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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 4550 | . 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵) | |
2 | ssexg 5229 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ V) | |
3 | elpwg 4544 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) | |
4 | 3 | biimparc 482 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ∈ V) → 𝐴 ∈ 𝒫 𝐵) |
5 | 2, 4 | syldan 593 | . . 3 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ 𝒫 𝐵) |
6 | 5 | expcom 416 | . 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 2114 Vcvv 3496 ⊆ wss 3938 𝒫 cpw 4541 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-rab 3149 df-v 3498 df-in 3945 df-ss 3954 df-pw 4543 |
This theorem is referenced by: elpw2 5250 elpwi2 5251 pwnss 5252 difelpw 5254 rabelpw 5255 pw2f1olem 8623 fineqvlem 8734 elfir 8881 r1sscl 9216 tskwe 9381 dfac8alem 9457 acni2 9474 fin1ai 9717 fin2i 9719 fin23lem7 9740 fin23lem11 9741 isfin2-2 9743 fin23lem39 9774 isf34lem1 9796 isf34lem2 9797 isf34lem4 9801 isf34lem5 9802 fin1a2lem12 9835 canthnumlem 10072 tsken 10178 tskss 10182 gruss 10220 ismre 16863 mreintcl 16868 mremre 16877 submre 16878 mrcval 16883 mrccl 16884 mrcun 16895 ismri 16904 acsfiel 16927 isacs1i 16930 catcoppccl 17370 acsdrsel 17779 acsdrscl 17782 acsficl 17783 pmtrval 18581 pmtrrn 18587 istopg 21505 uniopn 21507 iscld 21637 ntrval 21646 clsval 21647 discld 21699 mretopd 21702 neival 21712 isnei 21713 lpval 21749 restdis 21788 ordtbaslem 21798 ordtuni 21800 cndis 21901 tgcmp 22011 hauscmplem 22016 comppfsc 22142 elkgen 22146 xkoopn 22199 elqtop 22307 kqffn 22335 isfbas 22439 filss 22463 snfbas 22476 elfg 22481 ufilss 22515 fixufil 22532 cfinufil 22538 ufinffr 22539 ufilen 22540 fin1aufil 22542 flimclslem 22594 hauspwpwf1 22597 supnfcls 22630 flimfnfcls 22638 ptcmplem1 22662 tsmsfbas 22738 blfvalps 22995 blfps 23018 blf 23019 bcthlem5 23933 minveclem3b 24033 sigaclcuni 31379 sigaclcu2 31381 pwsiga 31391 erdsze2lem2 32453 cvmsval 32515 cvmsss2 32523 neibastop2lem 33710 tailf 33725 pibt2 34700 fin2so 34881 sdclem1 35020 elrfirn 39299 elrfirn2 39300 istopclsd 39304 nacsfix 39316 dnnumch1 39651 |
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