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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 2144 Vcvv 3450 ⊆ wss 3895 𝒫 cpw 4556 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 |
| This proof depends on definitions: df-bi 210 df-an 402 df-3an 1105 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-rab 3413 df-v 3452 df-ss 3896 df-in 4091 df-pw 4558 |
| This theorem is used by: elpw2 5295 rabelpw 5297 difelpw 5314 pw2f1olem 9100 fineqvlem 9257 elfir 9407 r1sscl 9792 tskwe 10031 dfac8alem 10108 acni2 10125 fin1ai 10371 fin2i 10373 fin23lem7 10394 fin23lem11 10395 isfin2-2 10397 fin23lem39 10428 isf34lem1 10450 isf34lem2 10451 isf34lem4 10455 isf34lem5 10456 fin1a2lem12 10489 canthnumlem 10733 tsken 10839 tskss 10843 gruss 10881 ismre 17760 mreintcl 17765 mremre 17774 submre 17775 mrcval 17784 mrccl 17785 mrcun 17796 ismri 17805 acsfiel 17828 isacs1i 17831 catcoppccl 18292 acsdrsel 18717 acsdrscl 18720 acsficl 18721 pmtrval 19665 pmtrrn 19671 istopg 23213 uniopn 23215 iscld 23345 ntrval 23354 clsval 23355 discld 23407 mretopd 23410 neival 23420 isnei 23421 lpval 23457 restdis 23496 ordtbaslem 23506 ordtuni 23508 cndis 23609 tgcmp 23719 hauscmplem 23724 comppfsc 23851 elkgen 23855 xkoopn 23908 elqtop 24016 kqffn 24044 isfbas 24148 filss 24172 snfbas 24185 elfg 24190 ufilss 24224 fixufil 24241 cfinufil 24247 ufinffr 24248 ufilen 24249 fin1aufil 24251 flimclslem 24303 hauspwpwf1 24306 supnfcls 24339 flimfnfcls 24347 ptcmplem1 24371 tsmsfbas 24447 blfvalps 24702 blfps 24725 blf 24726 bcthlem5 25649 minveclem3b 25749 sigaclcuni 34750 sigaclcu2 34752 pwsiga 34762 erdsze2lem2 35969 cvmsval 36031 cvmsss2 36039 neibastop2lem 37148 tailf 37163 pibt2 38341 fin2so 38531 sdclem1 38678 elrfirn 43706 elrfirn2 43707 istopclsd 43711 nacsfix 43723 dnnumch1 44051 inpw 49935 |
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