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| Mirrors > Home > ILE Home > Th. List > funmpt | GIF version | ||
| Description: A function in maps-to notation is a function. (Contributed by Mario Carneiro, 13-Jan-2013.) |
| Ref | Expression |
|---|---|
| funmpt | ⊢ Fun (𝑥 ∈ 𝐴 ↦ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funopab4 5331 | . 2 ⊢ Fun {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 = 𝐵)} | |
| 2 | df-mpt 4126 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 = 𝐵)} | |
| 3 | 2 | funeqi 5315 | . 2 ⊢ (Fun (𝑥 ∈ 𝐴 ↦ 𝐵) ↔ Fun {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 = 𝐵)}) |
| 4 | 1, 3 | mpbir 146 | 1 ⊢ Fun (𝑥 ∈ 𝐴 ↦ 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 = wceq 1375 ∈ wcel 2180 {copab 4123 ↦ cmpt 4124 Fun wfun 5288 |
| 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 713 ax-5 1473 ax-7 1474 ax-gen 1475 ax-ie1 1519 ax-ie2 1520 ax-8 1530 ax-10 1531 ax-11 1532 ax-i12 1533 ax-bndl 1535 ax-4 1536 ax-17 1552 ax-i9 1556 ax-ial 1560 ax-i5r 1561 ax-14 2183 ax-ext 2191 ax-sep 4181 ax-pow 4237 ax-pr 4272 |
| This theorem depends on definitions: df-bi 117 df-3an 985 df-tru 1378 df-nf 1487 df-sb 1789 df-eu 2060 df-mo 2061 df-clab 2196 df-cleq 2202 df-clel 2205 df-nfc 2341 df-ral 2493 df-rex 2494 df-v 2781 df-un 3181 df-in 3183 df-ss 3190 df-pw 3631 df-sn 3652 df-pr 3653 df-op 3655 df-br 4063 df-opab 4125 df-mpt 4126 df-id 4361 df-xp 4702 df-rel 4703 df-cnv 4704 df-co 4705 df-fun 5296 |
| This theorem is referenced by: funmpt2 5333 fmptco 5774 resfunexg 5833 mptexg 5837 mptexw 6228 brtpos2 6367 tposfun 6376 rdgtfr 6490 rdgruledefgg 6491 rdgon 6502 freccllem 6518 frecfcllem 6520 hashinfom 10967 hashennn 10969 negfi 11705 tgrest 14808 dvrecap 15352 funmptd 16077 |
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