| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 5296 | . 2 ⊢ Fun {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 = 𝐵)} | |
| 2 | df-mpt 4097 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 = 𝐵)} | |
| 3 | 2 | funeqi 5280 | . 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 1364 ∈ wcel 2167 {copab 4094 ↦ cmpt 4095 Fun wfun 5253 |
| 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-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-v 2765 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-br 4035 df-opab 4096 df-mpt 4097 df-id 4329 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-fun 5261 |
| This theorem is referenced by: funmpt2 5298 fmptco 5731 resfunexg 5786 mptexg 5790 mptexw 6179 brtpos2 6318 tposfun 6327 rdgtfr 6441 rdgruledefgg 6442 rdgon 6453 freccllem 6469 frecfcllem 6471 hashinfom 10887 hashennn 10889 negfi 11410 tgrest 14489 dvrecap 15033 funmptd 15533 |
| Copyright terms: Public domain | W3C validator |