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| Mirrors > Home > ILE Home > Th. List > elind | GIF version | ||
| Description: Deduce membership in an intersection of two classes. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) |
| Ref | Expression |
|---|---|
| elind.1 | ⊢ (𝜑 → 𝑋 ∈ 𝐴) |
| elind.2 | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| elind | ⊢ (𝜑 → 𝑋 ∈ (𝐴 ∩ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elind.1 | . 2 ⊢ (𝜑 → 𝑋 ∈ 𝐴) | |
| 2 | elind.2 | . 2 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 3 | elin 3387 | . 2 ⊢ (𝑋 ∈ (𝐴 ∩ 𝐵) ↔ (𝑋 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵)) | |
| 4 | 1, 2, 3 | sylanbrc 417 | 1 ⊢ (𝜑 → 𝑋 ∈ (𝐴 ∩ 𝐵)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2200 ∩ cin 3196 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-v 2801 df-in 3203 |
| This theorem is referenced by: fnfvimad 5879 elfir 7151 infpwfidom 7387 nninfdclemcl 13034 nninfdclemp1 13036 strslfv2d 13090 bassetsnn 13104 insubm 13533 2idl0 14491 2idl1 14492 baspartn 14739 bastg 14750 isopn3 14814 restbasg 14857 lmss 14935 metrest 15195 tgioo 15243 dvmulxxbr 15391 elply2 15424 pilem3 15472 2sqlem7 15815 |
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