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| Mirrors > Home > ILE Home > Th. List > elpw2 | GIF version | ||
| Description: Membership in a power class. Theorem 86 of [Suppes] p. 47. (Contributed by NM, 11-Oct-2007.) |
| Ref | Expression |
|---|---|
| elpw2.1 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| elpw2 | ⊢ (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elpw2.1 | . 2 ⊢ 𝐵 ∈ V | |
| 2 | elpw2g 4292 | . 2 ⊢ (𝐵 ∈ V → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ↔ wb 105 ∈ wcel 2209 Vcvv 2821 ⊆ 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 ax-sep 4249 |
| 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: elpwi2 4294 axpweq 4308 genpelxp 7878 ltexprlempr 7975 recexprlempr 7999 cauappcvgprlemcl 8020 cauappcvgprlemladd 8025 caucvgprlemcl 8043 caucvgprprlemcl 8071 uzf 9926 ixxf 10302 fzf 10417 cncfval 15675 reldvg 15782 dvfvalap 15784 plyval 15835 |
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