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Mirrors > Home > MPE Home > Th. List > r1sucg | Structured version Visualization version GIF version |
Description: Value of the cumulative hierarchy of sets function at a successor ordinal. Part of Definition 9.9 of [TakeutiZaring] p. 76. (Contributed by Mario Carneiro, 16-Nov-2014.) |
Ref | Expression |
---|---|
r1sucg | ⊢ (𝐴 ∈ dom 𝑅1 → (𝑅1‘suc 𝐴) = 𝒫 (𝑅1‘𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rdgsucg 8462 | . . 3 ⊢ (𝐴 ∈ dom rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅) → (rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘suc 𝐴) = ((𝑥 ∈ V ↦ 𝒫 𝑥)‘(rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘𝐴))) | |
2 | df-r1 9802 | . . . 4 ⊢ 𝑅1 = rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅) | |
3 | 2 | dmeqi 5918 | . . 3 ⊢ dom 𝑅1 = dom rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅) |
4 | 1, 3 | eleq2s 2857 | . 2 ⊢ (𝐴 ∈ dom 𝑅1 → (rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘suc 𝐴) = ((𝑥 ∈ V ↦ 𝒫 𝑥)‘(rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘𝐴))) |
5 | 2 | fveq1i 6908 | . 2 ⊢ (𝑅1‘suc 𝐴) = (rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘suc 𝐴) |
6 | fvex 6920 | . . . 4 ⊢ (𝑅1‘𝐴) ∈ V | |
7 | pweq 4619 | . . . . 5 ⊢ (𝑥 = (𝑅1‘𝐴) → 𝒫 𝑥 = 𝒫 (𝑅1‘𝐴)) | |
8 | eqid 2735 | . . . . 5 ⊢ (𝑥 ∈ V ↦ 𝒫 𝑥) = (𝑥 ∈ V ↦ 𝒫 𝑥) | |
9 | 6 | pwex 5386 | . . . . 5 ⊢ 𝒫 (𝑅1‘𝐴) ∈ V |
10 | 7, 8, 9 | fvmpt 7016 | . . . 4 ⊢ ((𝑅1‘𝐴) ∈ V → ((𝑥 ∈ V ↦ 𝒫 𝑥)‘(𝑅1‘𝐴)) = 𝒫 (𝑅1‘𝐴)) |
11 | 6, 10 | ax-mp 5 | . . 3 ⊢ ((𝑥 ∈ V ↦ 𝒫 𝑥)‘(𝑅1‘𝐴)) = 𝒫 (𝑅1‘𝐴) |
12 | 2 | fveq1i 6908 | . . . 4 ⊢ (𝑅1‘𝐴) = (rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘𝐴) |
13 | 12 | fveq2i 6910 | . . 3 ⊢ ((𝑥 ∈ V ↦ 𝒫 𝑥)‘(𝑅1‘𝐴)) = ((𝑥 ∈ V ↦ 𝒫 𝑥)‘(rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘𝐴)) |
14 | 11, 13 | eqtr3i 2765 | . 2 ⊢ 𝒫 (𝑅1‘𝐴) = ((𝑥 ∈ V ↦ 𝒫 𝑥)‘(rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘𝐴)) |
15 | 4, 5, 14 | 3eqtr4g 2800 | 1 ⊢ (𝐴 ∈ dom 𝑅1 → (𝑅1‘suc 𝐴) = 𝒫 (𝑅1‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 ∈ wcel 2106 Vcvv 3478 ∅c0 4339 𝒫 cpw 4605 ↦ cmpt 5231 dom cdm 5689 suc csuc 6388 ‘cfv 6563 reccrdg 8448 𝑅1cr1 9800 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1908 ax-6 1965 ax-7 2005 ax-8 2108 ax-9 2116 ax-10 2139 ax-11 2155 ax-12 2175 ax-ext 2706 ax-sep 5302 ax-nul 5312 ax-pow 5371 ax-pr 5438 ax-un 7754 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1540 df-fal 1550 df-ex 1777 df-nf 1781 df-sb 2063 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2727 df-clel 2814 df-nfc 2890 df-ne 2939 df-ral 3060 df-rex 3069 df-reu 3379 df-rab 3434 df-v 3480 df-sbc 3792 df-csb 3909 df-dif 3966 df-un 3968 df-in 3970 df-ss 3980 df-pss 3983 df-nul 4340 df-if 4532 df-pw 4607 df-sn 4632 df-pr 4634 df-op 4638 df-uni 4913 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5583 df-eprel 5589 df-po 5597 df-so 5598 df-fr 5641 df-we 5643 df-xp 5695 df-rel 5696 df-cnv 5697 df-co 5698 df-dm 5699 df-rn 5700 df-res 5701 df-ima 5702 df-pred 6323 df-ord 6389 df-on 6390 df-lim 6391 df-suc 6392 df-iota 6516 df-fun 6565 df-fn 6566 df-f 6567 df-f1 6568 df-fo 6569 df-f1o 6570 df-fv 6571 df-ov 7434 df-2nd 8014 df-frecs 8305 df-wrecs 8336 df-recs 8410 df-rdg 8449 df-r1 9802 |
This theorem is referenced by: r1suc 9808 r1fin 9811 r1tr 9814 r1ordg 9816 r1pwss 9822 r1val1 9824 rankwflemb 9831 r1elwf 9834 rankr1ai 9836 rankr1bg 9841 pwwf 9845 unwf 9848 uniwf 9857 rankonidlem 9866 rankr1id 9900 |
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