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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 19579 pmtrrn 19585 istopg 23121 uniopn 23123 iscld 23253 ntrval 23262 clsval 23263 discld 23315 mretopd 23318 neival 23328 isnei 23329 lpval 23365 restdis 23404 ordtbaslem 23414 ordtuni 23416 cndis 23517 tgcmp 23627 hauscmplem 23632 comppfsc 23759 elkgen 23763 xkoopn 23816 elqtop 23924 kqffn 23952 isfbas 24056 filss 24080 snfbas 24093 elfg 24098 ufilss 24132 fixufil 24149 cfinufil 24155 ufinffr 24156 ufilen 24157 fin1aufil 24159 flimclslem 24211 hauspwpwf1 24214 supnfcls 24247 flimfnfcls 24255 ptcmplem1 24279 tsmsfbas 24355 blfvalps 24610 blfps 24633 blf 24634 bcthlem5 25557 minveclem3b 25657 sigaclcuni 34615 sigaclcu2 34617 pwsiga 34627 erdsze2lem2 35770 cvmsval 35832 cvmsss2 35840 neibastop2lem 36966 tailf 36981 pibt2 38158 fin2so 38348 sdclem1 38480 elrfirn 43527 elrfirn2 43528 istopclsd 43532 nacsfix 43544 dnnumch1 43872 inpw 49740 |
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