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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 5365 | . 2 ⊢ Fun {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 = 𝐵)} | |
| 2 | df-mpt 4153 | . . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 = 𝐵)} | |
| 3 | 2 | funeqi 5349 | . 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 1397 ∈ wcel 2201 {copab 4150 ↦ cmpt 4151 Fun wfun 5322 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2204 ax-ext 2212 ax-sep 4208 ax-pow 4266 ax-pr 4301 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1810 df-eu 2081 df-mo 2082 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ral 2514 df-rex 2515 df-v 2803 df-un 3203 df-in 3205 df-ss 3212 df-pw 3655 df-sn 3676 df-pr 3677 df-op 3679 df-br 4090 df-opab 4152 df-mpt 4153 df-id 4392 df-xp 4733 df-rel 4734 df-cnv 4735 df-co 4736 df-fun 5330 |
| This theorem is referenced by: funmpt2 5367 fmptco 5816 resfunexg 5878 mptexg 5884 mptexw 6280 brtpos2 6422 tposfun 6431 rdgtfr 6545 rdgruledefgg 6546 rdgon 6557 freccllem 6573 frecfcllem 6575 hashinfom 11046 hashennn 11048 ccatalpha 11199 negfi 11811 tgrest 14922 dvrecap 15466 funmptd 16460 |
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