| 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 5314. (Contributed by NM, 23-Dec-1993.) |
| Ref | Expression |
|---|---|
| p0ex | ⊢ {∅} ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pw0 4743 | . 2 ⊢ 𝒫 ∅ = {∅} | |
| 2 | 0ex 5229 | . . 3 ⊢ ∅ ∈ V | |
| 3 | 2 | pwex 5309 | . 2 ⊢ 𝒫 ∅ ∈ V |
| 4 | 1, 3 | eqeltrri 2836 | 1 ⊢ {∅} ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2119 Vcvv 3431 ∅c0 4261 𝒫 cpw 4529 {csn 4555 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-sep 5218 ax-nul 5228 ax-pow 5294 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-v 3433 df-dif 3886 df-ss 3900 df-nul 4262 df-pw 4531 df-sn 4556 |
| This theorem is referenced by: pp0ex 5315 dtruALT 5317 zfpair 5350 tposexg 8180 fsetexb 8801 endisj 8992 pw2eng 9011 dfac4 10035 dfac2b 10044 axcc2lem 10349 axdc2lem 10361 axcclem 10370 axpowndlem3 10513 isstruct2 17110 cat1 18055 plusffval 18605 grpinvfval 18945 grpsubfval 18950 mulgfval 19036 0symgefmndeq 19360 staffval 20813 scaffval 20870 ipffval 21623 refun0 23498 filconn 23866 alexsubALTlem2 24031 nmfval 24571 tcphex 25202 tchnmfval 25213 legval 28670 vieta 33764 locfinref 34025 oms0 34481 bnj105 34907 ssoninhaus 36676 onint1 36677 bj-tagex 37340 bj-1uplex 37361 rrnval 38194 dvnprodlem3 46391 ioorrnopn 46748 ioorrnopnxr 46750 ismeannd 46910 nelsubc3 49561 setc1ohomfval 49983 |
| Copyright terms: Public domain | W3C validator |