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| Mirrors > Home > ILE Home > Th. List > dmmptss | GIF version | ||
| Description: The domain of a mapping is a subset of its base class. (Contributed by Scott Fenton, 17-Jun-2013.) |
| Ref | Expression |
|---|---|
| dmmpo.1 | ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) |
| Ref | Expression |
|---|---|
| dmmptss | ⊢ dom 𝐹 ⊆ 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmmpo.1 | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 2 | 1 | dmmpt 5187 | . 2 ⊢ dom 𝐹 = {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ V} |
| 3 | ssrab2 3282 | . 2 ⊢ {𝑥 ∈ 𝐴 ∣ 𝐵 ∈ V} ⊆ 𝐴 | |
| 4 | 2, 3 | eqsstri 3229 | 1 ⊢ dom 𝐹 ⊆ 𝐴 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1373 ∈ wcel 2177 {crab 2489 Vcvv 2773 ⊆ wss 3170 ↦ cmpt 4113 dom cdm 4683 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-14 2180 ax-ext 2188 ax-sep 4170 ax-pow 4226 ax-pr 4261 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ral 2490 df-rex 2491 df-rab 2494 df-v 2775 df-un 3174 df-in 3176 df-ss 3183 df-pw 3623 df-sn 3644 df-pr 3645 df-op 3647 df-br 4052 df-opab 4114 df-mpt 4115 df-xp 4689 df-rel 4690 df-cnv 4691 df-dm 4693 df-rn 4694 df-res 4695 df-ima 4696 |
| This theorem is referenced by: mptrcl 5675 fvmptssdm 5677 elfvmptrab1 5687 mptexg 5822 mptexw 6211 dmmpossx 6298 tposssxp 6348 lmrcl 14738 cnprcl2k 14753 isxms2 14999 |
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