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Theorem blrnps 13782
Description: Membership in the range of the ball function. Note that ran (ballβ€˜π·) is the collection of all balls for metric 𝐷. (Contributed by NM, 31-Aug-2006.) (Revised by Mario Carneiro, 12-Nov-2013.) (Revised by Thierry Arnoux, 11-Mar-2018.)
Assertion
Ref Expression
blrnps (𝐷 ∈ (PsMetβ€˜π‘‹) β†’ (𝐴 ∈ ran (ballβ€˜π·) ↔ βˆƒπ‘₯ ∈ 𝑋 βˆƒπ‘Ÿ ∈ ℝ* 𝐴 = (π‘₯(ballβ€˜π·)π‘Ÿ)))
Distinct variable groups:   π‘₯,π‘Ÿ,𝐴   𝐷,π‘Ÿ,π‘₯   𝑋,π‘Ÿ,π‘₯

Proof of Theorem blrnps
StepHypRef Expression
1 blfps 13780 . 2 (𝐷 ∈ (PsMetβ€˜π‘‹) β†’ (ballβ€˜π·):(𝑋 Γ— ℝ*)βŸΆπ’« 𝑋)
2 ffn 5364 . 2 ((ballβ€˜π·):(𝑋 Γ— ℝ*)βŸΆπ’« 𝑋 β†’ (ballβ€˜π·) Fn (𝑋 Γ— ℝ*))
3 ovelrn 6020 . 2 ((ballβ€˜π·) Fn (𝑋 Γ— ℝ*) β†’ (𝐴 ∈ ran (ballβ€˜π·) ↔ βˆƒπ‘₯ ∈ 𝑋 βˆƒπ‘Ÿ ∈ ℝ* 𝐴 = (π‘₯(ballβ€˜π·)π‘Ÿ)))
41, 2, 33syl 17 1 (𝐷 ∈ (PsMetβ€˜π‘‹) β†’ (𝐴 ∈ ran (ballβ€˜π·) ↔ βˆƒπ‘₯ ∈ 𝑋 βˆƒπ‘Ÿ ∈ ℝ* 𝐴 = (π‘₯(ballβ€˜π·)π‘Ÿ)))
Colors of variables: wff set class
Syntax hints:   β†’ wi 4   ↔ wb 105   = wceq 1353   ∈ wcel 2148  βˆƒwrex 2456  π’« cpw 3575   Γ— cxp 4623  ran crn 4626   Fn wfn 5210  βŸΆwf 5211  β€˜cfv 5215  (class class class)co 5872  β„*cxr 7987  PsMetcpsmet 13308  ballcbl 13311
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-in1 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-sep 4120  ax-pow 4173  ax-pr 4208  ax-un 4432  ax-setind 4535  ax-cnex 7899  ax-resscn 7900
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ne 2348  df-ral 2460  df-rex 2461  df-rab 2464  df-v 2739  df-sbc 2963  df-csb 3058  df-dif 3131  df-un 3133  df-in 3135  df-ss 3142  df-pw 3577  df-sn 3598  df-pr 3599  df-op 3601  df-uni 3810  df-iun 3888  df-br 4003  df-opab 4064  df-mpt 4065  df-id 4292  df-xp 4631  df-rel 4632  df-cnv 4633  df-co 4634  df-dm 4635  df-rn 4636  df-res 4637  df-ima 4638  df-iota 5177  df-fun 5217  df-fn 5218  df-f 5219  df-fv 5223  df-ov 5875  df-oprab 5876  df-mpo 5877  df-1st 6138  df-2nd 6139  df-map 6647  df-pnf 7990  df-mnf 7991  df-xr 7992  df-psmet 13316  df-bl 13319
This theorem is referenced by:  blssps  13798
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