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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 3656. (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| velpw | ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 2803 | . 2 ⊢ 𝑥 ∈ V | |
| 2 | 1 | elpw 3656 | 1 ⊢ (𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 105 ∈ wcel 2200 ⊆ wss 3198 𝒫 cpw 3650 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-v 2802 df-in 3204 df-ss 3211 df-pw 3652 |
| This theorem is referenced by: ordpwsucss 4663 fabexg 5521 abexssex 6282 qsss 6758 mapval2 6842 pmsspw 6847 uniixp 6885 exmidpw 7093 exmidpweq 7094 pw1fin 7095 pw1dc0el 7096 fival 7160 npsspw 7681 restsspw 13322 subsubrng2 14219 subsubrg2 14250 lssintclm 14388 istopon 14727 isbasis2g 14759 tgval2 14765 unitg 14776 distop 14799 cldss2 14820 ntreq0 14846 discld 14850 neisspw 14862 restdis 14898 cnntr 14939 |
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