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Related theorems GIF version |
| Description: Equality theorem for the power class. |
| Ref | Expression |
|---|---|
| pweq | ⊢ (A = B → ℘A = ℘B) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sseq2 2135 | . . 3 ⊢ (A = B → (x ⊆ A ↔ x ⊆ B)) | |
| 2 | 1 | abbidv 1620 | . 2 ⊢ (A = B → {x∣x ⊆ A} = {x∣x ⊆ B}) |
| 3 | df-pw 2459 | . 2 ⊢ ℘A = {x∣x ⊆ A} | |
| 4 | df-pw 2459 | . 2 ⊢ ℘B = {x∣x ⊆ B} | |
| 5 | 2, 3, 4 | 3eqtr4g 1574 | 1 ⊢ (A = B → ℘A = ℘B) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 = wceq 992 {cab 1505 ⊆ wss 2099 ℘cpw 2458 |
| This theorem is referenced by: axpweq 2817 pwex 2823 pwexg 2824 pwssun 2905 canth2g 4630 pwen 4650 pwfi 4714 r1suc 4798 r1val3 4825 ranklim 4831 r1pw 4832 rankxplim 4858 mnfnre 5651 basis1 7826 eltg 7830 bastg 7834 bcth 8243 spwval2 8915 grothpw 9054 shsspwh 9394 iscomp 11114 bwt2 11123 topsinind 11136 compcov 11486 compsublem 11487 compsub 11488 uncomp 11490 hscptsscld 11491 compfipin0lem 11492 compfipin0 11493 cncomp 11494 alexsublem1 11496 alexsublem2 11497 alexsublem4 11499 alexsub 11500 is1stc 11528 2ndc1stc 11538 locfindsc 11576 topmtcl 11586 topmeet 11587 topjoin 11588 fnejoin1 11591 fgf 11632 elfg 11633 neifg 11644 isufil 11649 isufil2 11650 acdcg 11842 acdc3g 11843 acdc5g 11844 heiborlem1 12011 heiborlem9 12019 heiborlem42 12052 ishgrag 12195 hgralem 12196 ssunipwALT 12211 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 998 ax-gen 999 ax-8 1000 ax-10 1002 ax-12 1004 ax-17 1007 ax-4 1009 ax-5o 1011 ax-6o 1014 ax-9o 1159 ax-10o 1177 ax-16 1247 ax-11o 1255 ax-ext 1500 |
| This theorem depends on definitions: df-bi 145 df-an 223 df-ex 1017 df-sb 1209 df-clab 1506 df-cleq 1511 df-clel 1514 df-in 2103 df-ss 2105 df-pw 2459 |