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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 4092 | . 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 1569 ∈ wcel 2144 ∩ cin 4088 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-v 3452 df-in 4090 |
| This theorem is used by: elin3 4102 opelres 5977 elpredgg 6320 fnres 6671 funfvima 7240 fnwelem 8150 ressuppssdif 8210 fz1isolem 14613 isabl 20007 isogrp 20347 srhmsubclem1 20938 srhmsubc 20941 isidom 20985 isfld 21002 isofld 21130 2idlelb 21555 qus1 21577 qusrhm 21579 lmres 23627 isnvc 25023 cvslvec 25455 cvsclm 25456 iscvs 25457 cvsi 25460 ishl 25692 ply1pid 26510 rplogsum 27863 ltsres 28028 iscusgr 30008 isphg 31428 ishlo 31498 hhsscms 31889 mayete3i 32339 fwfffunres 35768 bj-elid6 38228 bj-isrvec 38352 caures 38831 iscrngo 39067 fldcrngo 39075 isdmn 39125 isolat 40406 srhmsubcALTV 49558 isidom2 49577 |
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