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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 5288 | . . . 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 2145 Vcvv 3453 ⊆ wss 3902 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2734 ax-sep 5255 |
| This proof depends on definitions: df-bi 210 df-an 402 df-3an 1105 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-rab 3415 df-v 3455 df-in 3909 df-ss 3919 df-pw 4562 |
| This theorem is used by: elpw2 5303 rabelpw 5305 difelpw 5322 pw2f1olem 9082 fineqvlem 9239 elfir 9388 r1sscl 9770 tskwe 9958 dfac8alem 10035 acni2 10052 fin1ai 10298 fin2i 10300 fin23lem7 10321 fin23lem11 10322 isfin2-2 10324 fin23lem39 10355 isf34lem1 10377 isf34lem2 10378 isf34lem4 10382 isf34lem5 10383 fin1a2lem12 10416 canthnumlem 10660 tsken 10766 tskss 10770 gruss 10808 ismre 17678 mreintcl 17683 mremre 17692 submre 17693 mrcval 17702 mrccl 17703 mrcun 17714 ismri 17723 acsfiel 17746 isacs1i 17749 catcoppccl 18210 acsdrsel 18635 acsdrscl 18638 acsficl 18639 pmtrval 19582 pmtrrn 19588 istopg 23124 uniopn 23126 iscld 23256 ntrval 23265 clsval 23266 discld 23318 mretopd 23321 neival 23331 isnei 23332 lpval 23368 restdis 23407 ordtbaslem 23417 ordtuni 23419 cndis 23520 tgcmp 23630 hauscmplem 23635 comppfsc 23762 elkgen 23766 xkoopn 23819 elqtop 23927 kqffn 23955 isfbas 24059 filss 24083 snfbas 24096 elfg 24101 ufilss 24135 fixufil 24152 cfinufil 24158 ufinffr 24159 ufilen 24160 fin1aufil 24162 flimclslem 24214 hauspwpwf1 24217 supnfcls 24250 flimfnfcls 24258 ptcmplem1 24282 tsmsfbas 24358 blfvalps 24613 blfps 24636 blf 24637 bcthlem5 25560 minveclem3b 25660 sigaclcuni 34630 sigaclcu2 34632 pwsiga 34642 erdsze2lem2 35785 cvmsval 35847 cvmsss2 35855 neibastop2lem 36981 tailf 36996 pibt2 38173 fin2so 38363 sdclem1 38495 elrfirn 43542 elrfirn2 43543 istopclsd 43547 nacsfix 43559 dnnumch1 43887 inpw 49755 |
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