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| Mirrors > Home > MPE Home > Th. List > elpw2g | Structured version Visualization version GIF version | ||
| Description: Membership in a power class. Theorem 86 of [Suppes] p. 47. (Contributed by NM, 7-Aug-2000.) |
| Ref | Expression |
|---|---|
| elpw2g | ⊢ (𝐵 ∈ 𝑉 → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elpwi 4567 | . 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵) | |
| 2 | ssexg 5285 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ V) | |
| 3 | elpwg 4563 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) | |
| 4 | 3 | biimparc 485 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ∈ V) → 𝐴 ∈ 𝒫 𝐵) |
| 5 | 2, 4 | syldan 603 | . . 3 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ 𝒫 𝐵) |
| 6 | 5 | expcom 419 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐴 ⊆ 𝐵 → 𝐴 ∈ 𝒫 𝐵)) |
| 7 | 1, 6 | impbid2 229 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∈ wcel 2147 Vcvv 3454 ⊆ wss 3900 𝒫 cpw 4560 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5252 |
| This proof depends on definitions: df-bi 210 df-an 402 df-3an 1105 df-tru 1573 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-rab 3417 df-v 3456 df-ss 3901 df-in 4094 df-pw 4562 |
| This theorem is used by: elpw2 5300 rabelpw 5302 difelpw 5319 pw2f1olem 9125 fineqvlem 9282 elfir 9431 r1sscl 9816 tskwe 10055 dfac8alem 10132 acni2 10149 fin1ai 10395 fin2i 10397 fin23lem7 10418 fin23lem11 10419 isfin2-2 10421 fin23lem39 10452 isf34lem1 10474 isf34lem2 10475 isf34lem4 10479 isf34lem5 10480 fin1a2lem12 10513 canthnumlem 10757 tsken 10863 tskss 10867 gruss 10905 ismre 17786 mreintcl 17791 mremre 17800 submre 17801 mrcval 17810 mrccl 17811 mrcun 17822 ismri 17831 acsfiel 17854 isacs1i 17857 catcoppccl 18318 acsdrsel 18743 acsdrscl 18746 acsficl 18747 pmtrval 19692 pmtrrn 19698 istopg 23240 uniopn 23242 iscld 23372 ntrval 23381 clsval 23382 discld 23434 mretopd 23437 neival 23447 isnei 23448 lpval 23484 restdis 23523 ordtbaslem 23533 ordtuni 23535 cndis 23636 tgcmp 23746 hauscmplem 23751 comppfsc 23878 elkgen 23882 xkoopn 23935 elqtop 24043 kqffn 24071 isfbas 24175 filss 24199 snfbas 24212 elfg 24217 ufilss 24251 fixufil 24268 cfinufil 24274 ufinffr 24275 ufilen 24276 fin1aufil 24278 flimclslem 24330 hauspwpwf1 24333 supnfcls 24366 flimfnfcls 24374 ptcmplem1 24398 tsmsfbas 24474 blfvalps 24729 blfps 24752 blf 24753 bcthlem5 25676 minveclem3b 25776 sigaclcuni 34817 sigaclcu2 34819 pwsiga 34829 erdsze2lem2 36135 cvmsval 36197 cvmsss2 36205 neibastop2lem 37325 tailf 37340 pibt2 38531 fin2so 38721 sdclem1 38868 elrfirn 43897 elrfirn2 43898 istopclsd 43902 nacsfix 43914 dnnumch1 44242 inpw 50139 |
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