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Related theorems GIF version |
| Description: Value of the cumulative hierarchy of sets function at a successor ordinal. Part of Definition 9.9 of [TakeutiZaring] p. 76. |
| Ref | Expression |
|---|---|
| r1suc | ⊢ (A ∈ On → (R1 ‘suc A) = ℘(R1 ‘A)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fvex 2838 | . . 3 ⊢ (R1 ‘A) ∈ V | |
| 2 | 1 | pwex 1806 | . 2 ⊢ ℘(R1 ‘A) ∈ V |
| 3 | ax-17 925 | . . 3 ⊢ (z ∈ ∅ → ∀x z ∈ ∅) | |
| 4 | ax-17 925 | . . 3 ⊢ (z ∈ A → ∀x z ∈ A) | |
| 5 | ax-17 925 | . . 3 ⊢ (z ∈ ℘(R1 ‘A) → ∀x z ∈ ℘(R1 ‘A)) | |
| 6 | df-r1 3487 | . . 3 ⊢ R1 = rec({〈x, y〉∣y = ℘x}, ∅) | |
| 7 | pweq 1800 | . . 3 ⊢ (x = (R1 ‘A) → ℘x = ℘(R1 ‘A)) | |
| 8 | 3, 4, 5, 6, 7 | rdgsucopab 2984 | . 2 ⊢ ((A ∈ On ∧ ℘(R1 ‘A) ∈ V) → (R1 ‘suc A) = ℘(R1 ‘A)) |
| 9 | 2, 8 | mpan2 519 | 1 ⊢ (A ∈ On → (R1 ‘suc A) = ℘(R1 ‘A)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 = wceq 1091 ∈ wcel 1092 Vcvv 1348 ∅c0 1707 ℘cpw 1798 Oncon0 2199 suc csuc 2201 ‘cfv 2422 R1cr1 3485 |
| This theorem is referenced by: r1tr 3498 r1ord 3499 r1val1 3502 tz9.12lem3 3505 rankval2 3514 rankel 3524 rankval3 3525 rankpw 3528 r1rankid 3537 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-un 1076 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3or 582 df-3an 583 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 df-rex 1206 df-rab 1208 df-v 1349 df-sbc 1441 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-if 1777 df-pw 1799 df-sn 1811 df-pr 1812 df-tp 1814 df-op 1815 df-uni 1920 df-tr 2042 df-br 2063 df-opab 2098 df-eprel 2122 df-id 2125 df-po 2128 df-so 2138 df-fr 2169 df-we 2186 df-ord 2202 df-on 2203 df-lim 2204 df-suc 2205 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fn 2433 df-fv 2438 df-rdg 2970 df-r1 3487 |