| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > 0elpw | Structured version Visualization version GIF version | ||
| Description: Every power class contains the empty set. (Contributed by NM, 25-Oct-2007.) |
| Ref | Expression |
|---|---|
| 0elpw | ⊢ ∅ ∈ 𝒫 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0ss 4352 | . 2 ⊢ ∅ ⊆ 𝐴 | |
| 2 | 0ex 5252 | . . 3 ⊢ ∅ ∈ V | |
| 3 | 2 | elpw 4558 | . 2 ⊢ (∅ ∈ 𝒫 𝐴 ↔ ∅ ⊆ 𝐴) |
| 4 | 1, 3 | mpbir 231 | 1 ⊢ ∅ ∈ 𝒫 𝐴 |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2113 ⊆ wss 3901 ∅c0 4285 𝒫 cpw 4554 |
| 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 2708 ax-nul 5251 |
| 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 2715 df-cleq 2728 df-clel 2811 df-v 3442 df-dif 3904 df-ss 3918 df-nul 4286 df-pw 4556 |
| This theorem is referenced by: pwne0 5302 marypha1lem 9336 brwdom2 9478 canthwdom 9484 isfin1-3 10296 canthp1lem2 10564 ixxssxr 13273 incexc 15760 smupf 16405 hashbc0 16933 ramz2 16952 mreexexlem3d 17569 acsfn 17582 isdrs2 18229 fpwipodrs 18463 pwmndid 18861 pwmnd 18862 clsval2 22994 mretopd 23036 comppfsc 23476 alexsubALTlem2 23992 alexsubALTlem4 23994 0no 27805 bday0 27807 0lt1s 27808 bday0b 27809 rightge0 27817 madessno 27836 oldssno 27837 newssno 27838 lltr 27858 made0 27859 eupth2lems 30313 esplyfval0 33722 vieta 33736 esum0 34206 esumcst 34220 esumpcvgval 34235 prsiga 34288 pwldsys 34314 ldgenpisyslem1 34320 carsggect 34475 kur14 35410 0hf 36371 bj-tagss 37181 bj-0int 37302 bj-mooreset 37303 bj-ismoored0 37307 topdifinfindis 37547 0totbnd 37970 heiborlem6 38013 istopclsd 42938 ntrkbimka 44275 ntrk0kbimka 44276 clsk1indlem0 44278 ntrclscls00 44303 ntrneicls11 44327 ismnushort 44538 0pwfi 45300 dvnprodlem3 46188 pwsal 46555 salexct 46574 sge0rnn0 46608 sge00 46616 psmeasure 46711 caragen0 46746 0ome 46769 isomenndlem 46770 ovn0 46806 ovnsubadd2lem 46885 smfresal 47028 sprsymrelfvlem 47732 lincval0 48657 lco0 48669 linds0 48707 |
| Copyright terms: Public domain | W3C validator |