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| Mirrors > Home > ILE Home > Th. List > eldm2 | GIF version | ||
| Description: Membership in a domain. Theorem 4 of [Suppes] p. 59. (Contributed by NM, 1-Aug-1994.) |
| Ref | Expression |
|---|---|
| eldm.1 | ⊢ 𝐴 ∈ V |
| Ref | Expression |
|---|---|
| eldm2 | ⊢ (𝐴 ∈ dom 𝐵 ↔ ∃𝑦〈𝐴, 𝑦〉 ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eldm.1 | . 2 ⊢ 𝐴 ∈ V | |
| 2 | eldm2g 4862 | . 2 ⊢ (𝐴 ∈ V → (𝐴 ∈ dom 𝐵 ↔ ∃𝑦〈𝐴, 𝑦〉 ∈ 𝐵)) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝐴 ∈ dom 𝐵 ↔ ∃𝑦〈𝐴, 𝑦〉 ∈ 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 105 ∃wex 1506 ∈ wcel 2167 Vcvv 2763 〈cop 3625 dom cdm 4663 |
| 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-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-v 2765 df-un 3161 df-sn 3628 df-pr 3629 df-op 3631 df-br 4034 df-dm 4673 |
| This theorem is referenced by: dmss 4865 opeldm 4869 dmin 4874 dmiun 4875 dmuni 4876 dm0 4880 reldm0 4884 dmrnssfld 4929 dmcoss 4935 dmcosseq 4937 dmres 4967 iss 4992 dmxpss 5100 dmsnopg 5141 relssdmrn 5190 funssres 5300 fun11iun 5525 tfrlemibxssdm 6385 tfr1onlembxssdm 6401 tfrcllembxssdm 6414 fnpr2ob 12983 |
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