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| Mirrors > Home > ILE Home > Th. List > elint2 | GIF version | ||
| Description: Membership in class intersection. (Contributed by NM, 14-Oct-1999.) | 
| Ref | Expression | 
|---|---|
| elint2.1 | ⊢ 𝐴 ∈ V | 
| Ref | Expression | 
|---|---|
| elint2 | ⊢ (𝐴 ∈ ∩ 𝐵 ↔ ∀𝑥 ∈ 𝐵 𝐴 ∈ 𝑥) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | elint2.1 | . . 3 ⊢ 𝐴 ∈ V | |
| 2 | 1 | elint 3880 | . 2 ⊢ (𝐴 ∈ ∩ 𝐵 ↔ ∀𝑥(𝑥 ∈ 𝐵 → 𝐴 ∈ 𝑥)) | 
| 3 | df-ral 2480 | . 2 ⊢ (∀𝑥 ∈ 𝐵 𝐴 ∈ 𝑥 ↔ ∀𝑥(𝑥 ∈ 𝐵 → 𝐴 ∈ 𝑥)) | |
| 4 | 2, 3 | bitr4i 187 | 1 ⊢ (𝐴 ∈ ∩ 𝐵 ↔ ∀𝑥 ∈ 𝐵 𝐴 ∈ 𝑥) | 
| Colors of variables: wff set class | 
| Syntax hints: → wi 4 ↔ wb 105 ∀wal 1362 ∈ wcel 2167 ∀wral 2475 Vcvv 2763 ∩ cint 3874 | 
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-ext 2178 | 
| This theorem depends on definitions: df-bi 117 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-v 2765 df-int 3875 | 
| This theorem is referenced by: elintg 3882 ssint 3890 intssunim 3896 iinuniss 3999 trint 4146 suplocexprlemmu 7785 suplocexprlemdisj 7787 suplocexprlemloc 7788 suplocexprlemub 7790 | 
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