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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 4714 fabexg 5579 abexssex 6354 qsss 6868 fsetsspwxp 6948 mapval2 6959 pmsspw 6964 uniixp 7003 exmidpw 7215 exmidpweq 7216 pw1fin 7217 pw1dc0el 7218 fival 7304 npsspw 7838 ballotfilem2 13228 restsspw 13603 subsubrng2 14523 subsubrg2 14554 lssintclm 14721 istopon 15114 isbasis2g 15146 tgval2 15152 unitg 15163 distop 15186 cldss2 15207 ntreq0 15233 discld 15237 neisspw 15249 restdis 15285 cnntr 15326 exmidnotnotr 17036 |
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