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Related theorems GIF version |
| Description: Equality theorem for intersection of two classes. |
| Ref | Expression |
|---|---|
| ineq1 | ⊢ (A = B → (A ∩ C) = (B ∩ C)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq2 1578 | . . . 4 ⊢ (A = B → (x ∈ A ↔ x ∈ B)) | |
| 2 | 1 | anbi1d 620 | . . 3 ⊢ (A = B → ((x ∈ A ⋀ x ∈ C) ↔ (x ∈ B ⋀ x ∈ C))) |
| 3 | elin 2259 | . . 3 ⊢ (x ∈ (A ∩ C) ↔ (x ∈ A ⋀ x ∈ C)) | |
| 4 | elin 2259 | . . 3 ⊢ (x ∈ (B ∩ C) ↔ (x ∈ B ⋀ x ∈ C)) | |
| 5 | 2, 3, 4 | 3bitr4g 558 | . 2 ⊢ (A = B → (x ∈ (A ∩ C) ↔ x ∈ (B ∩ C))) |
| 6 | 5 | eqrdv 1516 | 1 ⊢ (A = B → (A ∩ C) = (B ∩ C)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ⋀ wa 221 = wceq 992 ∈ wcel 994 ∩ cin 2098 |
| This theorem is referenced by: ineq2 2263 ineq12 2264 ineq1i 2265 ineq1d 2268 unineq 2307 inex1g 2792 frc 2950 onnev 3329 reseq1 3455 isofrlem 4015 fiint 4703 inf3lema 4754 aceq5lem5 4885 kmlem12 4922 kmlem14 4924 cdaung 5073 inopn 7812 isbasisg 7823 basis1 7826 basis2 7827 tgval 7828 subtop 7858 cctop 7862 elcls 7914 clsndisj 7916 elcls3 7921 islp2 7957 lpbl 8090 methausi 8092 omlsi 9522 pjoml 9545 shincl 9627 shmodi 9639 chm0 9690 chincl 9698 chdmm1 9724 ledi 9739 cmbr 9803 cmbr3 9827 mdbr 10502 dmdmd 10508 dmdi 10510 dmdbr3 10513 dmdbr4 10514 mdslmd1lem4 10536 cvmd 10544 cvexch 10582 dmdbr6ati 10632 mddmdin0i 10640 infi1 10735 intprd 10755 neiopne 10757 subspemp 11060 sbtpsines 11062 filint 11075 cnfilca 11088 dtt2 11110 bwt2 11123 elfiun 11421 fictblem 11422 fictb 11423 opnbnd 11461 hausnei2 11471 elsubsp 11477 subspid 11478 subsubtop 11479 subcld 11480 subcls 11481 compsublem 11487 compsub 11488 hscptsscld 11491 dfcon2 11501 connsub 11502 reconnlem1 11507 isfne 11541 locfincomp 11575 neibastop1 11579 nrmsep 11615 nrmsep2 11616 isfbas 11621 fbasssin 11625 fbunfip 11631 fgf 11632 isufil2 11650 filcon 11665 fclusnei 11719 fclusneii 11721 fcluscf 11724 flimfnfcls 11727 fclusfnei 11738 fclsfneii 11740 tailfb 11762 inficl 11849 subspopn 11900 subspcld 11901 subspabs 11903 metsstop 11909 icoopnst 11940 iocopnst 11941 cnres 11950 cnss 11953 txbas 11973 txsubsp 11983 sstotbnd 11992 totbndss 11993 bndss 11998 ishgrag 12195 hgralem 12196 ispgrag 12205 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 998 ax-gen 999 ax-8 1000 ax-10 1002 ax-12 1004 ax-17 1007 ax-4 1009 ax-5o 1011 ax-6o 1014 ax-9o 1159 ax-10o 1177 ax-16 1247 ax-11o 1255 ax-ext 1500 |
| This theorem depends on definitions: df-bi 145 df-an 223 df-ex 1017 df-sb 1209 df-clab 1506 df-cleq 1511 df-clel 1514 df-v 1858 df-in 2103 |