑥]𝜑)
65		sbceq1a 3731	. . . . . . . . 9 ⊢ (𝑥 = 𝑧 → (𝜓 ↔ [𝑧 / 𝑥]𝜓))
66		sbceq1a 3731	. . . . . . . . 9 ⊢ (𝑥 = 𝑧 → (𝜑 ↔ [𝑧 / 𝑥]𝜑))
67	65, 66	imbi12d 348	. . . . . . . 8 ⊢ (𝑥 = 𝑧 → ((𝜓 → 𝜑) ↔ ([𝑧 / 𝑥]𝜓 → [𝑧 / 𝑥]𝜑)))
68	61, 64, 67	cbvralw 3387	. . . . . . 7 ⊢ (∀𝑥 ∈ 𝐴 (𝜓 → 𝜑) ↔ ∀𝑧 ∈ 𝐴 ([𝑧 / 𝑥]𝜓 → [𝑧 / 𝑥]𝜑))
69		elrabi 3623	. . . . . . . . 9 ⊢ (𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} → 𝑧 ∈ 𝐴)
70	69	imim1i 63	. . . . . . . 8 ⊢ ((𝑧 ∈ 𝐴 → ([𝑧 / 𝑥]𝜓 → [𝑧 / 𝑥]𝜑)) → (𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} → ([𝑧 / 𝑥]𝜓 → [𝑧 / 𝑥]𝜑)))
71	70	ralimi2 3125	. . . . . . 7 ⊢ (∀𝑧 ∈ 𝐴 ([𝑧 / 𝑥]𝜓 → [𝑧 / 𝑥]𝜑) → ∀𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ([𝑧 / 𝑥]𝜓 → [𝑧 / 𝑥]𝜑))
72	68, 71	sylbi 220	. . . . . 6 ⊢ (∀𝑥 ∈ 𝐴 (𝜓 → 𝜑) → ∀𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ([𝑧 / 𝑥]𝜓 → [𝑧 / 𝑥]𝜑))
73		rexim 3204	. . . . . 6 ⊢ (∀𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑} ([𝑧 / 𝑥]𝜓 → [𝑧 / 𝑥]𝜑) → (∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥]𝜓 → ∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥]𝜑))
74	72, 73	syl 17	. . . . 5 ⊢ (∀𝑥 ∈ 𝐴 (𝜓 → 𝜑) → (∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥]𝜓 → ∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥]𝜑))
75	60, 74	mpan9 510	. . . 4 ⊢ (((𝑅 Fr 𝐴 ∧ ¬ ∀𝑥 ∈ 𝐴 𝜑) ∧ ∀𝑥 ∈ 𝐴 (𝜓 → 𝜑)) → ∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥]𝜑)
76	75	an32s 651	. . 3 ⊢ (((𝑅 Fr 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝜓 → 𝜑)) ∧ ¬ ∀𝑥 ∈ 𝐴 𝜑) → ∃𝑧 ∈ {𝑥 ∈ 𝐴 ∣ ¬ 𝜑}[𝑧 / 𝑥]𝜑)
77	17, 76	mto 200	. 2 ⊢ ¬ ((𝑅 Fr 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝜓 → 𝜑)) ∧ ¬ ∀𝑥 ∈ 𝐴 𝜑)
78		iman 405	. 2 ⊢ (((𝑅 Fr 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝜓 → 𝜑)) → ∀𝑥 ∈ 𝐴 𝜑) ↔ ¬ ((𝑅 Fr 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝜓 → 𝜑)) ∧ ¬ ∀𝑥 ∈ 𝐴 𝜑))
79	77, 78	mpbir 234	1 ⊢ ((𝑅 Fr 𝐴 ∧ ∀𝑥 ∈ 𝐴 (𝜓 → 𝜑)) → ∀𝑥 ∈ 𝐴 𝜑)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 399  ∀wal 1536   ∈ wcel 2111  {cab 2776   ≠ wne 2987  ∀wral 3106  ∃wrex 3107  {crab 3110  Vcvv 3441  [wsbc 3720  ⦋csb 3828   ⊆ wss 3881  ∅c0 4243   class class class wbr 5030   Fr wfr 5475

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-sep 5167

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2070  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-nul 4244  df-if 4426  df-sn 4526  df-pr 4528  df-op 4532  df-br 5031  df-fr 5478

This theorem is referenced by:  bnj157  32241  bnj580  32295  bnj1052  32357  bnj1030  32369  bnj1133  32371