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Theorem r1val1 8532
 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 476 . . . . . 6 ((𝐴 ∈ dom 𝑅1𝐴 = ∅) → 𝐴 = ∅)
21fveq2d 6107 . . . . 5 ((𝐴 ∈ dom 𝑅1𝐴 = ∅) → (𝑅1𝐴) = (𝑅1‘∅))
3 r10 8514 . . . . 5 (𝑅1‘∅) = ∅
42, 3syl6eq 2660 . . . 4 ((𝐴 ∈ dom 𝑅1𝐴 = ∅) → (𝑅1𝐴) = ∅)
5 0ss 3924 . . . . 5 ∅ ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥)
65a1i 11 . . . 4 ((𝐴 ∈ dom 𝑅1𝐴 = ∅) → ∅ ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
74, 6eqsstrd 3602 . . 3 ((𝐴 ∈ dom 𝑅1𝐴 = ∅) → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
8 nfv 1830 . . . . 5 𝑥 𝐴 ∈ dom 𝑅1
9 nfcv 2751 . . . . . 6 𝑥(𝑅1𝐴)
10 nfiu1 4486 . . . . . 6 𝑥 𝑥𝐴 𝒫 (𝑅1𝑥)
119, 10nfss 3561 . . . . 5 𝑥(𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥)
12 simpr 476 . . . . . . . . . 10 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → 𝐴 = suc 𝑥)
1312fveq2d 6107 . . . . . . . . 9 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → (𝑅1𝐴) = (𝑅1‘suc 𝑥))
14 eleq1 2676 . . . . . . . . . . . 12 (𝐴 = suc 𝑥 → (𝐴 ∈ dom 𝑅1 ↔ suc 𝑥 ∈ dom 𝑅1))
1514biimpac 502 . . . . . . . . . . 11 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → suc 𝑥 ∈ dom 𝑅1)
16 r1funlim 8512 . . . . . . . . . . . . 13 (Fun 𝑅1 ∧ Lim dom 𝑅1)
1716simpri 477 . . . . . . . . . . . 12 Lim dom 𝑅1
18 limsuc 6941 . . . . . . . . . . . 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 223 . . . . . . . . . 10 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → 𝑥 ∈ dom 𝑅1)
21 r1sucg 8515 . . . . . . . . . 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 2644 . . . . . . . 8 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → (𝑅1𝐴) = 𝒫 (𝑅1𝑥))
24 vex 3176 . . . . . . . . . . 11 𝑥 ∈ V
2524sucid 5721 . . . . . . . . . 10 𝑥 ∈ suc 𝑥
2625, 12syl5eleqr 2695 . . . . . . . . 9 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → 𝑥𝐴)
27 ssiun2 4499 . . . . . . . . 9 (𝑥𝐴 → 𝒫 (𝑅1𝑥) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
2826, 27syl 17 . . . . . . . 8 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → 𝒫 (𝑅1𝑥) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
2923, 28eqsstrd 3602 . . . . . . 7 ((𝐴 ∈ dom 𝑅1𝐴 = suc 𝑥) → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
3029ex 449 . . . . . 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 3008 . . . 4 (𝐴 ∈ dom 𝑅1 → (∃𝑥 ∈ On 𝐴 = suc 𝑥 → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥)))
3332imp 444 . . 3 ((𝐴 ∈ dom 𝑅1 ∧ ∃𝑥 ∈ On 𝐴 = suc 𝑥) → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
34 r1limg 8517 . . . . 5 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1𝐴) = 𝑥𝐴 (𝑅1𝑥))
35 r1tr 8522 . . . . . . . . 9 Tr (𝑅1𝑥)
36 dftr4 4685 . . . . . . . . 9 (Tr (𝑅1𝑥) ↔ (𝑅1𝑥) ⊆ 𝒫 (𝑅1𝑥))
3735, 36mpbi 219 . . . . . . . 8 (𝑅1𝑥) ⊆ 𝒫 (𝑅1𝑥)
3837a1i 11 . . . . . . 7 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1𝑥) ⊆ 𝒫 (𝑅1𝑥))
3938ralrimivw 2950 . . . . . 6 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → ∀𝑥𝐴 (𝑅1𝑥) ⊆ 𝒫 (𝑅1𝑥))
40 ss2iun 4472 . . . . . 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 3602 . . . 4 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
4342adantrl 748 . . 3 ((𝐴 ∈ dom 𝑅1 ∧ (𝐴 ∈ V ∧ Lim 𝐴)) → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
44 limord 5701 . . . . . . 7 (Lim dom 𝑅1 → Ord dom 𝑅1)
4517, 44ax-mp 5 . . . . . 6 Ord dom 𝑅1
46 ordsson 6881 . . . . . 6 (Ord dom 𝑅1 → dom 𝑅1 ⊆ On)
4745, 46ax-mp 5 . . . . 5 dom 𝑅1 ⊆ On
4847sseli 3564 . . . 4 (𝐴 ∈ dom 𝑅1𝐴 ∈ On)
49 onzsl 6938 . . . 4 (𝐴 ∈ On ↔ (𝐴 = ∅ ∨ ∃𝑥 ∈ On 𝐴 = suc 𝑥 ∨ (𝐴 ∈ V ∧ Lim 𝐴)))
5048, 49sylib 207 . . 3 (𝐴 ∈ dom 𝑅1 → (𝐴 = ∅ ∨ ∃𝑥 ∈ On 𝐴 = suc 𝑥 ∨ (𝐴 ∈ V ∧ Lim 𝐴)))
517, 33, 43, 50mpjao3dan 1387 . 2 (𝐴 ∈ dom 𝑅1 → (𝑅1𝐴) ⊆ 𝑥𝐴 𝒫 (𝑅1𝑥))
52 ordtr1 5684 . . . . . . . 8 (Ord dom 𝑅1 → ((𝑥𝐴𝐴 ∈ dom 𝑅1) → 𝑥 ∈ dom 𝑅1))
5345, 52ax-mp 5 . . . . . . 7 ((𝑥𝐴𝐴 ∈ dom 𝑅1) → 𝑥 ∈ dom 𝑅1)
5453ancoms 468 . . . . . 6 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → 𝑥 ∈ dom 𝑅1)
5554, 21syl 17 . . . . 5 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → (𝑅1‘suc 𝑥) = 𝒫 (𝑅1𝑥))
56 simpr 476 . . . . . . 7 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → 𝑥𝐴)
57 ordelord 5662 . . . . . . . . . 10 ((Ord dom 𝑅1𝐴 ∈ dom 𝑅1) → Ord 𝐴)
5845, 57mpan 702 . . . . . . . . 9 (𝐴 ∈ dom 𝑅1 → Ord 𝐴)
5958adantr 480 . . . . . . . 8 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → Ord 𝐴)
60 ordelsuc 6912 . . . . . . . 8 ((𝑥𝐴 ∧ Ord 𝐴) → (𝑥𝐴 ↔ suc 𝑥𝐴))
6156, 59, 60syl2anc 691 . . . . . . 7 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → (𝑥𝐴 ↔ suc 𝑥𝐴))
6256, 61mpbid 221 . . . . . 6 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → suc 𝑥𝐴)
6354, 19sylib 207 . . . . . . 7 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → suc 𝑥 ∈ dom 𝑅1)
64 simpl 472 . . . . . . 7 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → 𝐴 ∈ dom 𝑅1)
65 r1ord3g 8525 . . . . . . 7 ((suc 𝑥 ∈ dom 𝑅1𝐴 ∈ dom 𝑅1) → (suc 𝑥𝐴 → (𝑅1‘suc 𝑥) ⊆ (𝑅1𝐴)))
6663, 64, 65syl2anc 691 . . . . . 6 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → (suc 𝑥𝐴 → (𝑅1‘suc 𝑥) ⊆ (𝑅1𝐴)))
6762, 66mpd 15 . . . . 5 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → (𝑅1‘suc 𝑥) ⊆ (𝑅1𝐴))
6855, 67eqsstr3d 3603 . . . 4 ((𝐴 ∈ dom 𝑅1𝑥𝐴) → 𝒫 (𝑅1𝑥) ⊆ (𝑅1𝐴))
6968ralrimiva 2949 . . 3 (𝐴 ∈ dom 𝑅1 → ∀𝑥𝐴 𝒫 (𝑅1𝑥) ⊆ (𝑅1𝐴))
70 iunss 4497 . . 3 ( 𝑥𝐴 𝒫 (𝑅1𝑥) ⊆ (𝑅1𝐴) ↔ ∀𝑥𝐴 𝒫 (𝑅1𝑥) ⊆ (𝑅1𝐴))
7169, 70sylibr 223 . 2 (𝐴 ∈ dom 𝑅1 𝑥𝐴 𝒫 (𝑅1𝑥) ⊆ (𝑅1𝐴))
7251, 71eqssd 3585 1 (𝐴 ∈ dom 𝑅1 → (𝑅1𝐴) = 𝑥𝐴 𝒫 (𝑅1𝑥))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   ∨ w3o 1030   = wceq 1475   ∈ wcel 1977  ∀wral 2896  ∃wrex 2897  Vcvv 3173   ⊆ wss 3540  ∅c0 3874  𝒫 cpw 4108  ∪ ciun 4455  Tr wtr 4680  dom cdm 5038  Ord word 5639  Oncon0 5640  Lim wlim 5641  suc csuc 5642  Fun wfun 5798  ‘cfv 5804  𝑅1cr1 8508 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-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-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-r1 8510 This theorem is referenced by:  rankr1ai  8544  r1val3  8584
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