Theorem trpredtr 30974

Description: The transitive predecessors are transitive in 𝑅 and 𝐴 (Contributed by Scott Fenton, 20-Feb-2011.) (Revised by Mario Carneiro, 26-Jun-2015.)

Assertion

Ref	Expression
trpredtr	⊢ ((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) → (𝑌 ∈ TrPred(𝑅, 𝐴, 𝑋) → Pred(𝑅, 𝐴, 𝑌) ⊆ TrPred(𝑅, 𝐴, 𝑋)))

Proof of Theorem trpredtr

Dummy variables 𝑎 𝑓 𝑖 𝑗 𝑡 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eltrpred 30970	. 2 ⊢ (𝑌 ∈ TrPred(𝑅, 𝐴, 𝑋) ↔ ∃𝑖 ∈ ω 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖))
2		simplr 788	. . . . . 6 ⊢ ((((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑖 ∈ ω) ∧ 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)) → 𝑖 ∈ ω)
3		peano2 6978	. . . . . 6 ⊢ (𝑖 ∈ ω → suc 𝑖 ∈ ω)
4	2, 3	syl 17	. . . . 5 ⊢ ((((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑖 ∈ ω) ∧ 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)) → suc 𝑖 ∈ ω)
5		simpr 476	. . . . . . 7 ⊢ ((((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑖 ∈ ω) ∧ 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)) → 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖))
6		ssid 3587	. . . . . . 7 ⊢ Pred(𝑅, 𝐴, 𝑌) ⊆ Pred(𝑅, 𝐴, 𝑌)
7		predeq3 5601	. . . . . . . . . 10 ⊢ (𝑡 = 𝑌 → Pred(𝑅, 𝐴, 𝑡) = Pred(𝑅, 𝐴, 𝑌))
8	7	sseq2d 3596	. . . . . . . . 9 ⊢ (𝑡 = 𝑌 → (Pred(𝑅, 𝐴, 𝑌) ⊆ Pred(𝑅, 𝐴, 𝑡) ↔ Pred(𝑅, 𝐴, 𝑌) ⊆ Pred(𝑅, 𝐴, 𝑌)))
9	8	rspcev 3282	. . . . . . . 8 ⊢ ((𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) ∧ Pred(𝑅, 𝐴, 𝑌) ⊆ Pred(𝑅, 𝐴, 𝑌)) → ∃𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑌) ⊆ Pred(𝑅, 𝐴, 𝑡))
10		ssiun 4498	. . . . . . . 8 ⊢ (∃𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑌) ⊆ Pred(𝑅, 𝐴, 𝑡) → Pred(𝑅, 𝐴, 𝑌) ⊆ ∪ 𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡))
11	9, 10	syl 17	. . . . . . 7 ⊢ ((𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) ∧ Pred(𝑅, 𝐴, 𝑌) ⊆ Pred(𝑅, 𝐴, 𝑌)) → Pred(𝑅, 𝐴, 𝑌) ⊆ ∪ 𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡))
12	5, 6, 11	sylancl 693	. . . . . 6 ⊢ ((((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑖 ∈ ω) ∧ 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)) → Pred(𝑅, 𝐴, 𝑌) ⊆ ∪ 𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡))
13		fvex 6113	. . . . . . . 8 ⊢ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) ∈ V
14		setlikespec 5618	. . . . . . . . . . . . 13 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) → Pred(𝑅, 𝐴, 𝑋) ∈ V)
15		trpredlem1 30971	. . . . . . . . . . . . 13 ⊢ (Pred(𝑅, 𝐴, 𝑋) ∈ V → ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) ⊆ 𝐴)
16	14, 15	syl 17	. . . . . . . . . . . 12 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) → ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) ⊆ 𝐴)
17	16	sseld 3567	. . . . . . . . . . 11 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) → (𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) → 𝑡 ∈ 𝐴))
18		setlikespec 5618	. . . . . . . . . . . . 13 ⊢ ((𝑡 ∈ 𝐴 ∧ 𝑅 Se 𝐴) → Pred(𝑅, 𝐴, 𝑡) ∈ V)
19	18	expcom 450	. . . . . . . . . . . 12 ⊢ (𝑅 Se 𝐴 → (𝑡 ∈ 𝐴 → Pred(𝑅, 𝐴, 𝑡) ∈ V))
20	19	adantl 481	. . . . . . . . . . 11 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) → (𝑡 ∈ 𝐴 → Pred(𝑅, 𝐴, 𝑡) ∈ V))
21	17, 20	syld 46	. . . . . . . . . 10 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) → (𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) → Pred(𝑅, 𝐴, 𝑡) ∈ V))
22	21	ralrimiv 2948	. . . . . . . . 9 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) → ∀𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡) ∈ V)
23	22	ad2antrr 758	. . . . . . . 8 ⊢ ((((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑖 ∈ ω) ∧ 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)) → ∀𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡) ∈ V)
24		iunexg 7035	. . . . . . . 8 ⊢ ((((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) ∈ V ∧ ∀𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡) ∈ V) → ∪ 𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡) ∈ V)
25	13, 23, 24	sylancr 694	. . . . . . 7 ⊢ ((((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑖 ∈ ω) ∧ 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)) → ∪ 𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡) ∈ V)
26		nfcv 2751	. . . . . . . 8 ⊢ Ⅎ𝑓Pred(𝑅, 𝐴, 𝑋)
27		nfcv 2751	. . . . . . . 8 ⊢ Ⅎ𝑓𝑖
28		nfcv 2751	. . . . . . . 8 ⊢ Ⅎ𝑓∪ 𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡)
29		predeq3 5601	. . . . . . . . . . . 12 ⊢ (𝑦 = 𝑡 → Pred(𝑅, 𝐴, 𝑦) = Pred(𝑅, 𝐴, 𝑡))
30	29	cbviunv 4495	. . . . . . . . . . 11 ⊢ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦) = ∪ 𝑡 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑡)
31		iuneq1 4470	. . . . . . . . . . 11 ⊢ (𝑎 = 𝑓 → ∪ 𝑡 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑡) = ∪ 𝑡 ∈ 𝑓 Pred(𝑅, 𝐴, 𝑡))
32	30, 31	syl5eq 2656	. . . . . . . . . 10 ⊢ (𝑎 = 𝑓 → ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦) = ∪ 𝑡 ∈ 𝑓 Pred(𝑅, 𝐴, 𝑡))
33	32	cbvmptv 4678	. . . . . . . . 9 ⊢ (𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)) = (𝑓 ∈ V ↦ ∪ 𝑡 ∈ 𝑓 Pred(𝑅, 𝐴, 𝑡))
34		rdgeq1 7394	. . . . . . . . 9 ⊢ ((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)) = (𝑓 ∈ V ↦ ∪ 𝑡 ∈ 𝑓 Pred(𝑅, 𝐴, 𝑡)) → rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) = rec((𝑓 ∈ V ↦ ∪ 𝑡 ∈ 𝑓 Pred(𝑅, 𝐴, 𝑡)), Pred(𝑅, 𝐴, 𝑋)))
35		reseq1 5311	. . . . . . . . 9 ⊢ (rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) = rec((𝑓 ∈ V ↦ ∪ 𝑡 ∈ 𝑓 Pred(𝑅, 𝐴, 𝑡)), Pred(𝑅, 𝐴, 𝑋)) → (rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω) = (rec((𝑓 ∈ V ↦ ∪ 𝑡 ∈ 𝑓 Pred(𝑅, 𝐴, 𝑡)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω))
36	33, 34, 35	mp2b 10	. . . . . . . 8 ⊢ (rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω) = (rec((𝑓 ∈ V ↦ ∪ 𝑡 ∈ 𝑓 Pred(𝑅, 𝐴, 𝑡)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)
37		iuneq1 4470	. . . . . . . 8 ⊢ (𝑓 = ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) → ∪ 𝑡 ∈ 𝑓 Pred(𝑅, 𝐴, 𝑡) = ∪ 𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡))
38	26, 27, 28, 36, 37	frsucmpt 7420	. . . . . . 7 ⊢ ((𝑖 ∈ ω ∧ ∪ 𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡) ∈ V) → ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘suc 𝑖) = ∪ 𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡))
39	2, 25, 38	syl2anc 691	. . . . . 6 ⊢ ((((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑖 ∈ ω) ∧ 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)) → ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘suc 𝑖) = ∪ 𝑡 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)Pred(𝑅, 𝐴, 𝑡))
40	12, 39	sseqtr4d 3605	. . . . 5 ⊢ ((((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑖 ∈ ω) ∧ 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)) → Pred(𝑅, 𝐴, 𝑌) ⊆ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘suc 𝑖))
41		fveq2 6103	. . . . . . . . 9 ⊢ (𝑗 = suc 𝑖 → ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑗) = ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘suc 𝑖))
42	41	sseq2d 3596	. . . . . . . 8 ⊢ (𝑗 = suc 𝑖 → (Pred(𝑅, 𝐴, 𝑌) ⊆ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑗) ↔ Pred(𝑅, 𝐴, 𝑌) ⊆ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘suc 𝑖)))
43	42	rspcev 3282	. . . . . . 7 ⊢ ((suc 𝑖 ∈ ω ∧ Pred(𝑅, 𝐴, 𝑌) ⊆ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘suc 𝑖)) → ∃𝑗 ∈ ω Pred(𝑅, 𝐴, 𝑌) ⊆ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑗))
44		ssiun 4498	. . . . . . 7 ⊢ (∃𝑗 ∈ ω Pred(𝑅, 𝐴, 𝑌) ⊆ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑗) → Pred(𝑅, 𝐴, 𝑌) ⊆ ∪ 𝑗 ∈ ω ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑗))
45	43, 44	syl 17	. . . . . 6 ⊢ ((suc 𝑖 ∈ ω ∧ Pred(𝑅, 𝐴, 𝑌) ⊆ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘suc 𝑖)) → Pred(𝑅, 𝐴, 𝑌) ⊆ ∪ 𝑗 ∈ ω ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑗))
46		dftrpred2 30963	. . . . . 6 ⊢ TrPred(𝑅, 𝐴, 𝑋) = ∪ 𝑗 ∈ ω ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑗)
47	45, 46	syl6sseqr 3615	. . . . 5 ⊢ ((suc 𝑖 ∈ ω ∧ Pred(𝑅, 𝐴, 𝑌) ⊆ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘suc 𝑖)) → Pred(𝑅, 𝐴, 𝑌) ⊆ TrPred(𝑅, 𝐴, 𝑋))
48	4, 40, 47	syl2anc 691	. . . 4 ⊢ ((((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑖 ∈ ω) ∧ 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖)) → Pred(𝑅, 𝐴, 𝑌) ⊆ TrPred(𝑅, 𝐴, 𝑋))
49	48	ex 449	. . 3 ⊢ (((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) ∧ 𝑖 ∈ ω) → (𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) → Pred(𝑅, 𝐴, 𝑌) ⊆ TrPred(𝑅, 𝐴, 𝑋)))
50	49	rexlimdva 3013	. 2 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) → (∃𝑖 ∈ ω 𝑌 ∈ ((rec((𝑎 ∈ V ↦ ∪ 𝑦 ∈ 𝑎 Pred(𝑅, 𝐴, 𝑦)), Pred(𝑅, 𝐴, 𝑋)) ↾ ω)‘𝑖) → Pred(𝑅, 𝐴, 𝑌) ⊆ TrPred(𝑅, 𝐴, 𝑋)))
51	1, 50	syl5bi 231	1 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝑅 Se 𝐴) → (𝑌 ∈ TrPred(𝑅, 𝐴, 𝑋) → Pred(𝑅, 𝐴, 𝑌) ⊆ TrPred(𝑅, 𝐴, 𝑋)))

Syntax hints:   → wi 4   ∧ wa 383   = wceq 1475   ∈ wcel 1977  ∀wral 2896  ∃wrex 2897  Vcvv 3173   ⊆ wss 3540  ∪ ciun 4455   ↦ cmpt 4643   Se wse 4995   ↾ cres 5040  Predcpred 5596  suc csuc 5642  ‘cfv 5804  ωcom 6957  reccrdg 7392  TrPredctrpred 30961

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-se 4998  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-om 6958  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-trpred 30962

This theorem is referenced by:  trpredelss  30976  frmin  30983