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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 2856 | . 2 ⊢ (𝐴 ∈ 𝑋 ↔ 𝐴 ∈ (𝐵 ∩ 𝐶)) |
| 3 | elin 4096 | . 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 2147 ∩ cin 4092 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-v 3456 df-in 4094 |
| This theorem is used by: elin3 4106 opelres 5992 elpredgg 6343 fnres 6696 funfvima 7267 fnwelem 8180 ressuppssdif 8240 fz1isolem 14647 isabl 20049 isogrp 20389 srhmsubclem1 20980 srhmsubc 20983 isidom 21027 isfld 21044 isofld 21172 2idlelb 21597 qus1 21619 qusrhm 21621 lmres 23673 isnvc 25069 cvslvec 25501 cvsclm 25502 iscvs 25503 cvsi 25506 ishl 25738 ply1pid 26556 rplogsum 27911 ltsres 28076 iscusgr 30056 isphg 31476 ishlo 31546 hhsscms 31937 mayete3i 32387 fwfffunres 35829 bj-elid6 38359 bj-isrvec 38483 caures 38960 iscrngo 39196 fldcrngo 39204 isdmn 39254 isolat 40535 srhmsubcALTV 49695 isidom2 49772 |
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