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Theorem blss2 21073
Description: One ball is contained in another if the center-to-center distance is less than the difference of the radii. (Contributed by Mario Carneiro, 15-Jan-2014.) (Revised by Mario Carneiro, 23-Aug-2015.)
Assertion
Ref Expression
blss2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  -> 
( P ( ball `  D ) R ) 
C_  ( Q (
ball `  D ) S ) )

Proof of Theorem blss2
StepHypRef Expression
1 simpl1 997 . 2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  ->  D  e.  ( *Met `  X ) )
2 simpl2 998 . 2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  ->  P  e.  X )
3 simpl3 999 . 2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  ->  Q  e.  X )
4 simpr1 1000 . . 3  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  ->  R  e.  RR )
54rexrd 9632 . 2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  ->  R  e.  RR* )
6 simpr2 1001 . . 3  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  ->  S  e.  RR )
76rexrd 9632 . 2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  ->  S  e.  RR* )
86, 4resubcld 9983 . . 3  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  -> 
( S  -  R
)  e.  RR )
9 simpr3 1002 . . 3  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  -> 
( P D Q )  <_  ( S  -  R ) )
10 xmetlecl 21015 . . 3  |-  ( ( D  e.  ( *Met `  X )  /\  ( P  e.  X  /\  Q  e.  X )  /\  (
( S  -  R
)  e.  RR  /\  ( P D Q )  <_  ( S  -  R ) ) )  ->  ( P D Q )  e.  RR )
111, 2, 3, 8, 9, 10syl122anc 1235 . 2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  -> 
( P D Q )  e.  RR )
12 rexsub 11435 . . . 4  |-  ( ( S  e.  RR  /\  R  e.  RR )  ->  ( S +e  -e R )  =  ( S  -  R
) )
136, 4, 12syl2anc 659 . . 3  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  -> 
( S +e  -e R )  =  ( S  -  R
) )
149, 13breqtrrd 4465 . 2  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  -> 
( P D Q )  <_  ( S +e  -e R ) )
151, 2, 3, 5, 7, 11, 14xblss2 21071 1  |-  ( ( ( D  e.  ( *Met `  X
)  /\  P  e.  X  /\  Q  e.  X
)  /\  ( R  e.  RR  /\  S  e.  RR  /\  ( P D Q )  <_ 
( S  -  R
) ) )  -> 
( P ( ball `  D ) R ) 
C_  ( Q (
ball `  D ) S ) )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 367    /\ w3a 971    = wceq 1398    e. wcel 1823    C_ wss 3461   class class class wbr 4439   ` cfv 5570  (class class class)co 6270   RRcr 9480    <_ cle 9618    - cmin 9796    -ecxne 11318   +ecxad 11319   *Metcxmt 18598   ballcbl 18600
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1623  ax-4 1636  ax-5 1709  ax-6 1752  ax-7 1795  ax-8 1825  ax-9 1827  ax-10 1842  ax-11 1847  ax-12 1859  ax-13 2004  ax-ext 2432  ax-sep 4560  ax-nul 4568  ax-pow 4615  ax-pr 4676  ax-un 6565  ax-cnex 9537  ax-resscn 9538  ax-1cn 9539  ax-icn 9540  ax-addcl 9541  ax-addrcl 9542  ax-mulcl 9543  ax-mulrcl 9544  ax-mulcom 9545  ax-addass 9546  ax-mulass 9547  ax-distr 9548  ax-i2m1 9549  ax-1ne0 9550  ax-1rid 9551  ax-rnegex 9552  ax-rrecex 9553  ax-cnre 9554  ax-pre-lttri 9555  ax-pre-lttrn 9556  ax-pre-ltadd 9557  ax-pre-mulgt0 9558
This theorem depends on definitions:  df-bi 185  df-or 368  df-an 369  df-3or 972  df-3an 973  df-tru 1401  df-ex 1618  df-nf 1622  df-sb 1745  df-eu 2288  df-mo 2289  df-clab 2440  df-cleq 2446  df-clel 2449  df-nfc 2604  df-ne 2651  df-nel 2652  df-ral 2809  df-rex 2810  df-reu 2811  df-rmo 2812  df-rab 2813  df-v 3108  df-sbc 3325  df-csb 3421  df-dif 3464  df-un 3466  df-in 3468  df-ss 3475  df-nul 3784  df-if 3930  df-pw 4001  df-sn 4017  df-pr 4019  df-op 4023  df-uni 4236  df-iun 4317  df-br 4440  df-opab 4498  df-mpt 4499  df-id 4784  df-po 4789  df-so 4790  df-xp 4994  df-rel 4995  df-cnv 4996  df-co 4997  df-dm 4998  df-rn 4999  df-res 5000  df-ima 5001  df-iota 5534  df-fun 5572  df-fn 5573  df-f 5574  df-f1 5575  df-fo 5576  df-f1o 5577  df-fv 5578  df-riota 6232  df-ov 6273  df-oprab 6274  df-mpt2 6275  df-1st 6773  df-2nd 6774  df-er 7303  df-map 7414  df-en 7510  df-dom 7511  df-sdom 7512  df-pnf 9619  df-mnf 9620  df-xr 9621  df-ltxr 9622  df-le 9623  df-sub 9798  df-neg 9799  df-div 10203  df-2 10590  df-rp 11222  df-xneg 11321  df-xadd 11322  df-xmul 11323  df-psmet 18606  df-xmet 18607  df-bl 18609
This theorem is referenced by:  blhalf  21074  blss  21094  metdstri  21521  ssbnd  30524  totbndbnd  30525  heiborlem6  30552
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