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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 5265 | . . . 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 5232 |
| 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 5276 rabelpw 5278 difelpw 5296 pw2f1olem 9019 fineqvlem 9176 elfir 9328 r1sscl 9709 tskwe 9874 dfac8alem 9951 acni2 9968 fin1ai 10215 fin2i 10217 fin23lem7 10238 fin23lem11 10239 isfin2-2 10241 fin23lem39 10272 isf34lem1 10294 isf34lem2 10295 isf34lem4 10299 isf34lem5 10300 fin1a2lem12 10333 canthnumlem 10571 tsken 10677 tskss 10681 gruss 10719 ismre 17552 mreintcl 17557 mremre 17566 submre 17567 mrcval 17576 mrccl 17577 mrcun 17588 ismri 17597 acsfiel 17620 isacs1i 17623 catcoppccl 18084 acsdrsel 18509 acsdrscl 18512 acsficl 18513 pmtrval 19426 pmtrrn 19432 istopg 22860 uniopn 22862 iscld 22992 ntrval 23001 clsval 23002 discld 23054 mretopd 23057 neival 23067 isnei 23068 lpval 23104 restdis 23143 ordtbaslem 23153 ordtuni 23155 cndis 23256 tgcmp 23366 hauscmplem 23371 comppfsc 23497 elkgen 23501 xkoopn 23554 elqtop 23662 kqffn 23690 isfbas 23794 filss 23818 snfbas 23831 elfg 23836 ufilss 23870 fixufil 23887 cfinufil 23893 ufinffr 23894 ufilen 23895 fin1aufil 23897 flimclslem 23949 hauspwpwf1 23952 supnfcls 23985 flimfnfcls 23993 ptcmplem1 24017 tsmsfbas 24093 blfvalps 24348 blfps 24371 blf 24372 bcthlem5 25295 minveclem3b 25395 sigaclcuni 34262 sigaclcu2 34264 pwsiga 34274 erdsze2lem2 35386 cvmsval 35448 cvmsss2 35456 neibastop2lem 36542 tailf 36557 pibt2 37733 fin2so 37928 sdclem1 38064 elrfirn 43127 elrfirn2 43128 istopclsd 43132 nacsfix 43144 dnnumch1 43472 inpw 49294 |
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