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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 2853 | . 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 2733 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-v 3453 df-in 3906 |
| This theorem is used by: elin3 4152 opelres 5976 elpredgg 6317 fnres 6666 funfvima 7236 fnwelem 8143 ressuppssdif 8202 fz1isolem 14606 isabl 19998 isogrp 20338 srhmsubclem1 20929 srhmsubc 20932 isidom 20976 isfld 20993 isofld 21121 2idlelb 21546 qus1 21568 qusrhm 21570 lmres 23618 isnvc 25014 cvslvec 25446 cvsclm 25447 iscvs 25448 cvsi 25451 ishl 25683 ply1pid 26501 rplogsum 27854 ltsres 28019 iscusgr 29999 isphg 31419 ishlo 31489 hhsscms 31880 mayete3i 32330 bj-elid6 38091 bj-isrvec 38215 caures 38694 iscrngo 38930 fldcrngo 38938 isdmn 38988 isolat 40269 srhmsubcALTV 49421 isidom2 49440 |
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