Theorem r1limg 9840

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) → (𝑅1‘𝐴) = ∪ 𝑥 ∈ 𝐴 (𝑅1‘𝑥))

Distinct variable group:   𝑥,𝐴

Proof of Theorem r1limg

Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-r1 9833	. . . . 5 ⊢ 𝑅1 = rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅)
2	1	dmeqi 5929	. . . 4 ⊢ dom 𝑅1 = dom rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅)
3	2	eleq2i 2836	. . 3 ⊢ (𝐴 ∈ dom 𝑅1 ↔ 𝐴 ∈ dom rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅))
4		rdglimg 8481	. . 3 ⊢ ((𝐴 ∈ dom rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) ∧ Lim 𝐴) → (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅)‘𝐴) = ∪ (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) “ 𝐴))
5	3, 4	sylanb 580	. 2 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅)‘𝐴) = ∪ (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) “ 𝐴))
6	1	fveq1i 6921	. 2 ⊢ (𝑅1‘𝐴) = (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅)‘𝐴)
7		r1funlim 9835	. . . . 5 ⊢ (Fun 𝑅1 ∧ Lim dom 𝑅1)
8	7	simpli 483	. . . 4 ⊢ Fun 𝑅1
9		funiunfv 7285	. . . 4 ⊢ (Fun 𝑅1 → ∪ 𝑥 ∈ 𝐴 (𝑅1‘𝑥) = ∪ (𝑅1 “ 𝐴))
10	8, 9	ax-mp 5	. . 3 ⊢ ∪ 𝑥 ∈ 𝐴 (𝑅1‘𝑥) = ∪ (𝑅1 “ 𝐴)
11	1	imaeq1i 6086	. . . 4 ⊢ (𝑅1 “ 𝐴) = (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) “ 𝐴)
12	11	unieqi 4943	. . 3 ⊢ ∪ (𝑅1 “ 𝐴) = ∪ (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) “ 𝐴)
13	10, 12	eqtri 2768	. 2 ⊢ ∪ 𝑥 ∈ 𝐴 (𝑅1‘𝑥) = ∪ (rec((𝑦 ∈ V ↦ 𝒫 𝑦), ∅) “ 𝐴)
14	5, 6, 13	3eqtr4g 2805	1 ⊢ ((𝐴 ∈ dom 𝑅1 ∧ Lim 𝐴) → (𝑅1‘𝐴) = ∪ 𝑥 ∈ 𝐴 (𝑅1‘𝑥))

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1537   ∈ wcel 2108  Vcvv 3488  ∅c0 4352  𝒫 cpw 4622  ∪ cuni 4931  ∪ ciun 5015   ↦ cmpt 5249  dom cdm 5700   “ cima 5703  Lim wlim 6396  Fun wfun 6567  ‘cfv 6573  reccrdg 8465  𝑅₁cr1 9831

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-sep 5317  ax-nul 5324  ax-pr 5447  ax-un 7770

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3or 1088  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-ne 2947  df-ral 3068  df-rex 3077  df-reu 3389  df-rab 3444  df-v 3490  df-sbc 3805  df-csb 3922  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-pss 3996  df-nul 4353  df-if 4549  df-pw 4624  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-iun 5017  df-br 5167  df-opab 5229  df-mpt 5250  df-tr 5284  df-id 5593  df-eprel 5599  df-po 5607  df-so 5608  df-fr 5652  df-we 5654  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-rn 5711  df-res 5712  df-ima 5713  df-pred 6332  df-ord 6398  df-on 6399  df-lim 6400  df-suc 6401  df-iota 6525  df-fun 6575  df-fn 6576  df-f 6577  df-f1 6578  df-fo 6579  df-f1o 6580  df-fv 6581  df-ov 7451  df-2nd 8031  df-frecs 8322  df-wrecs 8353  df-recs 8427  df-rdg 8466  df-r1 9833

This theorem is referenced by:  r1lim  9841  r1tr  9845  r1ordg  9847  r1pwss  9853  r1val1  9855