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Theorem r1limg 9247
 Description: Value of the cumulative hierarchy of sets function at a limit ordinal. Part of Definition 9.9 of [TakeutiZaring] p. 76. (Contributed by Mario Carneiro, 16-Nov-2014.)
Assertion
Ref Expression
r1limg ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1𝐴) = 𝑥𝐴 (𝑅1𝑥))
Distinct variable group:   𝑥,𝐴

Proof of Theorem r1limg
Dummy variable 𝑦 is distinct from all other variables.
StepHypRef Expression
1 df-r1 9240 . . . . 5 𝑅1 = rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅)
21dmeqi 5751 . . . 4 dom 𝑅1 = dom rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅)
32eleq2i 2844 . . 3 (𝐴 ∈ dom 𝑅1𝐴 ∈ dom rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅))
4 rdglimg 8078 . . 3 ((𝐴 ∈ dom rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) ∧ Lim 𝐴) → (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅)‘𝐴) = (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) “ 𝐴))
53, 4sylanb 584 . 2 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅)‘𝐴) = (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) “ 𝐴))
61fveq1i 6665 . 2 (𝑅1𝐴) = (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅)‘𝐴)
7 r1funlim 9242 . . . . 5 (Fun 𝑅1 ∧ Lim dom 𝑅1)
87simpli 487 . . . 4 Fun 𝑅1
9 funiunfv 7006 . . . 4 (Fun 𝑅1 𝑥𝐴 (𝑅1𝑥) = (𝑅1𝐴))
108, 9ax-mp 5 . . 3 𝑥𝐴 (𝑅1𝑥) = (𝑅1𝐴)
111imaeq1i 5904 . . . 4 (𝑅1𝐴) = (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) “ 𝐴)
1211unieqi 4815 . . 3 (𝑅1𝐴) = (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) “ 𝐴)
1310, 12eqtri 2782 . 2 𝑥𝐴 (𝑅1𝑥) = (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) “ 𝐴)
145, 6, 133eqtr4g 2819 1 ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1𝐴) = 𝑥𝐴 (𝑅1𝑥))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ∧ wa 399   = wceq 1539   ∈ wcel 2112  Vcvv 3410  ∅c0 4228  𝒫 cpw 4498  ∪ cuni 4802  ∪ ciun 4887   ↦ cmpt 5117  dom cdm 5529   “ cima 5532  Lim wlim 6176  Fun wfun 6335  ‘cfv 6341  reccrdg 8062  𝑅1cr1 9238 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1912  ax-6 1971  ax-7 2016  ax-8 2114  ax-9 2122  ax-10 2143  ax-11 2159  ax-12 2176  ax-ext 2730  ax-sep 5174  ax-nul 5181  ax-pr 5303  ax-un 7466 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1086  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2071  df-mo 2558  df-eu 2589  df-clab 2737  df-cleq 2751  df-clel 2831  df-nfc 2902  df-ne 2953  df-ral 3076  df-rex 3077  df-reu 3078  df-rab 3080  df-v 3412  df-sbc 3700  df-csb 3809  df-dif 3864  df-un 3866  df-in 3868  df-ss 3878  df-pss 3880  df-nul 4229  df-if 4425  df-pw 4500  df-sn 4527  df-pr 4529  df-tp 4531  df-op 4533  df-uni 4803  df-iun 4889  df-br 5038  df-opab 5100  df-mpt 5118  df-tr 5144  df-id 5435  df-eprel 5440  df-po 5448  df-so 5449  df-fr 5488  df-we 5490  df-xp 5535  df-rel 5536  df-cnv 5537  df-co 5538  df-dm 5539  df-rn 5540  df-res 5541  df-ima 5542  df-pred 6132  df-ord 6178  df-on 6179  df-lim 6180  df-suc 6181  df-iota 6300  df-fun 6343  df-fn 6344  df-f 6345  df-f1 6346  df-fo 6347  df-f1o 6348  df-fv 6349  df-wrecs 7964  df-recs 8025  df-rdg 8063  df-r1 9240 This theorem is referenced by:  r1lim  9248  r1tr  9252  r1ordg  9254  r1pwss  9260  r1val1  9262
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