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Theorem elbl2 15116
Description: Membership in a ball. (Contributed by NM, 9-Mar-2007.)
Assertion
Ref Expression
elbl2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  R  e.  RR* )  /\  ( P  e.  X  /\  A  e.  X ) )  -> 
( A  e.  ( P ( ball `  D
) R )  <->  ( P D A )  <  R
) )

Proof of Theorem elbl2
StepHypRef Expression
1 elbl 15114 . . . . 5  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  X  /\  R  e.  RR* )  ->  ( A  e.  ( P ( ball `  D
) R )  <->  ( A  e.  X  /\  ( P D A )  < 
R ) ) )
213expa 1229 . . . 4  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X )  /\  R  e.  RR* )  ->  ( A  e.  ( P
( ball `  D ) R )  <->  ( A  e.  X  /\  ( P D A )  < 
R ) ) )
32an32s 570 . . 3  |-  ( ( ( D  e.  ( *Met `  X
)  /\  R  e.  RR* )  /\  P  e.  X )  ->  ( A  e.  ( P
( ball `  D ) R )  <->  ( A  e.  X  /\  ( P D A )  < 
R ) ) )
43adantrr 479 . 2  |-  ( ( ( D  e.  ( *Met `  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 533 . . 3  |-  ( ( ( D  e.  ( *Met `  X
)  /\  R  e.  RR* )  /\  ( P  e.  X  /\  A  e.  X ) )  ->  A  e.  X )
65biantrurd 305 . 2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  R  e.  RR* )  /\  ( P  e.  X  /\  A  e.  X ) )  -> 
( ( P D A )  <  R  <->  ( A  e.  X  /\  ( P D A )  <  R ) ) )
74, 6bitr4d 191 1  |-  ( ( ( D  e.  ( *Met `  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 104    <-> wb 105    e. wcel 2202   class class class wbr 4088   ` cfv 5326  (class class class)co 6017   RR*cxr 8212    < clt 8213   *Metcxmet 14549   ballcbl 14551
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 619  ax-in2 620  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 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-cnex 8122  ax-resscn 8123
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-iun 3972  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-fv 5334  df-ov 6020  df-oprab 6021  df-mpo 6022  df-1st 6302  df-2nd 6303  df-map 6818  df-pnf 8215  df-mnf 8216  df-xr 8217  df-psmet 14556  df-xmet 14557  df-bl 14559
This theorem is referenced by:  elbl3  15118  blcom  15120  blsscls2  15216  metcnp  15235  limcimolemlt  15387
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