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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 2852 | . 2 ⊢ (𝐴 ∈ 𝑋 ↔ 𝐴 ∈ (𝐵 ∩ 𝐶)) |
| 3 | elin 3915 | . 2 ⊢ (𝐴 ∈ (𝐵 ∩ 𝐶) ↔ (𝐴 ∈ 𝐵 ∧ 𝐴 ∈ 𝐶)) | |
| 4 | 2, 3 | bitri 278 | 1 ⊢ (𝐴 ∈ 𝑋 ↔ (𝐴 ∈ 𝐵 ∧ 𝐴 ∈ 𝐶)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∩ cin 3898 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-v 3452 df-in 3906 |
| This theorem is used by: elin3 4152 opelres 5978 elpredgg 6312 fnres 6660 funfvima 7230 fnwelem 8130 ressuppssdif 8184 fz1isolem 14527 isabl 19912 isogrp 20252 srhmsubclem1 20840 srhmsubc 20843 isidom 20887 isfld 20904 isofld 21031 2idlelb 21456 qus1 21477 qusrhm 21479 lmres 23526 isnvc 24922 cvslvec 25354 cvsclm 25355 iscvs 25356 cvsi 25359 ishl 25591 ply1pid 26409 rplogsum 27764 ltsres 27899 iscusgr 29879 isphg 31299 ishlo 31369 hhsscms 31760 mayete3i 32210 bj-elid6 37923 bj-isrvec 38047 caures 38511 iscrngo 38747 fldcrngo 38755 isdmn 38805 isolat 40086 srhmsubcALTV 49241 isidom2 49260 |
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