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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 4563 | . 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵) | |
| 2 | ssexg 5280 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ V) | |
| 3 | elpwg 4559 | . . . . 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 3450 ⊆ wss 3898 𝒫 cpw 4556 |
| 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 2732 ax-sep 5248 |
| 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 2739 df-cleq 2752 df-clel 2835 df-rab 3413 df-v 3452 df-in 3905 df-ss 3915 df-pw 4558 |
| This theorem is used by: elpw2 5295 rabelpw 5297 difelpw 5314 pw2f1olem 9078 fineqvlem 9235 elfir 9385 r1sscl 9767 tskwe 10002 dfac8alem 10079 acni2 10096 fin1ai 10342 fin2i 10344 fin23lem7 10365 fin23lem11 10366 isfin2-2 10368 fin23lem39 10399 isf34lem1 10421 isf34lem2 10422 isf34lem4 10426 isf34lem5 10427 fin1a2lem12 10460 canthnumlem 10704 tsken 10810 tskss 10814 gruss 10852 ismre 17721 mreintcl 17726 mremre 17735 submre 17736 mrcval 17745 mrccl 17746 mrcun 17757 ismri 17766 acsfiel 17789 isacs1i 17792 catcoppccl 18253 acsdrsel 18678 acsdrscl 18681 acsficl 18682 pmtrval 19626 pmtrrn 19632 istopg 23174 uniopn 23176 iscld 23306 ntrval 23315 clsval 23316 discld 23368 mretopd 23371 neival 23381 isnei 23382 lpval 23418 restdis 23457 ordtbaslem 23467 ordtuni 23469 cndis 23570 tgcmp 23680 hauscmplem 23685 comppfsc 23812 elkgen 23816 xkoopn 23869 elqtop 23977 kqffn 24005 isfbas 24109 filss 24133 snfbas 24146 elfg 24151 ufilss 24185 fixufil 24202 cfinufil 24208 ufinffr 24209 ufilen 24210 fin1aufil 24212 flimclslem 24264 hauspwpwf1 24267 supnfcls 24300 flimfnfcls 24308 ptcmplem1 24332 tsmsfbas 24408 blfvalps 24663 blfps 24686 blf 24687 bcthlem5 25610 minveclem3b 25710 sigaclcuni 34683 sigaclcu2 34685 pwsiga 34695 erdsze2lem2 35890 cvmsval 35952 cvmsss2 35960 neibastop2lem 37070 tailf 37085 pibt2 38260 fin2so 38450 sdclem1 38597 elrfirn 43644 elrfirn2 43645 istopclsd 43649 nacsfix 43661 dnnumch1 43989 inpw 49857 |
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