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Mirrors > Home > MPE Home > Th. List > elin2 | Structured version Visualization version GIF version |
Description: Membership in a class defined as an intersection. (Contributed by Stefan O'Rear, 29-Mar-2015.) |
Ref | Expression |
---|---|
elin2.x | ⊢ 𝑋 = (𝐵 ∩ 𝐶) |
Ref | Expression |
---|---|
elin2 | ⊢ (𝐴 ∈ 𝑋 ↔ (𝐴 ∈ 𝐵 ∧ 𝐴 ∈ 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elin2.x | . . 3 ⊢ 𝑋 = (𝐵 ∩ 𝐶) | |
2 | 1 | eleq2i 2904 | . 2 ⊢ (𝐴 ∈ 𝑋 ↔ 𝐴 ∈ (𝐵 ∩ 𝐶)) |
3 | elin 4168 | . 2 ⊢ (𝐴 ∈ (𝐵 ∩ 𝐶) ↔ (𝐴 ∈ 𝐵 ∧ 𝐴 ∈ 𝐶)) | |
4 | 2, 3 | bitri 277 | 1 ⊢ (𝐴 ∈ 𝑋 ↔ (𝐴 ∈ 𝐵 ∧ 𝐴 ∈ 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 208 ∧ wa 398 = wceq 1533 ∈ wcel 2110 ∩ cin 3934 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-v 3496 df-in 3942 |
This theorem is referenced by: elin3 4176 opelres 5853 elpredim 6154 elpred 6155 elpredg 6156 fnres 6468 funfvima 6986 fnwelem 7819 ressuppssdif 7845 fz1isolem 13813 isabl 18904 isfld 19505 2idlcpbl 20001 qus1 20002 qusrhm 20004 isidom 20071 lmres 21902 isnvc 23298 cvslvec 23723 cvsclm 23724 iscvs 23725 cvsi 23728 ishl 23959 ply1pid 24767 rplogsum 26097 iscusgr 27194 isphg 28588 ishlo 28658 hhsscms 29049 mayete3i 29499 isogrp 30698 isofld 30870 sltres 33164 bj-elid6 34456 bj-isrvec 34569 caures 35029 iscrngo 35268 fldcrng 35276 isdmn 35326 isolat 36342 srhmsubclem1 44338 srhmsubc 44341 srhmsubcALTV 44359 |
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