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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 3694. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| velpw | ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 2824 | . 2 ⊢ 𝑥 ∈ V | |
| 2 | 1 | elpw 3694 | 1 ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ↔ wb 105 ∈ wcel 2209 ⊆ wss 3220 𝒫 cpw 3688 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-in 3226 df-ss 3233 df-pw 3690 |
| This theorem is used by: sspw 3702 ordpwsucss 4716 fabexg 5582 abexssex 6358 qsss 6872 fsetsspwxp 6952 mapval2 6963 pmsspw 6968 uniixp 7007 exmidpw 7219 exmidpweq 7220 pw1fin 7221 pw1dc0el 7222 fival 7309 npsspw 7844 ballotfilem2 13286 restsspw 13662 subsubrng2 14632 subsubrg2 14663 lssintclm 14830 istopon 15239 isbasis2g 15271 tgval2 15277 unitg 15288 distop 15311 cldss2 15332 ntreq0 15358 discld 15362 neisspw 15374 restdis 15410 cnntr 15451 exmidnotnotr 17241 |
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