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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 4568 | . 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵) | |
| 2 | ssexg 5289 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ V) | |
| 3 | elpwg 4564 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) | |
| 4 | 3 | biimparc 484 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ∈ V) → 𝐴 ∈ 𝒫 𝐵) |
| 5 | 2, 4 | syldan 602 | . . 3 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ 𝒫 𝐵) |
| 6 | 5 | expcom 418 | . 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 2142 Vcvv 3454 ⊆ wss 3904 𝒫 cpw 4561 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-ext 2734 ax-sep 5256 |
| This proof depends on definitions: df-bi 210 df-an 401 df-3an 1104 df-tru 1572 df-ex 1809 df-sb 2096 df-clab 2741 df-cleq 2754 df-clel 2837 df-rab 3416 df-v 3456 df-in 3911 df-ss 3921 df-pw 4563 |
| This theorem is used by: elpw2 5304 rabelpw 5306 difelpw 5323 pw2f1olem 9067 fineqvlem 9224 elfir 9373 r1sscl 9755 tskwe 9943 dfac8alem 10020 acni2 10037 fin1ai 10283 fin2i 10285 fin23lem7 10306 fin23lem11 10307 isfin2-2 10309 fin23lem39 10340 isf34lem1 10362 isf34lem2 10363 isf34lem4 10367 isf34lem5 10368 fin1a2lem12 10401 canthnumlem 10639 tsken 10745 tskss 10749 gruss 10787 ismre 17648 mreintcl 17653 mremre 17662 submre 17663 mrcval 17672 mrccl 17673 mrcun 17684 ismri 17693 acsfiel 17716 isacs1i 17719 catcoppccl 18180 acsdrsel 18605 acsdrscl 18608 acsficl 18609 pmtrval 19527 pmtrrn 19533 istopg 23063 uniopn 23065 iscld 23195 ntrval 23204 clsval 23205 discld 23257 mretopd 23260 neival 23270 isnei 23271 lpval 23307 restdis 23346 ordtbaslem 23356 ordtuni 23358 cndis 23459 tgcmp 23569 hauscmplem 23574 comppfsc 23700 elkgen 23704 xkoopn 23757 elqtop 23865 kqffn 23893 isfbas 23997 filss 24021 snfbas 24034 elfg 24039 ufilss 24073 fixufil 24090 cfinufil 24096 ufinffr 24097 ufilen 24098 fin1aufil 24100 flimclslem 24152 hauspwpwf1 24155 supnfcls 24188 flimfnfcls 24196 ptcmplem1 24220 tsmsfbas 24296 blfvalps 24551 blfps 24574 blf 24575 bcthlem5 25498 minveclem3b 25598 sigaclcuni 34517 sigaclcu2 34519 pwsiga 34529 erdsze2lem2 35704 cvmsval 35766 cvmsss2 35774 neibastop2lem 36899 tailf 36914 pibt2 38091 fin2so 38286 sdclem1 38422 elrfirn 43454 elrfirn2 43455 istopclsd 43459 nacsfix 43471 dnnumch1 43799 inpw 49631 |
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