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| Description: Power set axiom expressed in class notation. Axiom 4 of [TakeutiZaring] p. 17. |
| Ref | Expression |
|---|---|
| zfpowcl.1 |
|
| Ref | Expression |
|---|---|
| pwexOLD |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zfpowcl.1 |
. 2
| |
| 2 | pweq 3036 |
. . 3
| |
| 3 | 2 | eleq1d 1963 |
. 2
|
| 4 | zfpow 3482 |
. . . . . 6
| |
| 5 | dfss2 2610 |
. . . . . . . . 9
| |
| 6 | 5 | imbi1i 203 |
. . . . . . . 8
|
| 7 | 6 | albii 1346 |
. . . . . . 7
|
| 8 | 7 | exbii 1398 |
. . . . . 6
|
| 9 | 4, 8 | mpbir 207 |
. . . . 5
|
| 10 | 9 | bm1.3ii 3441 |
. . . 4
|
| 11 | df-pw 3035 |
. . . . . . 7
| |
| 12 | 11 | eqeq2i 1894 |
. . . . . 6
|
| 13 | abeq2 1999 |
. . . . . 6
| |
| 14 | 12, 13 | bitri 190 |
. . . . 5
|
| 15 | 14 | exbii 1398 |
. . . 4
|
| 16 | 10, 15 | mpbir 207 |
. . 3
|
| 17 | 16 | issetri 2298 |
. 2
|
| 18 | 1, 3, 17 | vtocl 2339 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-10 1308 ax-12 1310 ax-13 1311 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-sep 3438 ax-pow 3481 |
| This theorem depends on definitions: df-bi 164 df-an 242 df-ex 1327 df-sb 1536 df-clab 1872 df-cleq 1877 df-clel 1880 df-v 2294 df-in 2603 df-ss 2605 df-pw 3035 |