Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
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 8242 | . . 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 9510 | . . . 4 ⊢ 𝑅1 = rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅) | |
3 | 2 | dmeqi 5807 | . . 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 6768 | . 2 ⊢ (𝑅1‘suc 𝐴) = (rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘suc 𝐴) |
6 | fvex 6780 | . . . 4 ⊢ (𝑅1‘𝐴) ∈ V | |
7 | pweq 4550 | . . . . 5 ⊢ (𝑥 = (𝑅1‘𝐴) → 𝒫 𝑥 = 𝒫 (𝑅1‘𝐴)) | |
8 | eqid 2738 | . . . . 5 ⊢ (𝑥 ∈ V ↦ 𝒫 𝑥) = (𝑥 ∈ V ↦ 𝒫 𝑥) | |
9 | 6 | pwex 5302 | . . . . 5 ⊢ 𝒫 (𝑅1‘𝐴) ∈ V |
10 | 7, 8, 9 | fvmpt 6868 | . . . 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 6768 | . . . 4 ⊢ (𝑅1‘𝐴) = (rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘𝐴) |
13 | 12 | fveq2i 6770 | . . 3 ⊢ ((𝑥 ∈ V ↦ 𝒫 𝑥)‘(𝑅1‘𝐴)) = ((𝑥 ∈ V ↦ 𝒫 𝑥)‘(rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘𝐴)) |
14 | 11, 13 | eqtr3i 2768 | . 2 ⊢ 𝒫 (𝑅1‘𝐴) = ((𝑥 ∈ V ↦ 𝒫 𝑥)‘(rec((𝑥 ∈ V ↦ 𝒫 𝑥), ∅)‘𝐴)) |
15 | 4, 5, 14 | 3eqtr4g 2803 | 1 ⊢ (𝐴 ∈ dom 𝑅1 → (𝑅1‘suc 𝐴) = 𝒫 (𝑅1‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1539 ∈ wcel 2106 Vcvv 3430 ∅c0 4257 𝒫 cpw 4534 ↦ cmpt 5157 dom cdm 5585 suc csuc 6262 ‘cfv 6427 reccrdg 8228 𝑅1cr1 9508 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5222 ax-nul 5229 ax-pow 5287 ax-pr 5351 ax-un 7579 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-reu 3071 df-rab 3073 df-v 3432 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4258 df-if 4461 df-pw 4536 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4841 df-iun 4927 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5485 df-eprel 5491 df-po 5499 df-so 5500 df-fr 5540 df-we 5542 df-xp 5591 df-rel 5592 df-cnv 5593 df-co 5594 df-dm 5595 df-rn 5596 df-res 5597 df-ima 5598 df-pred 6196 df-ord 6263 df-on 6264 df-lim 6265 df-suc 6266 df-iota 6385 df-fun 6429 df-fn 6430 df-f 6431 df-f1 6432 df-fo 6433 df-f1o 6434 df-fv 6435 df-ov 7271 df-2nd 7822 df-frecs 8085 df-wrecs 8116 df-recs 8190 df-rdg 8229 df-r1 9510 |
This theorem is referenced by: r1suc 9516 r1fin 9519 r1tr 9522 r1ordg 9524 r1pwss 9530 r1val1 9532 rankwflemb 9539 r1elwf 9542 rankr1ai 9544 rankr1bg 9549 pwwf 9553 unwf 9556 uniwf 9565 rankonidlem 9574 rankr1id 9608 |
Copyright terms: Public domain | W3C validator |