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Theorem r1val1 8601
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 → (𝑅1𝐴) = 𝑥𝐴 𝒫 (𝑅1𝑥))
Distinct variable group:   𝑥,𝐴

Proof of Theorem r1val1
StepHypRef Expression
1 simpr 477 . . . . . 6 ((𝐴 ∈ dom 𝑅1𝐴 = ∅) → 𝐴 = ∅)
21fveq2d 6157 . . . . 5 ((𝐴 ∈ dom 𝑅1𝐴 = ∅) → (𝑅1𝐴) = (𝑅1‘∅))
3 r10 8583 . . . . 5 (𝑅1‘∅) = ∅
42, 3syl6eq 2671 . . . 4 ((𝐴 ∈ dom 𝑅1𝐴 = ∅) → (𝑅1𝐴) = ∅)
5 0ss 3949 . . . . 5 ∅ ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥)
65a1i 11 . . . 4 ((𝐴 ∈ dom 𝑅1𝐴 = ∅) → ∅ ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
74, 6eqsstrd 3623 . . 3 ((𝐴 ∈ dom 𝑅1𝐴 = ∅) → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
8 nfv 1840 . . . . 5 𝑥 𝐴 ∈ dom 𝑅1
9 nfcv 2761 . . . . . 6 𝑥(𝑅1𝐴)
10 nfiu1 4521 . . . . . 6 𝑥 𝑥𝐴 𝒫 (𝑅1𝑥)
119, 10nfss 3580 . . . . 5 𝑥(𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥)
12 simpr 477 . . . . . . . . . 10 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → 𝐴 = suc 𝑥)
1312fveq2d 6157 . . . . . . . . 9 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → (𝑅1𝐴) = (𝑅1‘suc 𝑥))
14 eleq1 2686 . . . . . . . . . . . 12 (𝐴 = suc 𝑥 → (𝐴 ∈ dom 𝑅1 ↔ suc 𝑥 ∈ dom 𝑅1))
1514biimpac 503 . . . . . . . . . . 11 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → suc 𝑥 ∈ dom 𝑅1)
16 r1funlim 8581 . . . . . . . . . . . . 13 (Fun 𝑅1 ∧ Lim dom 𝑅1)
1716simpri 478 . . . . . . . . . . . 12 Lim dom 𝑅1
18 limsuc 7003 . . . . . . . . . . . 12 (Lim dom 𝑅1 → (𝑥 ∈ dom 𝑅1 ↔ suc 𝑥 ∈ dom 𝑅1))
1917, 18ax-mp 5 . . . . . . . . . . 11 (𝑥 ∈ dom 𝑅1 ↔ suc 𝑥 ∈ dom 𝑅1)
2015, 19sylibr 224 . . . . . . . . . 10 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → 𝑥 ∈ dom 𝑅1)
21 r1sucg 8584 . . . . . . . . . 10 (𝑥 ∈ dom 𝑅1 → (𝑅1‘suc 𝑥) = 𝒫 (𝑅1𝑥))
2220, 21syl 17 . . . . . . . . 9 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → (𝑅1‘suc 𝑥) = 𝒫 (𝑅1𝑥))
2313, 22eqtrd 2655 . . . . . . . 8 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → (𝑅1𝐴) = 𝒫 (𝑅1𝑥))
24 vex 3192 . . . . . . . . . . 11 𝑥 ∈ V
2524sucid 5768 . . . . . . . . . 10 𝑥 ∈ suc 𝑥
2625, 12syl5eleqr 2705 . . . . . . . . 9 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → 𝑥𝐴)
27 ssiun2 4534 . . . . . . . . 9 (𝑥𝐴 → 𝒫 (𝑅1𝑥) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
2826, 27syl 17 . . . . . . . 8 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → 𝒫 (𝑅1𝑥) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
2923, 28eqsstrd 3623 . . . . . . 7 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
3029ex 450 . . . . . 6 (𝐴 ∈ dom 𝑅1 → (𝐴 = suc 𝑥 → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥)))
3130a1d 25 . . . . 5 (𝐴 ∈ dom 𝑅1 → (𝑥 ∈ On → (𝐴 = suc 𝑥 → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))))
328, 11, 31rexlimd 3020 . . . 4 (𝐴 ∈ dom 𝑅1 → (∃𝑥 ∈ On 𝐴 = suc 𝑥 → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥)))
3332imp 445 . . 3 ((𝐴 ∈ dom 𝑅1 ∧ ∃𝑥 ∈ On 𝐴 = suc 𝑥) → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
34 r1limg 8586 . . . . 5 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1𝐴) = 𝑥𝐴 (𝑅1𝑥))
35 r1tr 8591 . . . . . . . . 9 Tr (𝑅1𝑥)
36 dftr4 4722 . . . . . . . . 9 (Tr (𝑅1𝑥) ↔ (𝑅1𝑥) ⊆ 𝒫 (𝑅1𝑥))
3735, 36mpbi 220 . . . . . . . 8 (𝑅1𝑥) ⊆ 𝒫 (𝑅1𝑥)
3837a1i 11 . . . . . . 7 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1𝑥) ⊆ 𝒫 (𝑅1𝑥))
3938ralrimivw 2962 . . . . . 6 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → ∀𝑥𝐴 (𝑅1𝑥) ⊆ 𝒫 (𝑅1𝑥))
40 ss2iun 4507 . . . . . 6 (∀𝑥𝐴 (𝑅1𝑥) ⊆ 𝒫 (𝑅1𝑥) → 𝑥𝐴 (𝑅1𝑥) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
4139, 40syl 17 . . . . 5 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → 𝑥𝐴 (𝑅1𝑥) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
4234, 41eqsstrd 3623 . . . 4 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
4342adantrl 751 . . 3 ((𝐴 ∈ dom 𝑅1 ∧ (𝐴 ∈ V ∧ Lim 𝐴)) → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
44 limord 5748 . . . . . . 7 (Lim dom 𝑅1 → Ord dom 𝑅1)
4517, 44ax-mp 5 . . . . . 6 Ord dom 𝑅1
46 ordsson 6943 . . . . . 6 (Ord dom 𝑅1 → dom 𝑅1 ⊆ On)
4745, 46ax-mp 5 . . . . 5 dom 𝑅1 ⊆ On
4847sseli 3583 . . . 4 (𝐴 ∈ dom 𝑅1𝐴 ∈ On)
49 onzsl 7000 . . . 4 (𝐴 ∈ On ↔ (𝐴 = ∅ ∨ ∃𝑥 ∈ On 𝐴 = suc 𝑥 ∨ (𝐴 ∈ V ∧ Lim 𝐴)))
5048, 49sylib 208 . . 3 (𝐴 ∈ dom 𝑅1 → (𝐴 = ∅ ∨ ∃𝑥 ∈ On 𝐴 = suc 𝑥 ∨ (𝐴 ∈ V ∧ Lim 𝐴)))
517, 33, 43, 50mpjao3dan 1392 . 2 (𝐴 ∈ dom 𝑅1 → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
52 ordtr1 5731 . . . . . . . 8 (Ord dom 𝑅1 → ((𝑥𝐴𝐴 ∈ dom 𝑅1) → 𝑥 ∈ dom 𝑅1))
5345, 52ax-mp 5 . . . . . . 7 ((𝑥𝐴𝐴 ∈ dom 𝑅1) → 𝑥 ∈ dom 𝑅1)
5453ancoms 469 . . . . . 6 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → 𝑥 ∈ dom 𝑅1)
5554, 21syl 17 . . . . 5 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → (𝑅1‘suc 𝑥) = 𝒫 (𝑅1𝑥))
56 simpr 477 . . . . . . 7 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → 𝑥𝐴)
57 ordelord 5709 . . . . . . . . . 10 ((Ord dom 𝑅1𝐴 ∈ dom 𝑅1) → Ord 𝐴)
5845, 57mpan 705 . . . . . . . . 9 (𝐴 ∈ dom 𝑅1 → Ord 𝐴)
5958adantr 481 . . . . . . . 8 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → Ord 𝐴)
60 ordelsuc 6974 . . . . . . . 8 ((𝑥𝐴 ∧ Ord 𝐴) → (𝑥𝐴 ↔ suc 𝑥𝐴))
6156, 59, 60syl2anc 692 . . . . . . 7 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → (𝑥𝐴 ↔ suc 𝑥𝐴))
6256, 61mpbid 222 . . . . . 6 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → suc 𝑥𝐴)
6354, 19sylib 208 . . . . . . 7 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → suc 𝑥 ∈ dom 𝑅1)
64 simpl 473 . . . . . . 7 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → 𝐴 ∈ dom 𝑅1)
65 r1ord3g 8594 . . . . . . 7 ((suc 𝑥 ∈ dom 𝑅1𝐴 ∈ dom 𝑅1) → (suc 𝑥𝐴 → (𝑅1‘suc 𝑥) ⊆ (𝑅1𝐴)))
6663, 64, 65syl2anc 692 . . . . . 6 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → (suc 𝑥𝐴 → (𝑅1‘suc 𝑥) ⊆ (𝑅1𝐴)))
6762, 66mpd 15 . . . . 5 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → (𝑅1‘suc 𝑥) ⊆ (𝑅1𝐴))
6855, 67eqsstr3d 3624 . . . 4 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → 𝒫 (𝑅1𝑥) ⊆ (𝑅1𝐴))
6968ralrimiva 2961 . . 3 (𝐴 ∈ dom 𝑅1 → ∀𝑥𝐴 𝒫 (𝑅1𝑥) ⊆ (𝑅1𝐴))
70 iunss 4532 . . 3 ( 𝑥𝐴 𝒫 (𝑅1𝑥) ⊆ (𝑅1𝐴) ↔ ∀𝑥𝐴 𝒫 (𝑅1𝑥) ⊆ (𝑅1𝐴))
7169, 70sylibr 224 . 2 (𝐴 ∈ dom 𝑅1 𝑥𝐴 𝒫 (𝑅1𝑥) ⊆ (𝑅1𝐴))
7251, 71eqssd 3604 1 (𝐴 ∈ dom 𝑅1 → (𝑅1𝐴) = 𝑥𝐴 𝒫 (𝑅1𝑥))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384  w3o 1035   = wceq 1480  wcel 1987  wral 2907  wrex 2908  Vcvv 3189  wss 3559  c0 3896  𝒫 cpw 4135   ciun 4490  Tr wtr 4717  dom cdm 5079  Ord word 5686  Oncon0 5687  Lim wlim 5688  suc csuc 5689  Fun wfun 5846  cfv 5852  𝑅1cr1 8577
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-sep 4746  ax-nul 4754  ax-pow 4808  ax-pr 4872  ax-un 6909
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2912  df-rex 2913  df-reu 2914  df-rab 2916  df-v 3191  df-sbc 3422  df-csb 3519  df-dif 3562  df-un 3564  df-in 3566  df-ss 3573  df-pss 3575  df-nul 3897  df-if 4064  df-pw 4137  df-sn 4154  df-pr 4156  df-tp 4158  df-op 4160  df-uni 4408  df-iun 4492  df-br 4619  df-opab 4679  df-mpt 4680  df-tr 4718  df-eprel 4990  df-id 4994  df-po 5000  df-so 5001  df-fr 5038  df-we 5040  df-xp 5085  df-rel 5086  df-cnv 5087  df-co 5088  df-dm 5089  df-rn 5090  df-res 5091  df-ima 5092  df-pred 5644  df-ord 5690  df-on 5691  df-lim 5692  df-suc 5693  df-iota 5815  df-fun 5854  df-fn 5855  df-f 5856  df-f1 5857  df-fo 5858  df-f1o 5859  df-fv 5860  df-om 7020  df-wrecs 7359  df-recs 7420  df-rdg 7458  df-r1 8579
This theorem is referenced by:  rankr1ai  8613  r1val3  8653
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