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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 3412 | . 2 ⊢ (𝑋 ∈ (𝐴 ∩ 𝐵) ↔ (𝑋 ∈ 𝐴 ∧ 𝑋 ∈ 𝐵)) | |
| 4 | 1, 2, 3 | sylanbrc 421 | 1 ⊢ (𝜑 → 𝑋 ∈ (𝐴 ∩ 𝐵)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 ∩ cin 3219 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-in 3226 |
| This theorem is used by: fnfvimad 5957 elfir 7312 infpwfidom 7556 hashfibclem 11303 ballotfilem2 13285 nninfdclemcl 13396 nninfdclemp1 13398 strslfv2d 13452 bassetsnn 13466 insubm 13850 2idl0 14957 2idl1 14958 aspval 15123 asplss 15124 aspsubrg 15126 baspartn 15293 bastg 15304 isopn3 15368 restbasg 15411 lmss 15489 metrest 15749 tgioo 15797 dvmulxxbr 15945 elply2 15978 pilem3 16027 ppiqsval 16257 ppiqsval2 16258 ppinprm 16277 chtnprm 16279 2sqlem7 16462 |
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