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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 2857 | . 2 ⊢ (𝐴 ∈ 𝑋 ↔ 𝐴 ∈ (𝐵 ∩ 𝐶)) |
| 3 | elin 3922 | . 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 2146 ∩ cin 3905 |
| 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 2148 ax-9 2156 ax-ext 2737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-v 3459 df-in 3913 |
| This theorem is used by: elin3 4159 opelres 5986 elpredgg 6319 fnres 6666 funfvima 7235 fnwelem 8133 ressuppssdif 8187 fz1isolem 14516 isabl 19898 isogrp 20238 srhmsubclem1 20826 srhmsubc 20829 isidom 20873 isfld 20890 isofld 21017 2idlelb 21442 qus1 21463 qusrhm 21465 lmres 23507 isnvc 24903 cvslvec 25335 cvsclm 25336 iscvs 25337 cvsi 25340 ishl 25572 ply1pid 26391 rplogsum 27742 ltsres 27877 iscusgr 29826 isphg 31240 ishlo 31310 hhsscms 31701 mayete3i 32151 bj-elid6 37871 bj-isrvec 37995 caures 38469 iscrngo 38705 fldcrngo 38713 isdmn 38763 isolat 40044 srhmsubcALTV 49147 isidom2 49166 |
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