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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 4564 | . 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵) | |
| 2 | ssexg 5281 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ V) | |
| 3 | elpwg 4560 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) | |
| 4 | 3 | biimparc 483 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ∈ V) → 𝐴 ∈ 𝒫 𝐵) |
| 5 | 2, 4 | syldan 600 | . . 3 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ 𝒫 𝐵) |
| 6 | 5 | expcom 417 | . 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 2144 Vcvv 3456 ⊆ wss 3906 𝒫 cpw 4557 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-ext 2736 ax-sep 5248 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-3an 1101 df-tru 1565 df-ex 1802 df-sb 2093 df-clab 2743 df-cleq 2756 df-clel 2839 df-rab 3417 df-v 3458 df-in 3913 df-ss 3923 df-pw 4559 |
| This theorem is referenced by: elpw2 5292 rabelpw 5294 difelpw 5312 pw2f1olem 9055 fineqvlem 9212 elfir 9363 r1sscl 9745 tskwe 9910 dfac8alem 9987 acni2 10004 fin1ai 10252 fin2i 10254 fin23lem7 10275 fin23lem11 10276 isfin2-2 10278 fin23lem39 10309 isf34lem1 10331 isf34lem2 10332 isf34lem4 10336 isf34lem5 10337 fin1a2lem12 10370 canthnumlem 10608 tsken 10714 tskss 10718 gruss 10756 ismre 17620 mreintcl 17625 mremre 17634 submre 17635 mrcval 17644 mrccl 17645 mrcun 17656 ismri 17665 acsfiel 17688 isacs1i 17691 catcoppccl 18152 acsdrsel 18577 acsdrscl 18580 acsficl 18581 pmtrval 19493 pmtrrn 19499 istopg 22957 uniopn 22959 iscld 23089 ntrval 23098 clsval 23099 discld 23151 mretopd 23154 neival 23164 isnei 23165 lpval 23201 restdis 23240 ordtbaslem 23250 ordtuni 23252 cndis 23353 tgcmp 23463 hauscmplem 23468 comppfsc 23594 elkgen 23598 xkoopn 23651 elqtop 23759 kqffn 23787 isfbas 23891 filss 23915 snfbas 23928 elfg 23933 ufilss 23967 fixufil 23984 cfinufil 23990 ufinffr 23991 ufilen 23992 fin1aufil 23994 flimclslem 24046 hauspwpwf1 24049 supnfcls 24082 flimfnfcls 24090 ptcmplem1 24114 tsmsfbas 24190 blfvalps 24445 blfps 24468 blf 24469 bcthlem5 25392 minveclem3b 25492 sigaclcuni 34417 sigaclcu2 34419 pwsiga 34429 erdsze2lem2 35559 cvmsval 35621 cvmsss2 35629 neibastop2lem 36725 tailf 36740 pibt2 37916 fin2so 38111 sdclem1 38247 elrfirn 43281 elrfirn2 43282 istopclsd 43286 nacsfix 43298 dnnumch1 43626 inpw 49451 |
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