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| Mirrors > Home > ILE Home > Th. List > velpw | GIF version | ||
| Description: Setvar variable membership in a power class (common case). See elpw 3675. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| velpw | ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 2816 | . 2 ⊢ 𝑥 ∈ V | |
| 2 | 1 | elpw 3675 | 1 ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 105 ∈ wcel 2203 ⊆ wss 3211 𝒫 cpw 3669 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-v 2815 df-in 3217 df-ss 3224 df-pw 3671 |
| This theorem is referenced by: sspw 3682 ordpwsucss 4689 fabexg 5554 abexssex 6318 qsss 6828 mapval2 6912 pmsspw 6917 uniixp 6956 exmidpw 7168 exmidpweq 7169 pw1fin 7170 pw1dc0el 7171 fival 7257 npsspw 7786 ballotfilem2 13140 restsspw 13460 subsubrng2 14358 subsubrg2 14389 lssintclm 14530 istopon 14876 isbasis2g 14908 tgval2 14914 unitg 14925 distop 14948 cldss2 14969 ntreq0 14995 discld 14999 neisspw 15011 restdis 15047 cnntr 15088 exmidnotnotr 16777 |
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