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Theorem r1val3 9860
Description: The value of the cumulative hierarchy of sets function expressed in terms of rank. Theorem 15.18 of [Monk1] p. 113. (Contributed by NM, 30-Nov-2003.) (Revised by Mario Carneiro, 17-Nov-2014.)
Assertion
Ref Expression
r1val3 (𝐴 ∈ On → (𝑅1‘𝐴) = ∪ 𝑥 ∈ 𝐴 𝒫 {𝑦 ∣ (rank‘𝑦) ∈ 𝑥})
Distinct variable group:   𝑥,𝑦,𝐴

Proof of Theorem r1val3
StepHypRef Expression
1 r1fnon 9783 . . . . 5 𝑅1 Fn On
21fndmi 6651 . . . 4 dom 𝑅1 = On
32eleq2i 2855 . . 3 (𝐴 ∈ dom 𝑅1 ↔ 𝐴 ∈ On)
4 r1val1 9803 . . 3 (𝐴 ∈ dom 𝑅1 → (𝑅1‘𝐴) = ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
53, 4sylbir 238 . 2 (𝐴 ∈ On → (𝑅1‘𝐴) = ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥))
6 onelon 6393 . . . . 5 ((𝐴 ∈ On ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ On)
7 r1val2 9859 . . . . 5 (𝑥 ∈ On → (𝑅1‘𝑥) = {𝑦 ∣ (rank‘𝑦) ∈ 𝑥})
86, 7syl 18 . . . 4 ((𝐴 ∈ On ∧ 𝑥 ∈ 𝐴) → (𝑅1‘𝑥) = {𝑦 ∣ (rank‘𝑦) ∈ 𝑥})
98pweqd 4576 . . 3 ((𝐴 ∈ On ∧ 𝑥 ∈ 𝐴) → 𝒫 (𝑅1‘𝑥) = 𝒫 {𝑦 ∣ (rank‘𝑦) ∈ 𝑥})
109iuneq2dv 4978 . 2 (𝐴 ∈ On → ∪ 𝑥 ∈ 𝐴 𝒫 (𝑅1‘𝑥) = ∪ 𝑥 ∈ 𝐴 𝒫 {𝑦 ∣ (rank‘𝑦) ∈ 𝑥})
115, 10eqtrd 2798 1 (𝐴 ∈ On → (𝑅1‘𝐴) = ∪ 𝑥 ∈ 𝐴 𝒫 {𝑦 ∣ (rank‘𝑦) ∈ 𝑥})
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∧ wa 401   = wceq 1569   ∈ wcel 2146  {cab 2741  𝒫 cpw 4559  ∪ ciun 4953  dom cdm 5654  Oncon0 6368  ‘cfv 6546  𝑅1cr1 9776  rankcrnk 9777
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 1944  ax-6 2001  ax-7 2042  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2196  ax-12 2215  ax-ext 2735  ax-rep 5234  ax-sep 5251  ax-nul 5262  ax-pow 5330  ax-pr 5394  ax-un 7758  ax-reg 9596  ax-inf2 9652
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2101  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-reu 3369  df-rab 3416  df-v 3455  df-sbc 3742  df-csb 3851  df-ss 3900  df-pss 4016  df-dif 4049  df-in 4093  df-un 4153  df-nul 4281  df-if 4485  df-pw 4561  df-sn 4588  df-pr 4590  df-op 4838  df-uni 4870  df-int 4910  df-iun 4955  df-br 5106  df-opab 5170  df-mpt 5189  df-tr 5215  df-id 5549  df-eprel 5554  df-po 5562  df-so 5563  df-fr 5607  df-we 5609  df-xp 5660  df-rel 5661  df-cnv 5662  df-co 5663  df-dm 5664  df-rn 5665  df-res 5666  df-ima 5667  df-pred 6310  df-ord 6371  df-on 6372  df-lim 6373  df-suc 6374  df-iota 6500  df-fun 6548  df-fn 6549  df-f 6550  df-f1 6551  df-fo 6552  df-f1o 6553  df-fv 6554  df-ov 7430  df-om 7885  df-2nd 8009  df-frecs 8310  df-wrecs 8341  df-recs 8390  df-rdg 8429  df-r1 9778  df-rank 9779
This theorem is used by: (None)
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