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Theorem blres 13228
Description: A ball in a restricted metric space. (Contributed by Mario Carneiro, 5-Jan-2014.)
Hypothesis
Ref Expression
blres.2  |-  C  =  ( D  |`  ( Y  X.  Y ) )
Assertion
Ref Expression
blres  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  ( X  i^i  Y )  /\  R  e.  RR* )  ->  ( P (
ball `  C ) R )  =  ( ( P ( ball `  D ) R )  i^i  Y ) )

Proof of Theorem blres
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 elinel2 3314 . . . . . . . . 9  |-  ( P  e.  ( X  i^i  Y )  ->  P  e.  Y )
2 blres.2 . . . . . . . . . . 11  |-  C  =  ( D  |`  ( Y  X.  Y ) )
32oveqi 5866 . . . . . . . . . 10  |-  ( P C x )  =  ( P ( D  |`  ( Y  X.  Y
) ) x )
4 ovres 5992 . . . . . . . . . 10  |-  ( ( P  e.  Y  /\  x  e.  Y )  ->  ( P ( D  |`  ( Y  X.  Y
) ) x )  =  ( P D x ) )
53, 4eqtrid 2215 . . . . . . . . 9  |-  ( ( P  e.  Y  /\  x  e.  Y )  ->  ( P C x )  =  ( P D x ) )
61, 5sylan 281 . . . . . . . 8  |-  ( ( P  e.  ( X  i^i  Y )  /\  x  e.  Y )  ->  ( P C x )  =  ( P D x ) )
76breq1d 3999 . . . . . . 7  |-  ( ( P  e.  ( X  i^i  Y )  /\  x  e.  Y )  ->  ( ( P C x )  <  R  <->  ( P D x )  <  R ) )
87anbi2d 461 . . . . . 6  |-  ( ( P  e.  ( X  i^i  Y )  /\  x  e.  Y )  ->  ( ( x  e.  X  /\  ( P C x )  < 
R )  <->  ( x  e.  X  /\  ( P D x )  < 
R ) ) )
98pm5.32da 449 . . . . 5  |-  ( P  e.  ( X  i^i  Y )  ->  ( (
x  e.  Y  /\  ( x  e.  X  /\  ( P C x )  <  R ) )  <->  ( x  e.  Y  /\  ( x  e.  X  /\  ( P D x )  < 
R ) ) ) )
1093ad2ant2 1014 . . . 4  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  ( X  i^i  Y )  /\  R  e.  RR* )  ->  ( ( x  e.  Y  /\  (
x  e.  X  /\  ( P C x )  <  R ) )  <-> 
( x  e.  Y  /\  ( x  e.  X  /\  ( P D x )  <  R ) ) ) )
11 elin 3310 . . . . . . 7  |-  ( x  e.  ( X  i^i  Y )  <->  ( x  e.  X  /\  x  e.  Y ) )
12 ancom 264 . . . . . . 7  |-  ( ( x  e.  X  /\  x  e.  Y )  <->  ( x  e.  Y  /\  x  e.  X )
)
1311, 12bitri 183 . . . . . 6  |-  ( x  e.  ( X  i^i  Y )  <->  ( x  e.  Y  /\  x  e.  X ) )
1413anbi1i 455 . . . . 5  |-  ( ( x  e.  ( X  i^i  Y )  /\  ( P C x )  <  R )  <->  ( (
x  e.  Y  /\  x  e.  X )  /\  ( P C x )  <  R ) )
15 anass 399 . . . . 5  |-  ( ( ( x  e.  Y  /\  x  e.  X
)  /\  ( P C x )  < 
R )  <->  ( x  e.  Y  /\  (
x  e.  X  /\  ( P C x )  <  R ) ) )
1614, 15bitri 183 . . . 4  |-  ( ( x  e.  ( X  i^i  Y )  /\  ( P C x )  <  R )  <->  ( x  e.  Y  /\  (
x  e.  X  /\  ( P C x )  <  R ) ) )
17 ancom 264 . . . 4  |-  ( ( ( x  e.  X  /\  ( P D x )  <  R )  /\  x  e.  Y
)  <->  ( x  e.  Y  /\  ( x  e.  X  /\  ( P D x )  < 
R ) ) )
1810, 16, 173bitr4g 222 . . 3  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  ( X  i^i  Y )  /\  R  e.  RR* )  ->  ( ( x  e.  ( X  i^i  Y )  /\  ( P C x )  < 
R )  <->  ( (
x  e.  X  /\  ( P D x )  <  R )  /\  x  e.  Y )
) )
19 xmetres 13176 . . . . 5  |-  ( D  e.  ( *Met `  X )  ->  ( D  |`  ( Y  X.  Y ) )  e.  ( *Met `  ( X  i^i  Y ) ) )
202, 19eqeltrid 2257 . . . 4  |-  ( D  e.  ( *Met `  X )  ->  C  e.  ( *Met `  ( X  i^i  Y ) ) )
21 elbl 13185 . . . 4  |-  ( ( C  e.  ( *Met `  ( X  i^i  Y ) )  /\  P  e.  ( X  i^i  Y )  /\  R  e.  RR* )  ->  ( x  e.  ( P ( ball `  C ) R )  <-> 
( x  e.  ( X  i^i  Y )  /\  ( P C x )  <  R
) ) )
2220, 21syl3an1 1266 . . 3  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  ( X  i^i  Y )  /\  R  e.  RR* )  ->  ( x  e.  ( P ( ball `  C ) R )  <-> 
( x  e.  ( X  i^i  Y )  /\  ( P C x )  <  R
) ) )
23 elin 3310 . . . 4  |-  ( x  e.  ( ( P ( ball `  D
) R )  i^i 
Y )  <->  ( x  e.  ( P ( ball `  D ) R )  /\  x  e.  Y
) )
24 elinel1 3313 . . . . . 6  |-  ( P  e.  ( X  i^i  Y )  ->  P  e.  X )
25 elbl 13185 . . . . . 6  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  X  /\  R  e.  RR* )  ->  ( x  e.  ( P ( ball `  D
) R )  <->  ( x  e.  X  /\  ( P D x )  < 
R ) ) )
2624, 25syl3an2 1267 . . . . 5  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  ( X  i^i  Y )  /\  R  e.  RR* )  ->  ( x  e.  ( P ( ball `  D ) R )  <-> 
( x  e.  X  /\  ( P D x )  <  R ) ) )
2726anbi1d 462 . . . 4  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  ( X  i^i  Y )  /\  R  e.  RR* )  ->  ( ( x  e.  ( P (
ball `  D ) R )  /\  x  e.  Y )  <->  ( (
x  e.  X  /\  ( P D x )  <  R )  /\  x  e.  Y )
) )
2823, 27syl5bb 191 . . 3  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  ( X  i^i  Y )  /\  R  e.  RR* )  ->  ( x  e.  ( ( P (
ball `  D ) R )  i^i  Y
)  <->  ( ( x  e.  X  /\  ( P D x )  < 
R )  /\  x  e.  Y ) ) )
2918, 22, 283bitr4d 219 . 2  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  ( X  i^i  Y )  /\  R  e.  RR* )  ->  ( x  e.  ( P ( ball `  C ) R )  <-> 
x  e.  ( ( P ( ball `  D
) R )  i^i 
Y ) ) )
3029eqrdv 2168 1  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  ( X  i^i  Y )  /\  R  e.  RR* )  ->  ( P (
ball `  C ) R )  =  ( ( P ( ball `  D ) R )  i^i  Y ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    /\ w3a 973    = wceq 1348    e. wcel 2141    i^i cin 3120   class class class wbr 3989    X. cxp 4609    |` cres 4613   ` cfv 5198  (class class class)co 5853   RR*cxr 7953    < clt 7954   *Metcxmet 12774   ballcbl 12776
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 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-cnex 7865  ax-resscn 7866
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-ral 2453  df-rex 2454  df-rab 2457  df-v 2732  df-sbc 2956  df-csb 3050  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-iun 3875  df-br 3990  df-opab 4051  df-mpt 4052  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-res 4623  df-ima 4624  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  df-fv 5206  df-ov 5856  df-oprab 5857  df-mpo 5858  df-1st 6119  df-2nd 6120  df-map 6628  df-pnf 7956  df-mnf 7957  df-xr 7958  df-psmet 12781  df-xmet 12782  df-bl 12784
This theorem is referenced by:  metrest  13300
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