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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 4561 | . 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵) | |
| 2 | ssexg 5268 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ V) | |
| 3 | elpwg 4557 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) | |
| 4 | 3 | biimparc 479 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ∈ V) → 𝐴 ∈ 𝒫 𝐵) |
| 5 | 2, 4 | syldan 591 | . . 3 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ 𝒫 𝐵) |
| 6 | 5 | expcom 413 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐴 ⊆ 𝐵 → 𝐴 ∈ 𝒫 𝐵)) |
| 7 | 1, 6 | impbid2 226 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∈ wcel 2113 Vcvv 3440 ⊆ wss 3901 𝒫 cpw 4554 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-sep 5241 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-3an 1088 df-tru 1544 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-rab 3400 df-v 3442 df-in 3908 df-ss 3918 df-pw 4556 |
| This theorem is referenced by: elpw2 5279 rabelpw 5281 difelpw 5299 pw2f1olem 9009 fineqvlem 9166 elfir 9318 r1sscl 9697 tskwe 9862 dfac8alem 9939 acni2 9956 fin1ai 10203 fin2i 10205 fin23lem7 10226 fin23lem11 10227 isfin2-2 10229 fin23lem39 10260 isf34lem1 10282 isf34lem2 10283 isf34lem4 10287 isf34lem5 10288 fin1a2lem12 10321 canthnumlem 10559 tsken 10665 tskss 10669 gruss 10707 ismre 17509 mreintcl 17514 mremre 17523 submre 17524 mrcval 17533 mrccl 17534 mrcun 17545 ismri 17554 acsfiel 17577 isacs1i 17580 catcoppccl 18041 acsdrsel 18466 acsdrscl 18469 acsficl 18470 pmtrval 19380 pmtrrn 19386 istopg 22839 uniopn 22841 iscld 22971 ntrval 22980 clsval 22981 discld 23033 mretopd 23036 neival 23046 isnei 23047 lpval 23083 restdis 23122 ordtbaslem 23132 ordtuni 23134 cndis 23235 tgcmp 23345 hauscmplem 23350 comppfsc 23476 elkgen 23480 xkoopn 23533 elqtop 23641 kqffn 23669 isfbas 23773 filss 23797 snfbas 23810 elfg 23815 ufilss 23849 fixufil 23866 cfinufil 23872 ufinffr 23873 ufilen 23874 fin1aufil 23876 flimclslem 23928 hauspwpwf1 23931 supnfcls 23964 flimfnfcls 23972 ptcmplem1 23996 tsmsfbas 24072 blfvalps 24327 blfps 24350 blf 24351 bcthlem5 25284 minveclem3b 25384 sigaclcuni 34275 sigaclcu2 34277 pwsiga 34287 erdsze2lem2 35398 cvmsval 35460 cvmsss2 35468 neibastop2lem 36554 tailf 36569 pibt2 37622 fin2so 37808 sdclem1 37944 elrfirn 42937 elrfirn2 42938 istopclsd 42942 nacsfix 42954 dnnumch1 43286 inpw 49070 |
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