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| Mirrors > Home > ILE Home > Th. List > blfn | GIF version | ||
| Description: The ball function has universal domain. (Contributed by Jim Kingdon, 24-Sep-2025.) |
| Ref | Expression |
|---|---|
| blfn | ⊢ ball Fn V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | vex 2766 | . . . . 5 ⊢ 𝑑 ∈ V | |
| 2 | 1 | dmex 4933 | . . . 4 ⊢ dom 𝑑 ∈ V |
| 3 | 2 | dmex 4933 | . . 3 ⊢ dom dom 𝑑 ∈ V |
| 4 | xrex 9948 | . . 3 ⊢ ℝ* ∈ V | |
| 5 | 3, 4 | mpoex 6281 | . 2 ⊢ (𝑥 ∈ dom dom 𝑑, 𝑧 ∈ ℝ* ↦ {𝑦 ∈ dom dom 𝑑 ∣ (𝑥𝑑𝑦) < 𝑧}) ∈ V |
| 6 | df-bl 14178 | . 2 ⊢ ball = (𝑑 ∈ V ↦ (𝑥 ∈ dom dom 𝑑, 𝑧 ∈ ℝ* ↦ {𝑦 ∈ dom dom 𝑑 ∣ (𝑥𝑑𝑦) < 𝑧})) | |
| 7 | 5, 6 | fnmpti 5389 | 1 ⊢ ball Fn V |
| Colors of variables: wff set class |
| Syntax hints: {crab 2479 Vcvv 2763 class class class wbr 4034 dom cdm 4664 Fn wfn 5254 (class class class)co 5925 ∈ cmpo 5927 ℝ*cxr 8077 < clt 8078 ballcbl 14170 |
| 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-13 2169 ax-14 2170 ax-ext 2178 ax-coll 4149 ax-sep 4152 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-cnex 7987 ax-resscn 7988 |
| 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-reu 2482 df-rab 2484 df-v 2765 df-sbc 2990 df-csb 3085 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-iun 3919 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-dm 4674 df-rn 4675 df-res 4676 df-ima 4677 df-iota 5220 df-fun 5261 df-fn 5262 df-f 5263 df-f1 5264 df-fo 5265 df-f1o 5266 df-fv 5267 df-oprab 5929 df-mpo 5930 df-1st 6207 df-2nd 6208 df-pnf 8080 df-mnf 8081 df-xr 8082 df-bl 14178 |
| This theorem is referenced by: mopnset 14184 |
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