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Theorem metdseq0 18915
Description: The distance from a point to a set is zero iff the point is in the closure set. (Contributed by Mario Carneiro, 14-Feb-2015.)
Hypotheses
Ref Expression
metdscn.f  |-  F  =  ( x  e.  X  |->  sup ( ran  (
y  e.  S  |->  ( x D y ) ) ,  RR* ,  `'  <  ) )
metdscn.j  |-  J  =  ( MetOpen `  D )
Assertion
Ref Expression
metdseq0  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  ( ( F `  A )  =  0  <->  A  e.  ( ( cls `  J
) `  S )
) )
Distinct variable groups:    x, y, A    x, D, y    y, J    x, S, y    x, X, y
Allowed substitution hints:    F( x, y)    J( x)

Proof of Theorem metdseq0
Dummy variables  r 
z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simpll1 997 . . . . . . 7  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z ) )  ->  D  e.  ( * Met `  X ) )
2 simprl 734 . . . . . . 7  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z ) )  -> 
z  e.  J )
3 simprr 735 . . . . . . 7  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z ) )  ->  A  e.  z )
4 metdscn.j . . . . . . . 8  |-  J  =  ( MetOpen `  D )
54mopni2 18554 . . . . . . 7  |-  ( ( D  e.  ( * Met `  X )  /\  z  e.  J  /\  A  e.  z
)  ->  E. r  e.  RR+  ( A (
ball `  D )
r )  C_  z
)
61, 2, 3, 5syl3anc 1185 . . . . . 6  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z ) )  ->  E. r  e.  RR+  ( A ( ball `  D
) r )  C_  z )
7 simprr 735 . . . . . . . 8  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
( A ( ball `  D ) r ) 
C_  z )
8 ssrin 3551 . . . . . . . 8  |-  ( ( A ( ball `  D
) r )  C_  z  ->  ( ( A ( ball `  D
) r )  i^i 
S )  C_  (
z  i^i  S )
)
97, 8syl 16 . . . . . . 7  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
( ( A (
ball `  D )
r )  i^i  S
)  C_  ( z  i^i  S ) )
10 rpgt0 10654 . . . . . . . . . 10  |-  ( r  e.  RR+  ->  0  < 
r )
11 0re 9122 . . . . . . . . . . 11  |-  0  e.  RR
12 rpre 10649 . . . . . . . . . . 11  |-  ( r  e.  RR+  ->  r  e.  RR )
13 ltnle 9186 . . . . . . . . . . 11  |-  ( ( 0  e.  RR  /\  r  e.  RR )  ->  ( 0  <  r  <->  -.  r  <_  0 ) )
1411, 12, 13sylancr 646 . . . . . . . . . 10  |-  ( r  e.  RR+  ->  ( 0  <  r  <->  -.  r  <_  0 ) )
1510, 14mpbid 203 . . . . . . . . 9  |-  ( r  e.  RR+  ->  -.  r  <_  0 )
1615ad2antrl 710 . . . . . . . 8  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  ->  -.  r  <_  0 )
17 simpllr 737 . . . . . . . . . . . 12  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
( F `  A
)  =  0 )
1817breq2d 4249 . . . . . . . . . . 11  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
( r  <_  ( F `  A )  <->  r  <_  0 ) )
191adantr 453 . . . . . . . . . . . 12  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  ->  D  e.  ( * Met `  X ) )
20 simpl2 962 . . . . . . . . . . . . 13  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  ->  S  C_  X
)
2120ad2antrr 708 . . . . . . . . . . . 12  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  ->  S  C_  X )
22 simpl3 963 . . . . . . . . . . . . 13  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  ->  A  e.  X )
2322ad2antrr 708 . . . . . . . . . . . 12  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  ->  A  e.  X )
24 rpxr 10650 . . . . . . . . . . . . 13  |-  ( r  e.  RR+  ->  r  e. 
RR* )
2524ad2antrl 710 . . . . . . . . . . . 12  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
r  e.  RR* )
26 metdscn.f . . . . . . . . . . . . 13  |-  F  =  ( x  e.  X  |->  sup ( ran  (
y  e.  S  |->  ( x D y ) ) ,  RR* ,  `'  <  ) )
2726metdsge 18910 . . . . . . . . . . . 12  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  r  e.  RR* )  ->  ( r  <_  ( F `  A
)  <->  ( S  i^i  ( A ( ball `  D
) r ) )  =  (/) ) )
2819, 21, 23, 25, 27syl31anc 1188 . . . . . . . . . . 11  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
( r  <_  ( F `  A )  <->  ( S  i^i  ( A ( ball `  D
) r ) )  =  (/) ) )
2918, 28bitr3d 248 . . . . . . . . . 10  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
( r  <_  0  <->  ( S  i^i  ( A ( ball `  D
) r ) )  =  (/) ) )
30 incom 3519 . . . . . . . . . . 11  |-  ( S  i^i  ( A (
ball `  D )
r ) )  =  ( ( A (
ball `  D )
r )  i^i  S
)
3130eqeq1i 2449 . . . . . . . . . 10  |-  ( ( S  i^i  ( A ( ball `  D
) r ) )  =  (/)  <->  ( ( A ( ball `  D
) r )  i^i 
S )  =  (/) )
3229, 31syl6bb 254 . . . . . . . . 9  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
( r  <_  0  <->  ( ( A ( ball `  D ) r )  i^i  S )  =  (/) ) )
3332necon3bbid 2641 . . . . . . . 8  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
( -.  r  <_ 
0  <->  ( ( A ( ball `  D
) r )  i^i 
S )  =/=  (/) ) )
3416, 33mpbid 203 . . . . . . 7  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
( ( A (
ball `  D )
r )  i^i  S
)  =/=  (/) )
35 ssn0 3645 . . . . . . 7  |-  ( ( ( ( A (
ball `  D )
r )  i^i  S
)  C_  ( z  i^i  S )  /\  (
( A ( ball `  D ) r )  i^i  S )  =/=  (/) )  ->  ( z  i^i  S )  =/=  (/) )
369, 34, 35syl2anc 644 . . . . . 6  |-  ( ( ( ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X )  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z
) )  /\  (
r  e.  RR+  /\  ( A ( ball `  D
) r )  C_  z ) )  -> 
( z  i^i  S
)  =/=  (/) )
376, 36rexlimddv 2840 . . . . 5  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  /\  ( z  e.  J  /\  A  e.  z ) )  -> 
( z  i^i  S
)  =/=  (/) )
3837expr 600 . . . 4  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  /\  z  e.  J )  ->  ( A  e.  z  ->  ( z  i^i  S )  =/=  (/) ) )
3938ralrimiva 2795 . . 3  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  ->  A. z  e.  J  ( A  e.  z  ->  ( z  i^i  S )  =/=  (/) ) )
404mopntopon 18500 . . . . . . 7  |-  ( D  e.  ( * Met `  X )  ->  J  e.  (TopOn `  X )
)
41403ad2ant1 979 . . . . . 6  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  J  e.  (TopOn `  X ) )
4241adantr 453 . . . . 5  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  ->  J  e.  (TopOn `  X ) )
43 topontop 17022 . . . . 5  |-  ( J  e.  (TopOn `  X
)  ->  J  e.  Top )
4442, 43syl 16 . . . 4  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  ->  J  e.  Top )
45 toponuni 17023 . . . . . 6  |-  ( J  e.  (TopOn `  X
)  ->  X  =  U. J )
4642, 45syl 16 . . . . 5  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  ->  X  =  U. J )
4720, 46sseqtrd 3370 . . . 4  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  ->  S  C_  U. J
)
4822, 46eleqtrd 2518 . . . 4  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  ->  A  e.  U. J )
49 eqid 2442 . . . . 5  |-  U. J  =  U. J
5049elcls 17168 . . . 4  |-  ( ( J  e.  Top  /\  S  C_  U. J  /\  A  e.  U. J )  ->  ( A  e.  ( ( cls `  J
) `  S )  <->  A. z  e.  J  ( A  e.  z  -> 
( z  i^i  S
)  =/=  (/) ) ) )
5144, 47, 48, 50syl3anc 1185 . . 3  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  ->  ( A  e.  ( ( cls `  J
) `  S )  <->  A. z  e.  J  ( A  e.  z  -> 
( z  i^i  S
)  =/=  (/) ) ) )
5239, 51mpbird 225 . 2  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  =  0 )  ->  A  e.  ( ( cls `  J
) `  S )
)
53 incom 3519 . . . . . . 7  |-  ( ( A ( ball `  D
) ( F `  A ) )  i^i 
S )  =  ( S  i^i  ( A ( ball `  D
) ( F `  A ) ) )
5426metdsf 18909 . . . . . . . . . . . 12  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X
)  ->  F : X
--> ( 0 [,]  +oo ) )
5554ffvelrnda 5899 . . . . . . . . . . 11  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X
)  /\  A  e.  X )  ->  ( F `  A )  e.  ( 0 [,]  +oo ) )
56553impa 1149 . . . . . . . . . 10  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  ( F `  A )  e.  ( 0 [,]  +oo )
)
57 elxrge0 11039 . . . . . . . . . . 11  |-  ( ( F `  A )  e.  ( 0 [,] 
+oo )  <->  ( ( F `  A )  e.  RR*  /\  0  <_ 
( F `  A
) ) )
5857simplbi 448 . . . . . . . . . 10  |-  ( ( F `  A )  e.  ( 0 [,] 
+oo )  ->  ( F `  A )  e.  RR* )
5956, 58syl 16 . . . . . . . . 9  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  ( F `  A )  e.  RR* )
60 xrleid 10774 . . . . . . . . 9  |-  ( ( F `  A )  e.  RR*  ->  ( F `
 A )  <_ 
( F `  A
) )
6159, 60syl 16 . . . . . . . 8  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  ( F `  A )  <_  ( F `  A )
)
6226metdsge 18910 . . . . . . . . 9  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  ( F `  A )  e.  RR* )  ->  ( ( F `
 A )  <_ 
( F `  A
)  <->  ( S  i^i  ( A ( ball `  D
) ( F `  A ) ) )  =  (/) ) )
6359, 62mpdan 651 . . . . . . . 8  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  ( ( F `  A )  <_  ( F `  A
)  <->  ( S  i^i  ( A ( ball `  D
) ( F `  A ) ) )  =  (/) ) )
6461, 63mpbid 203 . . . . . . 7  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  ( S  i^i  ( A ( ball `  D ) ( F `
 A ) ) )  =  (/) )
6553, 64syl5eq 2486 . . . . . 6  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  ( ( A ( ball `  D
) ( F `  A ) )  i^i 
S )  =  (/) )
6665adantr 453 . . . . 5  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  ->  ( ( A ( ball `  D
) ( F `  A ) )  i^i 
S )  =  (/) )
6741ad2antrr 708 . . . . . . . . 9  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  J  e.  (TopOn `  X ) )
6867, 43syl 16 . . . . . . . 8  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  J  e.  Top )
69 simpll2 998 . . . . . . . . 9  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  S  C_  X
)
7067, 45syl 16 . . . . . . . . 9  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  X  =  U. J )
7169, 70sseqtrd 3370 . . . . . . . 8  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  S  C_  U. J
)
72 simplr 733 . . . . . . . 8  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  A  e.  ( ( cls `  J
) `  S )
)
73 simpll1 997 . . . . . . . . 9  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  D  e.  ( * Met `  X
) )
74 simpll3 999 . . . . . . . . 9  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  A  e.  X )
7559ad2antrr 708 . . . . . . . . 9  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  ( F `  A )  e.  RR* )
764blopn 18561 . . . . . . . . 9  |-  ( ( D  e.  ( * Met `  X )  /\  A  e.  X  /\  ( F `  A
)  e.  RR* )  ->  ( A ( ball `  D ) ( F `
 A ) )  e.  J )
7773, 74, 75, 76syl3anc 1185 . . . . . . . 8  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  ( A
( ball `  D )
( F `  A
) )  e.  J
)
78 simpr 449 . . . . . . . . 9  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  0  <  ( F `  A ) )
79 xblcntr 18472 . . . . . . . . 9  |-  ( ( D  e.  ( * Met `  X )  /\  A  e.  X  /\  ( ( F `  A )  e.  RR*  /\  0  <  ( F `
 A ) ) )  ->  A  e.  ( A ( ball `  D
) ( F `  A ) ) )
8073, 74, 75, 78, 79syl112anc 1189 . . . . . . . 8  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  A  e.  ( A ( ball `  D
) ( F `  A ) ) )
8149clsndisj 17170 . . . . . . . 8  |-  ( ( ( J  e.  Top  /\  S  C_  U. J  /\  A  e.  ( ( cls `  J ) `  S ) )  /\  ( ( A (
ball `  D )
( F `  A
) )  e.  J  /\  A  e.  ( A ( ball `  D
) ( F `  A ) ) ) )  ->  ( ( A ( ball `  D
) ( F `  A ) )  i^i 
S )  =/=  (/) )
8268, 71, 72, 77, 80, 81syl32anc 1193 . . . . . . 7  |-  ( ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  /\  0  <  ( F `  A ) )  ->  ( ( A ( ball `  D
) ( F `  A ) )  i^i 
S )  =/=  (/) )
8382ex 425 . . . . . 6  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  ->  ( 0  <  ( F `  A )  ->  (
( A ( ball `  D ) ( F `
 A ) )  i^i  S )  =/=  (/) ) )
8483necon2bd 2659 . . . . 5  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  ->  ( (
( A ( ball `  D ) ( F `
 A ) )  i^i  S )  =  (/)  ->  -.  0  <  ( F `  A ) ) )
8566, 84mpd 15 . . . 4  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  ->  -.  0  <  ( F `  A
) )
8657simprbi 452 . . . . . . . 8  |-  ( ( F `  A )  e.  ( 0 [,] 
+oo )  ->  0  <_  ( F `  A
) )
8756, 86syl 16 . . . . . . 7  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  0  <_  ( F `  A ) )
88 0xr 9162 . . . . . . . 8  |-  0  e.  RR*
89 xrleloe 10768 . . . . . . . 8  |-  ( ( 0  e.  RR*  /\  ( F `  A )  e.  RR* )  ->  (
0  <_  ( F `  A )  <->  ( 0  <  ( F `  A )  \/  0  =  ( F `  A ) ) ) )
9088, 59, 89sylancr 646 . . . . . . 7  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  ( 0  <_  ( F `  A )  <->  ( 0  <  ( F `  A )  \/  0  =  ( F `  A ) ) ) )
9187, 90mpbid 203 . . . . . 6  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  ( 0  <  ( F `  A )  \/  0  =  ( F `  A ) ) )
9291adantr 453 . . . . 5  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  ->  ( 0  <  ( F `  A )  \/  0  =  ( F `  A ) ) )
9392ord 368 . . . 4  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  ->  ( -.  0  <  ( F `  A )  ->  0  =  ( F `  A ) ) )
9485, 93mpd 15 . . 3  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  ->  0  =  ( F `  A ) )
9594eqcomd 2447 . 2  |-  ( ( ( D  e.  ( * Met `  X
)  /\  S  C_  X  /\  A  e.  X
)  /\  A  e.  ( ( cls `  J
) `  S )
)  ->  ( F `  A )  =  0 )
9652, 95impbida 807 1  |-  ( ( D  e.  ( * Met `  X )  /\  S  C_  X  /\  A  e.  X
)  ->  ( ( F `  A )  =  0  <->  A  e.  ( ( cls `  J
) `  S )
) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    <-> wb 178    \/ wo 359    /\ wa 360    /\ w3a 937    = wceq 1653    e. wcel 1727    =/= wne 2605   A.wral 2711   E.wrex 2712    i^i cin 3305    C_ wss 3306   (/)c0 3613   U.cuni 4039   class class class wbr 4237    e. cmpt 4291   `'ccnv 4906   ran crn 4908   ` cfv 5483  (class class class)co 6110   supcsup 7474   RRcr 9020   0cc0 9021    +oocpnf 9148   RR*cxr 9150    < clt 9151    <_ cle 9152   RR+crp 10643   [,]cicc 10950   * Metcxmt 16717   ballcbl 16719   MetOpencmopn 16722   Topctop 16989  TopOnctopon 16990   clsccl 17113
This theorem is referenced by:  metnrmlem1a  18919  lebnumlem1  19017
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1556  ax-5 1567  ax-17 1627  ax-9 1668  ax-8 1689  ax-13 1729  ax-14 1731  ax-6 1746  ax-7 1751  ax-11 1763  ax-12 1953  ax-ext 2423  ax-rep 4345  ax-sep 4355  ax-nul 4363  ax-pow 4406  ax-pr 4432  ax-un 4730  ax-cnex 9077  ax-resscn 9078  ax-1cn 9079  ax-icn 9080  ax-addcl 9081  ax-addrcl 9082  ax-mulcl 9083  ax-mulrcl 9084  ax-mulcom 9085  ax-addass 9086  ax-mulass 9087  ax-distr 9088  ax-i2m1 9089  ax-1ne0 9090  ax-1rid 9091  ax-rnegex 9092  ax-rrecex 9093  ax-cnre 9094  ax-pre-lttri 9095  ax-pre-lttrn 9096  ax-pre-ltadd 9097  ax-pre-mulgt0 9098  ax-pre-sup 9099
This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3or 938  df-3an 939  df-tru 1329  df-ex 1552  df-nf 1555  df-sb 1660  df-eu 2291  df-mo 2292  df-clab 2429  df-cleq 2435  df-clel 2438  df-nfc 2567  df-ne 2607  df-nel 2608  df-ral 2716  df-rex 2717  df-reu 2718  df-rmo 2719  df-rab 2720  df-v 2964  df-sbc 3168  df-csb 3268  df-dif 3309  df-un 3311  df-in 3313  df-ss 3320  df-pss 3322  df-nul 3614  df-if 3764  df-pw 3825  df-sn 3844  df-pr 3845  df-tp 3846  df-op 3847  df-uni 4040  df-int 4075  df-iun 4119  df-iin 4120  df-br 4238  df-opab 4292  df-mpt 4293  df-tr 4328  df-eprel 4523  df-id 4527  df-po 4532  df-so 4533  df-fr 4570  df-we 4572  df-ord 4613  df-on 4614  df-lim 4615  df-suc 4616  df-om 4875  df-xp 4913  df-rel 4914  df-cnv 4915  df-co 4916  df-dm 4917  df-rn 4918  df-res 4919  df-ima 4920  df-iota 5447  df-fun 5485  df-fn 5486  df-f 5487  df-f1 5488  df-fo 5489  df-f1o 5490  df-fv 5491  df-ov 6113  df-oprab 6114  df-mpt2 6115  df-1st 6378  df-2nd 6379  df-riota 6578  df-recs 6662  df-rdg 6697  df-er 6934  df-map 7049  df-en 7139  df-dom 7140  df-sdom 7141  df-sup 7475  df-pnf 9153  df-mnf 9154  df-xr 9155  df-ltxr 9156  df-le 9157  df-sub 9324  df-neg 9325  df-div 9709  df-nn 10032  df-2 10089  df-n0 10253  df-z 10314  df-uz 10520  df-q 10606  df-rp 10644  df-xneg 10741  df-xadd 10742  df-xmul 10743  df-icc 10954  df-topgen 13698  df-psmet 16725  df-xmet 16726  df-bl 16728  df-mopn 16729  df-top 16994  df-bases 16996  df-topon 16997  df-cld 17114  df-ntr 17115  df-cls 17116
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