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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 2804 | . . . . 5 ⊢ 𝑑 ∈ V | |
| 2 | 1 | dmex 5001 | . . . 4 ⊢ dom 𝑑 ∈ V |
| 3 | 2 | dmex 5001 | . . 3 ⊢ dom dom 𝑑 ∈ V |
| 4 | xrex 10096 | . . 3 ⊢ ℝ* ∈ V | |
| 5 | 3, 4 | mpoex 6384 | . 2 ⊢ (𝑥 ∈ dom dom 𝑑, 𝑧 ∈ ℝ* ↦ {𝑦 ∈ dom dom 𝑑 ∣ (𝑥𝑑𝑦) < 𝑧}) ∈ V |
| 6 | df-bl 14584 | . 2 ⊢ ball = (𝑑 ∈ V ↦ (𝑥 ∈ dom dom 𝑑, 𝑧 ∈ ℝ* ↦ {𝑦 ∈ dom dom 𝑑 ∣ (𝑥𝑑𝑦) < 𝑧})) | |
| 7 | 5, 6 | fnmpti 5463 | 1 ⊢ ball Fn V |
| Colors of variables: wff set class |
| Syntax hints: {crab 2513 Vcvv 2801 class class class wbr 4089 dom cdm 4727 Fn wfn 5323 (class class class)co 6023 ∈ cmpo 6025 ℝ*cxr 8218 < clt 8219 ballcbl 14576 |
| 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-13 2203 ax-14 2204 ax-ext 2212 ax-coll 4205 ax-sep 4208 ax-pow 4266 ax-pr 4301 ax-un 4532 ax-cnex 8128 ax-resscn 8129 |
| 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-reu 2516 df-rab 2518 df-v 2803 df-sbc 3031 df-csb 3127 df-un 3203 df-in 3205 df-ss 3212 df-pw 3655 df-sn 3676 df-pr 3677 df-op 3679 df-uni 3895 df-iun 3973 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-dm 4737 df-rn 4738 df-res 4739 df-ima 4740 df-iota 5288 df-fun 5330 df-fn 5331 df-f 5332 df-f1 5333 df-fo 5334 df-f1o 5335 df-fv 5336 df-oprab 6027 df-mpo 6028 df-1st 6308 df-2nd 6309 df-pnf 8221 df-mnf 8222 df-xr 8223 df-bl 14584 |
| This theorem is referenced by: mopnset 14590 |
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