Theorem bnj916 35563

Description: Technical lemma for bnj69 35640. This lemma may no longer be used or have become an indirect lemma of the theorem in question (i.e. a lemma of a lemma... of the theorem). (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (New usage is discouraged.)

Hypotheses

Ref	Expression
bnj916.1	⊢ (𝜑 ↔ (𝑓‘∅) = pred(𝑋, 𝐴, 𝑅))
bnj916.2	⊢ (𝜓 ↔ ∀𝑖 ∈ ω (suc 𝑖 ∈ 𝑛 → (𝑓‘suc 𝑖) = ∪ 𝑦 ∈ (𝑓‘𝑖) pred(𝑦, 𝐴, 𝑅)))
bnj916.3	⊢ 𝐷 = (ω ∖ {∅})
bnj916.4	⊢ 𝐵 = {𝑓 ∣ ∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)}
bnj916.5	⊢ (𝜒 ↔ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))

Assertion

Ref	Expression
bnj916	⊢ (𝑦 ∈ trCl(𝑋, 𝐴, 𝑅) → ∃𝑓∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ 𝑛 ∧ 𝑦 ∈ (𝑓‘𝑖)))

Distinct variable groups:   𝐴,𝑓,𝑖,𝑛,𝑦   𝐷,𝑖   𝑅,𝑓,𝑖,𝑛,𝑦   𝑓,𝑋,𝑖,𝑛,𝑦   𝜑,𝑖

Allowed substitution hints:   𝜑(𝑦, 𝑓, 𝑛)   𝜓(𝑦, 𝑓, 𝑖, 𝑛)   𝜒(𝑦, 𝑓, 𝑖, 𝑛)   𝐵(𝑦, 𝑓, 𝑖, 𝑛)   𝐷(𝑦, 𝑓, 𝑛)

Proof of Theorem bnj916

Step	Hyp	Ref	Expression
1		bnj256 35337	. . . . . 6 ⊢ ((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ ((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ∧ (𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖))))
2	1	2exbii 1881	. . . . 5 ⊢ (∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ ∃𝑛∃𝑖((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ∧ (𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖))))
3		19.41v 1981	. . . . . 6 ⊢ (∃𝑛((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ∧ ∃𝑖(𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖))) ↔ (∃𝑛(𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ∧ ∃𝑖(𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖))))
4		nfv 1946	. . . . . . . . 9 ⊢ Ⅎ𝑖 𝑛 ∈ 𝐷
5		bnj916.1	. . . . . . . . . . 11 ⊢ (𝜑 ↔ (𝑓‘∅) = pred(𝑋, 𝐴, 𝑅))
6		bnj916.2	. . . . . . . . . . 11 ⊢ (𝜓 ↔ ∀𝑖 ∈ ω (suc 𝑖 ∈ 𝑛 → (𝑓‘suc 𝑖) = ∪ 𝑦 ∈ (𝑓‘𝑖) pred(𝑦, 𝐴, 𝑅)))
7	5, 6	bnj911 35562	. . . . . . . . . 10 ⊢ ((𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) → ∀𝑖(𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
8	7	nf5i 2182	. . . . . . . . 9 ⊢ Ⅎ𝑖(𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)
9	4, 8	nfan 1931	. . . . . . . 8 ⊢ Ⅎ𝑖(𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
10	9	19.42 2272	. . . . . . 7 ⊢ (∃𝑖((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ∧ (𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖))) ↔ ((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ∧ ∃𝑖(𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖))))
11	10	exbii 1880	. . . . . 6 ⊢ (∃𝑛∃𝑖((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ∧ (𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖))) ↔ ∃𝑛((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ∧ ∃𝑖(𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖))))
12		df-rex 3087	. . . . . . 7 ⊢ (∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ↔ ∃𝑛(𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)))
13		df-rex 3087	. . . . . . 7 ⊢ (∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖) ↔ ∃𝑖(𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)))
14	12, 13	anbi12i 640	. . . . . 6 ⊢ ((∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖)) ↔ (∃𝑛(𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ∧ ∃𝑖(𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖))))
15	3, 11, 14	3bitr4i 306	. . . . 5 ⊢ (∃𝑛∃𝑖((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)) ∧ (𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖))) ↔ (∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖)))
16	2, 15	bitri 278	. . . 4 ⊢ (∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ (∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖)))
17	16	exbii 1880	. . 3 ⊢ (∃𝑓∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ ∃𝑓(∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖)))
18		bnj916.5	. . . . . . 7 ⊢ (𝜒 ↔ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
19	18	3anbi2i 1176	. . . . . 6 ⊢ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓) ↔ (𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ 𝑖 ∈ dom 𝑓))
20	19	anbi1i 636	. . . . 5 ⊢ (((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓) ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ ((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ 𝑖 ∈ dom 𝑓) ∧ 𝑦 ∈ (𝑓‘𝑖)))
21		df-bnj17 35318	. . . . 5 ⊢ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓) ∧ 𝑦 ∈ (𝑓‘𝑖)))
22		df-bnj17 35318	. . . . 5 ⊢ ((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ ((𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ 𝑖 ∈ dom 𝑓) ∧ 𝑦 ∈ (𝑓‘𝑖)))
23	20, 21, 22	3bitr4i 306	. . . 4 ⊢ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ (𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)))
24	23	3exbii 1882	. . 3 ⊢ (∃𝑓∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ ∃𝑓∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)))
25		bnj916.3	. . . . . . 7 ⊢ 𝐷 = (ω ∖ {∅})
26		bnj916.4	. . . . . . 7 ⊢ 𝐵 = {𝑓 ∣ ∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓)}
27	5, 6, 25, 26	bnj882 35556	. . . . . 6 ⊢ trCl(𝑋, 𝐴, 𝑅) = ∪ 𝑓 ∈ 𝐵 ∪ 𝑖 ∈ dom 𝑓(𝑓‘𝑖)
28	27	eleq2i 2852	. . . . 5 ⊢ (𝑦 ∈ trCl(𝑋, 𝐴, 𝑅) ↔ 𝑦 ∈ ∪ 𝑓 ∈ 𝐵 ∪ 𝑖 ∈ dom 𝑓(𝑓‘𝑖))
29		eliun 4954	. . . . 5 ⊢ (𝑦 ∈ ∪ 𝑓 ∈ 𝐵 ∪ 𝑖 ∈ dom 𝑓(𝑓‘𝑖) ↔ ∃𝑓 ∈ 𝐵 𝑦 ∈ ∪ 𝑖 ∈ dom 𝑓(𝑓‘𝑖))
30		eliun 4954	. . . . . 6 ⊢ (𝑦 ∈ ∪ 𝑖 ∈ dom 𝑓(𝑓‘𝑖) ↔ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖))
31	30	rexbii 3109	. . . . 5 ⊢ (∃𝑓 ∈ 𝐵 𝑦 ∈ ∪ 𝑖 ∈ dom 𝑓(𝑓‘𝑖) ↔ ∃𝑓 ∈ 𝐵 ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖))
32	28, 29, 31	3bitri 300	. . . 4 ⊢ (𝑦 ∈ trCl(𝑋, 𝐴, 𝑅) ↔ ∃𝑓 ∈ 𝐵 ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖))
33		df-rex 3087	. . . 4 ⊢ (∃𝑓 ∈ 𝐵 ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖) ↔ ∃𝑓(𝑓 ∈ 𝐵 ∧ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖)))
34	26	eqabri 2902	. . . . . 6 ⊢ (𝑓 ∈ 𝐵 ↔ ∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓))
35	34	anbi1i 636	. . . . 5 ⊢ ((𝑓 ∈ 𝐵 ∧ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖)) ↔ (∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖)))
36	35	exbii 1880	. . . 4 ⊢ (∃𝑓(𝑓 ∈ 𝐵 ∧ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖)) ↔ ∃𝑓(∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖)))
37	32, 33, 36	3bitri 300	. . 3 ⊢ (𝑦 ∈ trCl(𝑋, 𝐴, 𝑅) ↔ ∃𝑓(∃𝑛 ∈ 𝐷 (𝑓 Fn 𝑛 ∧ 𝜑 ∧ 𝜓) ∧ ∃𝑖 ∈ dom 𝑓 𝑦 ∈ (𝑓‘𝑖)))
38	17, 24, 37	3bitr4ri 307	. 2 ⊢ (𝑦 ∈ trCl(𝑋, 𝐴, 𝑅) ↔ ∃𝑓∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)))
39		bnj643 35380	. . . . . 6 ⊢ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) → 𝜒)
40	18	bnj564 35375	. . . . . . 7 ⊢ (𝜒 → dom 𝑓 = 𝑛)
41	40	eleq2d 2846	. . . . . 6 ⊢ (𝜒 → (𝑖 ∈ dom 𝑓 ↔ 𝑖 ∈ 𝑛))
42		anbi1 645	. . . . . . 7 ⊢ ((𝑖 ∈ dom 𝑓 ↔ 𝑖 ∈ 𝑛) → ((𝑖 ∈ dom 𝑓 ∧ (𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑦 ∈ (𝑓‘𝑖))) ↔ (𝑖 ∈ 𝑛 ∧ (𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑦 ∈ (𝑓‘𝑖)))))
43		bnj334 35344	. . . . . . . 8 ⊢ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ (𝑖 ∈ dom 𝑓 ∧ 𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑦 ∈ (𝑓‘𝑖)))
44		bnj252 35334	. . . . . . . 8 ⊢ ((𝑖 ∈ dom 𝑓 ∧ 𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ (𝑖 ∈ dom 𝑓 ∧ (𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑦 ∈ (𝑓‘𝑖))))
45	43, 44	bitri 278	. . . . . . 7 ⊢ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ (𝑖 ∈ dom 𝑓 ∧ (𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑦 ∈ (𝑓‘𝑖))))
46		bnj334 35344	. . . . . . . 8 ⊢ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ 𝑛 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ (𝑖 ∈ 𝑛 ∧ 𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑦 ∈ (𝑓‘𝑖)))
47		bnj252 35334	. . . . . . . 8 ⊢ ((𝑖 ∈ 𝑛 ∧ 𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ (𝑖 ∈ 𝑛 ∧ (𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑦 ∈ (𝑓‘𝑖))))
48	46, 47	bitri 278	. . . . . . 7 ⊢ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ 𝑛 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ (𝑖 ∈ 𝑛 ∧ (𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑦 ∈ (𝑓‘𝑖))))
49	42, 45, 48	3bitr4g 317	. . . . . 6 ⊢ ((𝑖 ∈ dom 𝑓 ↔ 𝑖 ∈ 𝑛) → ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ (𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ 𝑛 ∧ 𝑦 ∈ (𝑓‘𝑖))))
50	39, 41, 49	3syl 19	. . . . 5 ⊢ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) → ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) ↔ (𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ 𝑛 ∧ 𝑦 ∈ (𝑓‘𝑖))))
51	50	ibi 270	. . . 4 ⊢ ((𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) → (𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ 𝑛 ∧ 𝑦 ∈ (𝑓‘𝑖)))
52	51	2eximi 1868	. . 3 ⊢ (∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) → ∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ 𝑛 ∧ 𝑦 ∈ (𝑓‘𝑖)))
53	52	eximi 1867	. 2 ⊢ (∃𝑓∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ dom 𝑓 ∧ 𝑦 ∈ (𝑓‘𝑖)) → ∃𝑓∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ 𝑛 ∧ 𝑦 ∈ (𝑓‘𝑖)))
54	38, 53	sylbi 220	1 ⊢ (𝑦 ∈ trCl(𝑋, 𝐴, 𝑅) → ∃𝑓∃𝑛∃𝑖(𝑛 ∈ 𝐷 ∧ 𝜒 ∧ 𝑖 ∈ 𝑛 ∧ 𝑦 ∈ (𝑓‘𝑖)))

This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401   ∧ w3a 1103   = wceq 1569  ∃wex 1811   ∈ wcel 2144  {cab 2738  ∀wral 3076  ∃wrex 3086   ∖ cdif 4045  ∅c0 4278  {csn 4583  ∪ ciun 4950  dom cdm 5650  suc csuc 6364   Fn wfn 6533  ‘cfv 6538  ωcom 7877   ∧ w-bnj17 35317   predc-bnj14 35319   trClc-bnj18 35325

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-12 2212  ax-ext 2732

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-ex 1812  df-nf 1816  df-sb 2099  df-clab 2739  df-cleq 2752  df-clel 2835  df-ral 3077  df-rex 3087  df-v 3452  df-iun 4952  df-fn 6541  df-bnj17 35318  df-bnj18 35326

This theorem is used by:  bnj917  35564