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Theorem blsscls2 20880
Description: A smaller closed ball is contained in a larger open ball. (Contributed by Mario Carneiro, 10-Jan-2014.)
Hypotheses
Ref Expression
mopni.1  |-  J  =  ( MetOpen `  D )
blcld.3  |-  S  =  { z  e.  X  |  ( P D z )  <_  R }
Assertion
Ref Expression
blsscls2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  ->  S  C_  ( P (
ball `  D ) T ) )
Distinct variable groups:    z, D    z, R    z, P    z, T    z, X
Allowed substitution hints:    S( z)    J( z)

Proof of Theorem blsscls2
StepHypRef Expression
1 blcld.3 . 2  |-  S  =  { z  e.  X  |  ( P D z )  <_  R }
2 simplr3 1041 . . . . . 6  |-  ( ( ( ( D  e.  ( *Met `  X )  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  /\  z  e.  X )  ->  R  <  T )
3 xmetcl 20707 . . . . . . . . 9  |-  ( ( D  e.  ( *Met `  X )  /\  P  e.  X  /\  z  e.  X
)  ->  ( P D z )  e. 
RR* )
433expa 1197 . . . . . . . 8  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X )  /\  z  e.  X )  ->  ( P D z )  e. 
RR* )
54adantlr 714 . . . . . . 7  |-  ( ( ( ( D  e.  ( *Met `  X )  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  /\  z  e.  X )  ->  ( P D z )  e.  RR* )
6 simplr1 1039 . . . . . . 7  |-  ( ( ( ( D  e.  ( *Met `  X )  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  /\  z  e.  X )  ->  R  e.  RR* )
7 simplr2 1040 . . . . . . 7  |-  ( ( ( ( D  e.  ( *Met `  X )  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  /\  z  e.  X )  ->  T  e.  RR* )
8 xrlelttr 11368 . . . . . . . 8  |-  ( ( ( P D z )  e.  RR*  /\  R  e.  RR*  /\  T  e. 
RR* )  ->  (
( ( P D z )  <_  R  /\  R  <  T )  ->  ( P D z )  <  T
) )
98expcomd 438 . . . . . . 7  |-  ( ( ( P D z )  e.  RR*  /\  R  e.  RR*  /\  T  e. 
RR* )  ->  ( R  <  T  ->  (
( P D z )  <_  R  ->  ( P D z )  <  T ) ) )
105, 6, 7, 9syl3anc 1229 . . . . . 6  |-  ( ( ( ( D  e.  ( *Met `  X )  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  /\  z  e.  X )  ->  ( R  <  T  ->  ( ( P D z )  <_  R  ->  ( P D z )  <  T ) ) )
112, 10mpd 15 . . . . 5  |-  ( ( ( ( D  e.  ( *Met `  X )  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  /\  z  e.  X )  ->  ( ( P D z )  <_  R  ->  ( P D z )  <  T ) )
12 simp2 998 . . . . . . 7  |-  ( ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T )  ->  T  e.  RR* )
13 elbl2 20766 . . . . . . . 8  |-  ( ( ( D  e.  ( *Met `  X
)  /\  T  e.  RR* )  /\  ( P  e.  X  /\  z  e.  X ) )  -> 
( z  e.  ( P ( ball `  D
) T )  <->  ( P D z )  < 
T ) )
1413an4s 826 . . . . . . 7  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X )  /\  ( T  e.  RR*  /\  z  e.  X ) )  -> 
( z  e.  ( P ( ball `  D
) T )  <->  ( P D z )  < 
T ) )
1512, 14sylanr1 652 . . . . . 6  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X )  /\  (
( R  e.  RR*  /\  T  e.  RR*  /\  R  <  T )  /\  z  e.  X ) )  -> 
( z  e.  ( P ( ball `  D
) T )  <->  ( P D z )  < 
T ) )
1615anassrs 648 . . . . 5  |-  ( ( ( ( D  e.  ( *Met `  X )  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  /\  z  e.  X )  ->  ( z  e.  ( P ( ball `  D
) T )  <->  ( P D z )  < 
T ) )
1711, 16sylibrd 234 . . . 4  |-  ( ( ( ( D  e.  ( *Met `  X )  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  /\  z  e.  X )  ->  ( ( P D z )  <_  R  ->  z  e.  ( P ( ball `  D
) T ) ) )
1817ralrimiva 2857 . . 3  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  ->  A. z  e.  X  ( ( P D z )  <_  R  ->  z  e.  ( P ( ball `  D
) T ) ) )
19 rabss 3562 . . 3  |-  ( { z  e.  X  | 
( P D z )  <_  R }  C_  ( P ( ball `  D ) T )  <->  A. z  e.  X  ( ( P D z )  <_  R  ->  z  e.  ( P ( ball `  D
) T ) ) )
2018, 19sylibr 212 . 2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  ->  { z  e.  X  |  ( P D z )  <_  R }  C_  ( P (
ball `  D ) T ) )
211, 20syl5eqss 3533 1  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X )  /\  ( R  e.  RR*  /\  T  e.  RR*  /\  R  < 
T ) )  ->  S  C_  ( P (
ball `  D ) T ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    <-> wb 184    /\ wa 369    /\ w3a 974    = wceq 1383    e. wcel 1804   A.wral 2793   {crab 2797    C_ wss 3461   class class class wbr 4437   ` cfv 5578  (class class class)co 6281   RR*cxr 9630    < clt 9631    <_ cle 9632   *Metcxmt 18277   ballcbl 18279   MetOpencmopn 18282
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1605  ax-4 1618  ax-5 1691  ax-6 1734  ax-7 1776  ax-8 1806  ax-9 1808  ax-10 1823  ax-11 1828  ax-12 1840  ax-13 1985  ax-ext 2421  ax-sep 4558  ax-nul 4566  ax-pow 4615  ax-pr 4676  ax-un 6577  ax-cnex 9551  ax-resscn 9552  ax-pre-lttri 9569  ax-pre-lttrn 9570
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3or 975  df-3an 976  df-tru 1386  df-ex 1600  df-nf 1604  df-sb 1727  df-eu 2272  df-mo 2273  df-clab 2429  df-cleq 2435  df-clel 2438  df-nfc 2593  df-ne 2640  df-nel 2641  df-ral 2798  df-rex 2799  df-rab 2802  df-v 3097  df-sbc 3314  df-csb 3421  df-dif 3464  df-un 3466  df-in 3468  df-ss 3475  df-nul 3771  df-if 3927  df-pw 3999  df-sn 4015  df-pr 4017  df-op 4021  df-uni 4235  df-iun 4317  df-br 4438  df-opab 4496  df-mpt 4497  df-id 4785  df-po 4790  df-so 4791  df-xp 4995  df-rel 4996  df-cnv 4997  df-co 4998  df-dm 4999  df-rn 5000  df-res 5001  df-ima 5002  df-iota 5541  df-fun 5580  df-fn 5581  df-f 5582  df-f1 5583  df-fo 5584  df-f1o 5585  df-fv 5586  df-ov 6284  df-oprab 6285  df-mpt2 6286  df-1st 6785  df-2nd 6786  df-er 7313  df-map 7424  df-en 7519  df-dom 7520  df-sdom 7521  df-pnf 9633  df-mnf 9634  df-xr 9635  df-ltxr 9636  df-le 9637  df-psmet 18285  df-xmet 18286  df-bl 18288
This theorem is referenced by:  blcld  20881  blsscls  20883  ubthlem1  25658
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