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Theorem elbl2ps 12550
Description: Membership in a ball. (Contributed by NM, 9-Mar-2007.) (Revised by Thierry Arnoux, 11-Mar-2018.)
Assertion
Ref Expression
elbl2ps  |-  ( ( ( D  e.  (PsMet `  X )  /\  R  e.  RR* )  /\  ( P  e.  X  /\  A  e.  X )
)  ->  ( A  e.  ( P ( ball `  D ) R )  <-> 
( P D A )  <  R ) )

Proof of Theorem elbl2ps
StepHypRef Expression
1 elblps 12548 . . . . 5  |-  ( ( D  e.  (PsMet `  X )  /\  P  e.  X  /\  R  e. 
RR* )  ->  ( A  e.  ( P
( ball `  D ) R )  <->  ( A  e.  X  /\  ( P D A )  < 
R ) ) )
213expa 1181 . . . 4  |-  ( ( ( D  e.  (PsMet `  X )  /\  P  e.  X )  /\  R  e.  RR* )  ->  ( A  e.  ( P
( ball `  D ) R )  <->  ( A  e.  X  /\  ( P D A )  < 
R ) ) )
32an32s 557 . . 3  |-  ( ( ( D  e.  (PsMet `  X )  /\  R  e.  RR* )  /\  P  e.  X )  ->  ( A  e.  ( P
( ball `  D ) R )  <->  ( A  e.  X  /\  ( P D A )  < 
R ) ) )
43adantrr 470 . 2  |-  ( ( ( D  e.  (PsMet `  X )  /\  R  e.  RR* )  /\  ( P  e.  X  /\  A  e.  X )
)  ->  ( A  e.  ( P ( ball `  D ) R )  <-> 
( A  e.  X  /\  ( P D A )  <  R ) ) )
5 simprr 521 . . 3  |-  ( ( ( D  e.  (PsMet `  X )  /\  R  e.  RR* )  /\  ( P  e.  X  /\  A  e.  X )
)  ->  A  e.  X )
65biantrurd 303 . 2  |-  ( ( ( D  e.  (PsMet `  X )  /\  R  e.  RR* )  /\  ( P  e.  X  /\  A  e.  X )
)  ->  ( ( P D A )  < 
R  <->  ( A  e.  X  /\  ( P D A )  < 
R ) ) )
74, 6bitr4d 190 1  |-  ( ( ( D  e.  (PsMet `  X )  /\  R  e.  RR* )  /\  ( P  e.  X  /\  A  e.  X )
)  ->  ( A  e.  ( P ( ball `  D ) R )  <-> 
( P D A )  <  R ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    e. wcel 1480   class class class wbr 3924   ` cfv 5118  (class class class)co 5767   RR*cxr 7792    < clt 7793  PsMetcpsmet 12137   ballcbl 12140
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 603  ax-in2 604  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-13 1491  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119  ax-sep 4041  ax-pow 4093  ax-pr 4126  ax-un 4350  ax-setind 4447  ax-cnex 7704  ax-resscn 7705
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-fal 1337  df-nf 1437  df-sb 1736  df-eu 2000  df-mo 2001  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ne 2307  df-ral 2419  df-rex 2420  df-rab 2423  df-v 2683  df-sbc 2905  df-csb 2999  df-dif 3068  df-un 3070  df-in 3072  df-ss 3079  df-pw 3507  df-sn 3528  df-pr 3529  df-op 3531  df-uni 3732  df-iun 3810  df-br 3925  df-opab 3985  df-mpt 3986  df-id 4210  df-xp 4540  df-rel 4541  df-cnv 4542  df-co 4543  df-dm 4544  df-rn 4545  df-res 4546  df-ima 4547  df-iota 5083  df-fun 5120  df-fn 5121  df-f 5122  df-fv 5126  df-ov 5770  df-oprab 5771  df-mpo 5772  df-1st 6031  df-2nd 6032  df-map 6537  df-pnf 7795  df-mnf 7796  df-xr 7797  df-psmet 12145  df-bl 12148
This theorem is referenced by:  elbl3ps  12552  blcomps  12554
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