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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 3388 | . 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 3197 |
| 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 2802 df-in 3204 |
| This theorem is referenced by: fnfvimad 5885 elfir 7163 infpwfidom 7399 nninfdclemcl 13059 nninfdclemp1 13061 strslfv2d 13115 bassetsnn 13129 insubm 13558 2idl0 14516 2idl1 14517 baspartn 14764 bastg 14775 isopn3 14839 restbasg 14882 lmss 14960 metrest 15220 tgioo 15268 dvmulxxbr 15416 elply2 15449 pilem3 15497 2sqlem7 15840 |
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