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| Mirrors > Home > MPE Home > Th. List > inex1 | Structured version Visualization version GIF version | ||
| Description: Separation Scheme (Aussonderung) using class notation. Compare Exercise 4 of [TakeutiZaring] p. 22. (Contributed by NM, 21-Jun-1993.) |
| Ref | Expression |
|---|---|
| inex1.1 | ⊢ 𝐴 ∈ V |
| Ref | Expression |
|---|---|
| inex1 | ⊢ (𝐴 ∩ 𝐵) ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | inex1.1 | . . . 4 ⊢ 𝐴 ∈ V | |
| 2 | 1 | zfauscl 5233 | . . 3 ⊢ ∃𝑥∀𝑦(𝑦 ∈ 𝑥 ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵)) |
| 3 | dfcleq 2729 | . . . . 5 ⊢ (𝑥 = (𝐴 ∩ 𝐵) ↔ ∀𝑦(𝑦 ∈ 𝑥 ↔ 𝑦 ∈ (𝐴 ∩ 𝐵))) | |
| 4 | elin 3905 | . . . . . . 7 ⊢ (𝑦 ∈ (𝐴 ∩ 𝐵) ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵)) | |
| 5 | 4 | bibi2i 337 | . . . . . 6 ⊢ ((𝑦 ∈ 𝑥 ↔ 𝑦 ∈ (𝐴 ∩ 𝐵)) ↔ (𝑦 ∈ 𝑥 ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵))) |
| 6 | 5 | albii 1821 | . . . . 5 ⊢ (∀𝑦(𝑦 ∈ 𝑥 ↔ 𝑦 ∈ (𝐴 ∩ 𝐵)) ↔ ∀𝑦(𝑦 ∈ 𝑥 ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵))) |
| 7 | 3, 6 | bitri 275 | . . . 4 ⊢ (𝑥 = (𝐴 ∩ 𝐵) ↔ ∀𝑦(𝑦 ∈ 𝑥 ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵))) |
| 8 | 7 | exbii 1850 | . . 3 ⊢ (∃𝑥 𝑥 = (𝐴 ∩ 𝐵) ↔ ∃𝑥∀𝑦(𝑦 ∈ 𝑥 ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵))) |
| 9 | 2, 8 | mpbir 231 | . 2 ⊢ ∃𝑥 𝑥 = (𝐴 ∩ 𝐵) |
| 10 | 9 | issetri 3448 | 1 ⊢ (𝐴 ∩ 𝐵) ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 ∀wal 1540 = wceq 1542 ∃wex 1781 ∈ wcel 2114 Vcvv 3429 ∩ cin 3888 |
| 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 2708 ax-sep 5231 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2715 df-cleq 2728 df-clel 2811 df-v 3431 df-in 3896 |
| This theorem is referenced by: inex2 5259 inex1g 5260 inuni 5291 onfr 6362 ssimaex 6925 exfo 7057 ofmres 7937 fipwuni 9339 fisn 9340 elfiun 9343 dffi3 9344 marypha1lem 9346 epfrs 9652 tcmin 9660 bnd2 9817 kmlem13 10085 brdom3 10450 brdom5 10451 brdom4 10452 fpwwe 10569 canthwelem 10573 pwfseqlem4 10585 ingru 10738 ltweuz 13923 elrest 17390 invfval 17726 isoval 17732 isofn 17742 zeroofn 17956 zerooval 17962 catcval 18067 isacs5lem 18511 isunit 20353 isrhm 20458 rhmfn 20476 rhmval 20477 rhmsubclem1 20662 2idlval 21249 pjfval 21686 psdmul 22132 fctop 22969 cctop 22971 ppttop 22972 epttop 22974 mretopd 23057 toponmre 23058 tgrest 23124 resttopon 23126 restco 23129 ordtbas2 23156 cnrest2 23251 cnpresti 23253 cnprest 23254 cnprest2 23255 cmpsublem 23364 cmpsub 23365 connsuba 23385 1stcrest 23418 subislly 23446 cldllycmp 23460 lly1stc 23461 txrest 23596 basqtop 23676 fbssfi 23802 trfbas2 23808 snfil 23829 fgcl 23843 trfil2 23852 cfinfil 23858 csdfil 23859 supfil 23860 zfbas 23861 fin1aufil 23897 fmfnfmlem3 23921 flimrest 23948 hauspwpwf1 23952 fclsrest 23989 tmdgsum2 24061 tsmsval2 24095 tsmssubm 24108 ustuqtop2 24207 restmetu 24535 isnmhm 24711 icopnfhmeo 24910 iccpnfhmeo 24912 xrhmeo 24913 pi1buni 25007 minveclem3b 25395 uniioombllem2 25550 uniioombllem6 25555 vitali 25580 ellimc2 25844 limcflf 25848 taylfvallem 26323 taylf 26326 tayl0 26327 taylpfval 26330 xrlimcnp 26932 lrrecse 27934 ewlkle 29674 upgrewlkle2 29675 wlk1walk 29707 maprnin 32804 ordtprsval 34062 ordtprsuni 34063 ordtrestNEW 34065 ordtrest2NEWlem 34066 ordtrest2NEW 34067 ordtconnlem1 34068 xrge0iifhmeo 34080 eulerpartgbij 34516 eulerpartlemmf 34519 eulerpart 34526 ballotlemfrc 34671 cvmsss2 35456 cvmcov2 35457 mvrsval 35687 mpstval 35717 mclsind 35752 mthmpps 35764 dfon2lem4 35966 brapply 36118 neibastop1 36541 filnetlem3 36562 weiunfr 36649 bj-restn0 37402 bj-restuni 37409 ptrest 37940 heiborlem3 38134 heibor 38142 polvalN 40351 fnwe2lem2 43479 harval3 43965 superficl 43994 ssficl 43996 trficl 44096 onfrALTlem5 44969 onfrALTlem5VD 45311 fourierdlem48 46582 fourierdlem49 46583 sge0resplit 46834 hoiqssbllem3 47052 rngcvalALTV 48741 rhmsubcALTVlem1 48757 ringcvalALTV 48765 invfn 49505 |
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