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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 4572 | . 2 ⊢ (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵) | |
| 2 | ssexg 5294 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ V) | |
| 3 | elpwg 4568 | . . . . 5 ⊢ (𝐴 ∈ V → (𝐴 ∈ 𝒫 𝐵 ↔ 𝐴 ⊆ 𝐵)) | |
| 4 | 3 | biimparc 484 | . . . 4 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ∈ V) → 𝐴 ∈ 𝒫 𝐵) |
| 5 | 2, 4 | syldan 602 | . . 3 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝑉) → 𝐴 ∈ 𝒫 𝐵) |
| 6 | 5 | expcom 418 | . 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 |
| Syntax hints: → wi 4 ↔ wb 209 ∈ wcel 2149 Vcvv 3461 ⊆ wss 3911 𝒫 cpw 4565 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5259 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-3an 1103 df-tru 1570 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-rab 3423 df-v 3463 df-in 3918 df-ss 3928 df-pw 4567 |
| This theorem is referenced by: elpw2 5305 rabelpw 5307 difelpw 5325 pw2f1olem 9069 fineqvlem 9226 elfir 9375 r1sscl 9757 tskwe 9936 dfac8alem 10013 acni2 10030 fin1ai 10277 fin2i 10279 fin23lem7 10300 fin23lem11 10301 isfin2-2 10303 fin23lem39 10334 isf34lem1 10356 isf34lem2 10357 isf34lem4 10361 isf34lem5 10362 fin1a2lem12 10395 canthnumlem 10633 tsken 10739 tskss 10743 gruss 10781 ismre 17642 mreintcl 17647 mremre 17656 submre 17657 mrcval 17666 mrccl 17667 mrcun 17678 ismri 17687 acsfiel 17710 isacs1i 17713 catcoppccl 18174 acsdrsel 18599 acsdrscl 18602 acsficl 18603 pmtrval 19521 pmtrrn 19527 istopg 23021 uniopn 23023 iscld 23153 ntrval 23162 clsval 23163 discld 23215 mretopd 23218 neival 23228 isnei 23229 lpval 23265 restdis 23304 ordtbaslem 23314 ordtuni 23316 cndis 23417 tgcmp 23527 hauscmplem 23532 comppfsc 23658 elkgen 23662 xkoopn 23715 elqtop 23823 kqffn 23851 isfbas 23955 filss 23979 snfbas 23992 elfg 23997 ufilss 24031 fixufil 24048 cfinufil 24054 ufinffr 24055 ufilen 24056 fin1aufil 24058 flimclslem 24110 hauspwpwf1 24113 supnfcls 24146 flimfnfcls 24154 ptcmplem1 24178 tsmsfbas 24254 blfvalps 24509 blfps 24532 blf 24533 bcthlem5 25456 minveclem3b 25556 sigaclcuni 34453 sigaclcu2 34455 pwsiga 34465 erdsze2lem2 35629 cvmsval 35691 cvmsss2 35699 neibastop2lem 36794 tailf 36809 pibt2 37986 fin2so 38181 sdclem1 38317 elrfirn 43353 elrfirn2 43354 istopclsd 43358 nacsfix 43370 dnnumch1 43698 inpw 49523 |
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