Theorem r1val1 9701

Description: The value of the cumulative hierarchy of sets function expressed recursively. Theorem 7Q of [Enderton] p. 202. (Contributed by NM, 25-Nov-2003.) (Revised by Mario Carneiro, 17-Nov-2014.)

Assertion

Ref	Expression
r1val1	⊢ (𝐴 ∈ dom 𝑅1 → (𝑅1‘𝐴) = ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))

Distinct variable group:   𝑥,𝐴

Proof of Theorem r1val1

Step	Hyp	Ref	Expression
1		simpr 485	. . . . . 6 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = ∅) → 𝐴 = ∅)
2	1	fveq2d 6831	. . . . 5 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = ∅) → (𝑅1‘𝐴) = (𝑅1‘∅))
3		r10 9683	. . . . 5 ⊢ (𝑅1‘∅) = ∅
4	2, 3	eqtrdi 2790	. . . 4 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = ∅) → (𝑅1‘𝐴) = ∅)
5		0ss 4328	. . . . 5 ⊢ ∅ ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥)
6	5	a1i 11	. . . 4 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = ∅) → ∅ ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
7	4, 6	eqsstrd 3949	. . 3 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = ∅) → (𝑅1‘𝐴) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
8		nfv 1921	. . . . 5 ⊢ Ⅎ𝑥 𝐴 ∈ dom 𝑅1
9		nfcv 2901	. . . . . 6 ⊢ Ⅎ𝑥(𝑅1‘𝐴)
10		nfiu1 4957	. . . . . 6 ⊢ Ⅎ𝑥∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥)
11	9, 10	nfss 3908	. . . . 5 ⊢ Ⅎ𝑥(𝑅1‘𝐴) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥)
12		simpr 485	. . . . . . . . . 10 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = suc 𝑥) → 𝐴 = suc 𝑥)
13	12	fveq2d 6831	. . . . . . . . 9 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = suc 𝑥) → (𝑅1‘𝐴) = (𝑅1‘suc 𝑥))
14		eleq1 2827	. . . . . . . . . . . 12 ⊢ (𝐴 = suc 𝑥 → (𝐴 ∈ dom 𝑅1 ↔ suc 𝑥 ∈ dom 𝑅1))
15	14	biimpac 479	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = suc 𝑥) → suc 𝑥 ∈ dom 𝑅1)
16		r1funlim 9681	. . . . . . . . . . . . 13 ⊢ (Fun 𝑅1 ∧ Lim dom 𝑅1)
17	16	simpri 486	. . . . . . . . . . . 12 ⊢ Lim dom 𝑅1
18		limsuc 7789	. . . . . . . . . . . 12 ⊢ (Lim dom 𝑅1 → (𝑥 ∈ dom 𝑅1 ↔ suc 𝑥 ∈ dom 𝑅1))
19	17, 18	ax-mp 5	. . . . . . . . . . 11 ⊢ (𝑥 ∈ dom 𝑅1 ↔ suc 𝑥 ∈ dom 𝑅1)
20	15, 19	sylibr 235	. . . . . . . . . 10 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = suc 𝑥) → 𝑥 ∈ dom 𝑅1)
21		r1sucg 9684	. . . . . . . . . 10 ⊢ (𝑥 ∈ dom 𝑅1 → (𝑅1‘suc 𝑥) = 𝒫 (𝑅1‘𝑥))
22	20, 21	syl 17	. . . . . . . . 9 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = suc 𝑥) → (𝑅1‘suc 𝑥) = 𝒫 (𝑅1‘𝑥))
23	13, 22	eqtrd 2774	. . . . . . . 8 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = suc 𝑥) → (𝑅1‘𝐴) = 𝒫 (𝑅1‘𝑥))
24		vex 3435	. . . . . . . . . . 11 ⊢ 𝑥 ∈ V
25	24	sucid 6394	. . . . . . . . . 10 ⊢ 𝑥 ∈ suc 𝑥
26	25, 12	eleqtrrid 2846	. . . . . . . . 9 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = suc 𝑥) → 𝑥 ∈ 𝐴)
27		ssiun2 4977	. . . . . . . . 9 ⊢ (𝑥 ∈ 𝐴 → 𝒫 (𝑅1‘𝑥) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
28	26, 27	syl 17	. . . . . . . 8 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = suc 𝑥) → 𝒫 (𝑅1‘𝑥) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
29	23, 28	eqsstrd 3949	. . . . . . 7 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝐴 = suc 𝑥) → (𝑅1‘𝐴) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
30	29	ex 413	. . . . . 6 ⊢ (𝐴 ∈ dom 𝑅1 → (𝐴 = suc 𝑥 → (𝑅1‘𝐴) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥)))
31	30	a1d 25	. . . . 5 ⊢ (𝐴 ∈ dom 𝑅1 → (𝑥 ∈ On → (𝐴 = suc 𝑥 → (𝑅1‘𝐴) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))))
32	8, 11, 31	rexlimd 3246	. . . 4 ⊢ (𝐴 ∈ dom 𝑅1 → (∃𝑥 ∈ On 𝐴 = suc 𝑥 → (𝑅1‘𝐴) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥)))
33	32	imp 407	. . 3 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ ∃𝑥 ∈ On 𝐴 = suc 𝑥) → (𝑅1‘𝐴) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
34		r1limg 9686	. . . . 5 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1‘𝐴) = ∪ 𝑥 ∈ 𝐴 (𝑅1‘𝑥))
35		r1tr 9691	. . . . . . . . 9 ⊢ Tr (𝑅1‘𝑥)
36		dftr4 5185	. . . . . . . . 9 ⊢ (Tr (𝑅1‘𝑥) ↔ (𝑅1‘𝑥) ⊆ 𝒫 (𝑅1‘𝑥))
37	35, 36	mpbi 231	. . . . . . . 8 ⊢ (𝑅1‘𝑥) ⊆ 𝒫 (𝑅1‘𝑥)
38	37	a1i 11	. . . . . . 7 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1‘𝑥) ⊆ 𝒫 (𝑅1‘𝑥))
39	38	ralrimivw 3135	. . . . . 6 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → ∀𝑥 ∈ 𝐴 (𝑅1‘𝑥) ⊆ 𝒫 (𝑅1‘𝑥))
40		ss2iun 4940	. . . . . 6 ⊢ (∀𝑥 ∈ 𝐴 (𝑅1‘𝑥) ⊆ 𝒫 (𝑅1‘𝑥) → ∪ 𝑥 ∈ 𝐴 (𝑅1‘𝑥) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
41	39, 40	syl 17	. . . . 5 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → ∪ 𝑥 ∈ 𝐴 (𝑅1‘𝑥) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
42	34, 41	eqsstrd 3949	. . . 4 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1‘𝐴) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
43	42	adantrl 722	. . 3 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ (𝐴 ∈ V ∧ Lim 𝐴)) → (𝑅1‘𝐴) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
44		limord 6371	. . . . . . 7 ⊢ (Lim dom 𝑅1 → Ord dom 𝑅1)
45	17, 44	ax-mp 5	. . . . . 6 ⊢ Ord dom 𝑅1
46		ordsson 7726	. . . . . 6 ⊢ (Ord dom 𝑅1 → dom 𝑅1 ⊆ On)
47	45, 46	ax-mp 5	. . . . 5 ⊢ dom 𝑅1 ⊆ On
48	47	sseli 3911	. . . 4 ⊢ (𝐴 ∈ dom 𝑅1 → 𝐴 ∈ On)
49		onzsl 7786	. . . 4 ⊢ (𝐴 ∈ On ↔ (𝐴 = ∅ ∨ ∃𝑥 ∈ On 𝐴 = suc 𝑥 ∨ (𝐴 ∈ V ∧ Lim 𝐴)))
50	48, 49	sylib 219	. . 3 ⊢ (𝐴 ∈ dom 𝑅1 → (𝐴 = ∅ ∨ ∃𝑥 ∈ On 𝐴 = suc 𝑥 ∨ (𝐴 ∈ V ∧ Lim 𝐴)))
51	7, 33, 43, 50	mpjao3dan 1440	. 2 ⊢ (𝐴 ∈ dom 𝑅1 → (𝑅1‘𝐴) ⊆ ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
52		ordtr1 6354	. . . . . . . 8 ⊢ (Ord dom 𝑅1 → ((𝑥 ∈ 𝐴 ∧ 𝐴 ∈ dom 𝑅1) → 𝑥 ∈ dom 𝑅1))
53	45, 52	ax-mp 5	. . . . . . 7 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝐴 ∈ dom 𝑅1) → 𝑥 ∈ dom 𝑅1)
54	53	ancoms 459	. . . . . 6 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ dom 𝑅1)
55	54, 21	syl 17	. . . . 5 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → (𝑅1‘suc 𝑥) = 𝒫 (𝑅1‘𝑥))
56		simpr 485	. . . . . . 7 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ 𝐴)
57		ordelord 6332	. . . . . . . . . 10 ⊢ ((Ord dom 𝑅1 ∧ 𝐴 ∈ dom 𝑅1) → Ord 𝐴)
58	45, 57	mpan 696	. . . . . . . . 9 ⊢ (𝐴 ∈ dom 𝑅1 → Ord 𝐴)
59	58	adantr 481	. . . . . . . 8 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → Ord 𝐴)
60		ordelsuc 7760	. . . . . . . 8 ⊢ ((𝑥 ∈ 𝐴 ∧ Ord 𝐴) → (𝑥 ∈ 𝐴 ↔ suc 𝑥 ⊆ 𝐴))
61	56, 59, 60	syl2anc 590	. . . . . . 7 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → (𝑥 ∈ 𝐴 ↔ suc 𝑥 ⊆ 𝐴))
62	56, 61	mpbid 233	. . . . . 6 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → suc 𝑥 ⊆ 𝐴)
63	54, 19	sylib 219	. . . . . . 7 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → suc 𝑥 ∈ dom 𝑅1)
64		simpl 483	. . . . . . 7 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → 𝐴 ∈ dom 𝑅1)
65		r1ord3g 9694	. . . . . . 7 ⊢ ((suc 𝑥 ∈ dom 𝑅1 ∧ 𝐴 ∈ dom 𝑅1) → (suc 𝑥 ⊆ 𝐴 → (𝑅1‘suc 𝑥) ⊆ (𝑅1‘𝐴)))
66	63, 64, 65	syl2anc 590	. . . . . 6 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → (suc 𝑥 ⊆ 𝐴 → (𝑅1‘suc 𝑥) ⊆ (𝑅1‘𝐴)))
67	62, 66	mpd 15	. . . . 5 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → (𝑅1‘suc 𝑥) ⊆ (𝑅1‘𝐴))
68	55, 67	eqsstrrd 3950	. . . 4 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ 𝑥 ∈ 𝐴) → 𝒫 (𝑅1‘𝑥) ⊆ (𝑅1‘𝐴))
69	68	ralrimiva 3131	. . 3 ⊢ (𝐴 ∈ dom 𝑅1 → ∀𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥) ⊆ (𝑅1‘𝐴))
70		iunss 4974	. . 3 ⊢ (∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥) ⊆ (𝑅1‘𝐴) ↔ ∀𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥) ⊆ (𝑅1‘𝐴))
71	69, 70	sylibr 235	. 2 ⊢ (𝐴 ∈ dom 𝑅1 → ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥) ⊆ (𝑅1‘𝐴))
72	51, 71	eqssd 3932	1 ⊢ (𝐴 ∈ dom 𝑅1 → (𝑅1‘𝐴) = ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))

Syntax hints:   → wi 4   ↔ wb 207   ∧ wa 396   ∨ w3o 1091   = wceq 1547   ∈ wcel 2119  ∀wral 3053  ∃wrex 3063  Vcvv 3431   ⊆ wss 3883  ∅c0 4261  𝒫 cpw 4529  ∪ ciun 4921  Tr wtr 5179  dom cdm 5618  Ord word 6309  Oncon0 6310  Lim wlim 6311  suc csuc 6312  Fun wfun 6479  ‘cfv 6485  𝑅₁cr1 9677

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2711  ax-sep 5218  ax-nul 5228  ax-pow 5294  ax-pr 5362  ax-un 7678

This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3or 1093  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2543  df-eu 2573  df-clab 2718  df-cleq 2731  df-clel 2814  df-nfc 2888  df-ne 2935  df-ral 3054  df-rex 3064  df-reu 3345  df-rab 3392  df-v 3433  df-sbc 3724  df-csb 3832  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3903  df-nul 4262  df-if 4455  df-pw 4531  df-sn 4556  df-pr 4558  df-op 4562  df-uni 4839  df-iun 4923  df-br 5073  df-opab 5135  df-mpt 5154  df-tr 5180  df-id 5513  df-eprel 5518  df-po 5526  df-so 5527  df-fr 5571  df-we 5573  df-xp 5624  df-rel 5625  df-cnv 5626  df-co 5627  df-dm 5628  df-rn 5629  df-res 5630  df-ima 5631  df-pred 6252  df-ord 6313  df-on 6314  df-lim 6315  df-suc 6316  df-iota 6441  df-fun 6487  df-fn 6488  df-f 6489  df-f1 6490  df-fo 6491  df-f1o 6492  df-fv 6493  df-ov 7359  df-om 7807  df-2nd 7932  df-frecs 8221  df-wrecs 8252  df-recs 8301  df-rdg 8339  df-r1 9679

This theorem is referenced by:  rankr1ai  9713  r1val3  9753