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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 5205 | . . 3 ⊢ ∃𝑥∀𝑦(𝑦 ∈ 𝑥 ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵)) |
3 | dfcleq 2815 | . . . . 5 ⊢ (𝑥 = (𝐴 ∩ 𝐵) ↔ ∀𝑦(𝑦 ∈ 𝑥 ↔ 𝑦 ∈ (𝐴 ∩ 𝐵))) | |
4 | elin 4169 | . . . . . . 7 ⊢ (𝑦 ∈ (𝐴 ∩ 𝐵) ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵)) | |
5 | 4 | bibi2i 340 | . . . . . 6 ⊢ ((𝑦 ∈ 𝑥 ↔ 𝑦 ∈ (𝐴 ∩ 𝐵)) ↔ (𝑦 ∈ 𝑥 ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵))) |
6 | 5 | albii 1820 | . . . . 5 ⊢ (∀𝑦(𝑦 ∈ 𝑥 ↔ 𝑦 ∈ (𝐴 ∩ 𝐵)) ↔ ∀𝑦(𝑦 ∈ 𝑥 ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵))) |
7 | 3, 6 | bitri 277 | . . . 4 ⊢ (𝑥 = (𝐴 ∩ 𝐵) ↔ ∀𝑦(𝑦 ∈ 𝑥 ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵))) |
8 | 7 | exbii 1848 | . . 3 ⊢ (∃𝑥 𝑥 = (𝐴 ∩ 𝐵) ↔ ∃𝑥∀𝑦(𝑦 ∈ 𝑥 ↔ (𝑦 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵))) |
9 | 2, 8 | mpbir 233 | . 2 ⊢ ∃𝑥 𝑥 = (𝐴 ∩ 𝐵) |
10 | 9 | issetri 3510 | 1 ⊢ (𝐴 ∩ 𝐵) ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 208 ∧ wa 398 ∀wal 1535 = wceq 1537 ∃wex 1780 ∈ wcel 2114 Vcvv 3494 ∩ cin 3935 |
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 2793 ax-sep 5203 |
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 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-v 3496 df-in 3943 |
This theorem is referenced by: inex2 5222 inex1g 5223 inuni 5246 predasetex 6163 onfr 6230 ssimaex 6748 exfo 6871 ofmres 7685 fipwuni 8890 fisn 8891 elfiun 8894 dffi3 8895 marypha1lem 8897 epfrs 9173 tcmin 9183 bnd2 9322 kmlem13 9588 brdom3 9950 brdom5 9951 brdom4 9952 fpwwe 10068 canthwelem 10072 pwfseqlem4 10084 ingru 10237 ltweuz 13330 elrest 16701 invfval 17029 isoval 17035 isofn 17045 zerooval 17259 catcval 17356 isacs5lem 17779 isunit 19407 isrhm 19473 2idlval 20006 pjfval 20850 fctop 21612 cctop 21614 ppttop 21615 epttop 21617 mretopd 21700 toponmre 21701 tgrest 21767 resttopon 21769 restco 21772 ordtbas2 21799 cnrest2 21894 cnpresti 21896 cnprest 21897 cnprest2 21898 cmpsublem 22007 cmpsub 22008 connsuba 22028 1stcrest 22061 subislly 22089 cldllycmp 22103 lly1stc 22104 txrest 22239 basqtop 22319 fbssfi 22445 trfbas2 22451 snfil 22472 fgcl 22486 trfil2 22495 cfinfil 22501 csdfil 22502 supfil 22503 zfbas 22504 fin1aufil 22540 fmfnfmlem3 22564 flimrest 22591 hauspwpwf1 22595 fclsrest 22632 tmdgsum2 22704 tsmsval2 22738 tsmssubm 22751 ustuqtop2 22851 restmetu 23180 isnmhm 23355 icopnfhmeo 23547 iccpnfhmeo 23549 xrhmeo 23550 pi1buni 23644 minveclem3b 24031 uniioombllem2 24184 uniioombllem6 24189 vitali 24214 ellimc2 24475 limcflf 24479 taylfvallem 24946 taylf 24949 tayl0 24950 taylpfval 24953 xrlimcnp 25546 ewlkle 27387 upgrewlkle2 27388 wlk1walk 27420 maprnin 30467 ordtprsval 31161 ordtprsuni 31162 ordtrestNEW 31164 ordtrest2NEWlem 31165 ordtrest2NEW 31166 ordtconnlem1 31167 xrge0iifhmeo 31179 eulerpartgbij 31630 eulerpartlemmf 31633 eulerpart 31640 ballotlemfrc 31784 cvmsss2 32521 cvmcov2 32522 mvrsval 32752 mpstval 32782 mclsind 32817 mthmpps 32829 dfon2lem4 33031 brapply 33399 neibastop1 33707 filnetlem3 33728 bj-restn0 34384 bj-restuni 34391 ptrest 34906 heiborlem3 35106 heibor 35114 polvalN 37056 fnwe2lem2 39700 harval3 39953 superficl 39975 ssficl 39977 trficl 40063 onfrALTlem5 40925 onfrALTlem5VD 41268 fourierdlem48 42488 fourierdlem49 42489 sge0resplit 42737 hoiqssbllem3 42955 rhmfn 44238 rhmval 44239 rngcvalALTV 44281 ringcvalALTV 44327 rhmsubclem1 44406 rhmsubcALTVlem1 44424 |
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