| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > p0ex | Structured version Visualization version GIF version | ||
| Description: The power set of the empty set (the ordinal 1) is a set. See also p0exALT 5328. (Contributed by NM, 23-Dec-1993.) |
| Ref | Expression |
|---|---|
| p0ex | ⊢ {∅} ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pw0 4766 | . 2 ⊢ 𝒫 ∅ = {∅} | |
| 2 | 0ex 5250 | . . 3 ⊢ ∅ ∈ V | |
| 3 | 2 | pwex 5323 | . 2 ⊢ 𝒫 ∅ ∈ V |
| 4 | 1, 3 | eqeltrri 2831 | 1 ⊢ {∅} ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2113 Vcvv 3438 ∅c0 4283 𝒫 cpw 4552 {csn 4578 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-v 3440 df-dif 3902 df-ss 3916 df-nul 4284 df-pw 4554 df-sn 4579 |
| This theorem is referenced by: pp0ex 5329 dtruALT 5331 zfpair 5364 tposexg 8180 fsetexb 8799 endisj 8990 pw2eng 9009 dfac4 10030 dfac2b 10039 axcc2lem 10344 axdc2lem 10356 axcclem 10365 axpowndlem3 10508 isstruct2 17074 cat1 18019 plusffval 18569 grpinvfval 18906 grpsubfval 18911 mulgfval 18997 0symgefmndeq 19321 staffval 20772 scaffval 20829 lpival 21277 ipffval 21601 refun0 23457 filconn 23825 alexsubALTlem2 23990 nmfval 24530 tcphex 25171 tchnmfval 25182 legval 28605 vieta 33685 locfinref 33947 oms0 34403 bnj105 34829 ssoninhaus 36591 onint1 36592 bj-tagex 37131 bj-1uplex 37152 rrnval 37967 lsatset 39189 mnuprdlem2 44456 mnuprdlem3 44457 dvnprodlem3 46134 ioorrnopn 46491 ioorrnopnxr 46493 ismeannd 46653 nelsubc3 49258 setc1ohomfval 49680 |
| Copyright terms: Public domain | W3C validator |