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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 4933 | . 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 1541 ∈ wcel 2202 Vcvv 2803 〈cop 3676 dom cdm 4731 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-v 2805 df-un 3205 df-sn 3679 df-pr 3680 df-op 3682 df-br 4094 df-dm 4741 |
| This theorem is referenced by: dmss 4936 opeldm 4940 dmin 4945 dmiun 4946 dmuni 4947 dm0 4951 reldm0 4955 reldmm 4956 dmrnssfld 5001 dmcoss 5008 dmcosseq 5010 dmres 5040 iss 5065 dmxpss 5174 dmsnopg 5215 relssdmrn 5264 funssres 5376 fun11iun 5613 tfrlemibxssdm 6536 tfr1onlembxssdm 6552 tfrcllembxssdm 6565 fnpr2ob 13503 |
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