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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 4539 | . 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵) | |
| 2 | ssexg 5254 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ V) | |
| 3 | elpwg 4535 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) | |
| 4 | 3 | biimparc 481 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ∈ V) → 𝐴 ∈ 𝒫 𝐵) |
| 5 | 2, 4 | syldan 598 | . . 3 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ 𝒫 𝐵) |
| 6 | 5 | expcom 415 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐴 ⊆ 𝐵 → 𝐴 ∈ 𝒫 𝐵)) |
| 7 | 1, 6 | impbid2 228 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∈ wcel 2121 Vcvv 3433 ⊆ wss 3885 𝒫 cpw 4532 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-ext 2713 ax-sep 5221 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-3an 1095 df-tru 1551 df-ex 1788 df-sb 2075 df-clab 2720 df-cleq 2733 df-clel 2816 df-rab 3394 df-v 3435 df-in 3892 df-ss 3902 df-pw 4534 |
| This theorem is referenced by: elpw2 5265 rabelpw 5267 difelpw 5285 pw2f1olem 9013 fineqvlem 9170 elfir 9322 r1sscl 9704 tskwe 9869 dfac8alem 9946 acni2 9963 fin1ai 10210 fin2i 10212 fin23lem7 10233 fin23lem11 10234 isfin2-2 10236 fin23lem39 10267 isf34lem1 10289 isf34lem2 10290 isf34lem4 10294 isf34lem5 10295 fin1a2lem12 10328 canthnumlem 10566 tsken 10672 tskss 10676 gruss 10714 ismre 17547 mreintcl 17552 mremre 17561 submre 17562 mrcval 17571 mrccl 17572 mrcun 17583 ismri 17592 acsfiel 17615 isacs1i 17618 catcoppccl 18079 acsdrsel 18504 acsdrscl 18507 acsficl 18508 pmtrval 19421 pmtrrn 19427 istopg 22882 uniopn 22884 iscld 23014 ntrval 23023 clsval 23024 discld 23076 mretopd 23079 neival 23089 isnei 23090 lpval 23126 restdis 23165 ordtbaslem 23175 ordtuni 23177 cndis 23278 tgcmp 23388 hauscmplem 23393 comppfsc 23519 elkgen 23523 xkoopn 23576 elqtop 23684 kqffn 23712 isfbas 23816 filss 23840 snfbas 23853 elfg 23858 ufilss 23892 fixufil 23909 cfinufil 23915 ufinffr 23916 ufilen 23917 fin1aufil 23919 flimclslem 23971 hauspwpwf1 23974 supnfcls 24007 flimfnfcls 24015 ptcmplem1 24039 tsmsfbas 24115 blfvalps 24370 blfps 24393 blf 24394 bcthlem5 25317 minveclem3b 25417 sigaclcuni 34314 sigaclcu2 34316 pwsiga 34326 erdsze2lem2 35447 cvmsval 35509 cvmsss2 35517 neibastop2lem 36603 tailf 36618 pibt2 37794 fin2so 37989 sdclem1 38125 elrfirn 43159 elrfirn2 43160 istopclsd 43164 nacsfix 43176 dnnumch1 43504 inpw 49329 |
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