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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 2815 | . . . . 5 ⊢ 𝑑 ∈ V | |
| 2 | 1 | dmex 5023 | . . . 4 ⊢ dom 𝑑 ∈ V |
| 3 | 2 | dmex 5023 | . . 3 ⊢ dom dom 𝑑 ∈ V |
| 4 | xrex 10185 | . . 3 ⊢ ℝ* ∈ V | |
| 5 | 3, 4 | mpoex 6409 | . 2 ⊢ (𝑥 ∈ dom dom 𝑑, 𝑧 ∈ ℝ* ↦ {𝑦 ∈ dom dom 𝑑 ∣ (𝑥𝑑𝑦) < 𝑧}) ∈ V |
| 6 | df-bl 14681 | . 2 ⊢ ball = (𝑑 ∈ V ↦ (𝑥 ∈ dom dom 𝑑, 𝑧 ∈ ℝ* ↦ {𝑦 ∈ dom dom 𝑑 ∣ (𝑥𝑑𝑦) < 𝑧})) | |
| 7 | 5, 6 | fnmpti 5486 | 1 ⊢ ball Fn V |
| Colors of variables: wff set class |
| Syntax hints: {crab 2524 Vcvv 2812 class class class wbr 4108 dom cdm 4748 Fn wfn 5346 (class class class)co 6049 ∈ cmpo 6051 ℝ*cxr 8303 < clt 8304 ballcbl 14673 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-coll 4224 ax-sep 4227 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-cnex 8214 ax-resscn 8215 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ral 2525 df-rex 2526 df-reu 2527 df-rab 2529 df-v 2814 df-sbc 3042 df-csb 3138 df-un 3214 df-in 3216 df-ss 3223 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-iun 3992 df-br 4109 df-opab 4171 df-mpt 4172 df-id 4413 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-ima 4761 df-iota 5311 df-fun 5353 df-fn 5354 df-f 5355 df-f1 5356 df-fo 5357 df-f1o 5358 df-fv 5359 df-oprab 6053 df-mpo 6054 df-1st 6333 df-2nd 6334 df-pnf 8306 df-mnf 8307 df-xr 8308 df-bl 14681 |
| This theorem is referenced by: mopnset 14687 |
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