ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  blfn GIF version

Theorem blfn 14558
Description: The ball function has universal domain. (Contributed by Jim Kingdon, 24-Sep-2025.)
Assertion
Ref Expression
blfn ball Fn V

Proof of Theorem blfn
Dummy variables 𝑥 𝑑 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 vex 2803 . . . . 5 𝑑 ∈ V
21dmex 4997 . . . 4 dom 𝑑 ∈ V
32dmex 4997 . . 3 dom dom 𝑑 ∈ V
4 xrex 10084 . . 3 * ∈ V
53, 4mpoex 6374 . 2 (𝑥 ∈ dom dom 𝑑, 𝑧 ∈ ℝ* ↦ {𝑦 ∈ dom dom 𝑑 ∣ (𝑥𝑑𝑦) < 𝑧}) ∈ V
6 df-bl 14553 . 2 ball = (𝑑 ∈ V ↦ (𝑥 ∈ dom dom 𝑑, 𝑧 ∈ ℝ* ↦ {𝑦 ∈ dom dom 𝑑 ∣ (𝑥𝑑𝑦) < 𝑧}))
75, 6fnmpti 5458 1 ball Fn V
Colors of variables: wff set class
Syntax hints:  {crab 2512  Vcvv 2800   class class class wbr 4086  dom cdm 4723   Fn wfn 5319  (class class class)co 6013  cmpo 6015  *cxr 8206   < clt 8207  ballcbl 14545
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4202  ax-sep 4205  ax-pow 4262  ax-pr 4297  ax-un 4528  ax-cnex 8116  ax-resscn 8117
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2802  df-sbc 3030  df-csb 3126  df-un 3202  df-in 3204  df-ss 3211  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-iun 3970  df-br 4087  df-opab 4149  df-mpt 4150  df-id 4388  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-rn 4734  df-res 4735  df-ima 4736  df-iota 5284  df-fun 5326  df-fn 5327  df-f 5328  df-f1 5329  df-fo 5330  df-f1o 5331  df-fv 5332  df-oprab 6017  df-mpo 6018  df-1st 6298  df-2nd 6299  df-pnf 8209  df-mnf 8210  df-xr 8211  df-bl 14553
This theorem is referenced by:  mopnset  14559
  Copyright terms: Public domain W3C validator