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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 4549 | . 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵) | |
| 2 | ssexg 5258 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ V) | |
| 3 | elpwg 4545 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) | |
| 4 | 3 | biimparc 479 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ∈ V) → 𝐴 ∈ 𝒫 𝐵) |
| 5 | 2, 4 | syldan 592 | . . 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 2114 Vcvv 3430 ⊆ wss 3890 𝒫 cpw 4542 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5231 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-3an 1089 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-rab 3391 df-v 3432 df-in 3897 df-ss 3907 df-pw 4544 |
| This theorem is referenced by: elpw2 5269 rabelpw 5271 difelpw 5289 pw2f1olem 9010 fineqvlem 9167 elfir 9319 r1sscl 9698 tskwe 9863 dfac8alem 9940 acni2 9957 fin1ai 10204 fin2i 10206 fin23lem7 10227 fin23lem11 10228 isfin2-2 10230 fin23lem39 10261 isf34lem1 10283 isf34lem2 10284 isf34lem4 10288 isf34lem5 10289 fin1a2lem12 10322 canthnumlem 10560 tsken 10666 tskss 10670 gruss 10708 ismre 17510 mreintcl 17515 mremre 17524 submre 17525 mrcval 17534 mrccl 17535 mrcun 17546 ismri 17555 acsfiel 17578 isacs1i 17581 catcoppccl 18042 acsdrsel 18467 acsdrscl 18470 acsficl 18471 pmtrval 19384 pmtrrn 19390 istopg 22838 uniopn 22840 iscld 22970 ntrval 22979 clsval 22980 discld 23032 mretopd 23035 neival 23045 isnei 23046 lpval 23082 restdis 23121 ordtbaslem 23131 ordtuni 23133 cndis 23234 tgcmp 23344 hauscmplem 23349 comppfsc 23475 elkgen 23479 xkoopn 23532 elqtop 23640 kqffn 23668 isfbas 23772 filss 23796 snfbas 23809 elfg 23814 ufilss 23848 fixufil 23865 cfinufil 23871 ufinffr 23872 ufilen 23873 fin1aufil 23875 flimclslem 23927 hauspwpwf1 23930 supnfcls 23963 flimfnfcls 23971 ptcmplem1 23995 tsmsfbas 24071 blfvalps 24326 blfps 24349 blf 24350 bcthlem5 25273 minveclem3b 25373 sigaclcuni 34268 sigaclcu2 34270 pwsiga 34280 erdsze2lem2 35392 cvmsval 35454 cvmsss2 35462 neibastop2lem 36548 tailf 36563 pibt2 37729 fin2so 37919 sdclem1 38055 elrfirn 43126 elrfirn2 43127 istopclsd 43131 nacsfix 43143 dnnumch1 43475 inpw 49258 |
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