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Theorem nrginvrcn 18218
Description: The ring inverse function is continuous in a normed ring. (Note that this is true even in rings which are not division rings.) (Contributed by Mario Carneiro, 6-Oct-2015.)
Hypotheses
Ref Expression
nrginvrcn.x  |-  X  =  ( Base `  R
)
nrginvrcn.u  |-  U  =  (Unit `  R )
nrginvrcn.i  |-  I  =  ( invr `  R
)
nrginvrcn.j  |-  J  =  ( TopOpen `  R )
Assertion
Ref Expression
nrginvrcn  |-  ( R  e. NrmRing  ->  I  e.  ( ( Jt  U )  Cn  ( Jt  U ) ) )

Proof of Theorem nrginvrcn
Dummy variables  s 
r  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 nrgrng 18190 . . . 4  |-  ( R  e. NrmRing  ->  R  e.  Ring )
2 nrginvrcn.u . . . . 5  |-  U  =  (Unit `  R )
3 eqid 2296 . . . . 5  |-  ( (mulGrp `  R )s  U )  =  ( (mulGrp `  R )s  U
)
42, 3unitgrp 15465 . . . 4  |-  ( R  e.  Ring  ->  ( (mulGrp `  R )s  U )  e.  Grp )
52, 3unitgrpbas 15464 . . . . 5  |-  U  =  ( Base `  (
(mulGrp `  R )s  U
) )
6 nrginvrcn.i . . . . . 6  |-  I  =  ( invr `  R
)
72, 3, 6invrfval 15471 . . . . 5  |-  I  =  ( inv g `  ( (mulGrp `  R )s  U
) )
85, 7grpinvf 14542 . . . 4  |-  ( ( (mulGrp `  R )s  U
)  e.  Grp  ->  I : U --> U )
91, 4, 83syl 18 . . 3  |-  ( R  e. NrmRing  ->  I : U --> U )
10 1rp 10374 . . . . . . . 8  |-  1  e.  RR+
11 ne0i 3474 . . . . . . . 8  |-  ( 1  e.  RR+  ->  RR+  =/=  (/) )
1210, 11ax-mp 8 . . . . . . 7  |-  RR+  =/=  (/)
131ad2antrr 706 . . . . . . . . . . . . . 14  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  R  e.  Ring )
14 nrginvrcn.x . . . . . . . . . . . . . . . 16  |-  X  =  ( Base `  R
)
1514, 2unitss 15458 . . . . . . . . . . . . . . 15  |-  U  C_  X
16 simplrl 736 . . . . . . . . . . . . . . 15  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  x  e.  U )
1715, 16sseldi 3191 . . . . . . . . . . . . . 14  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  x  e.  X )
18 simpr 447 . . . . . . . . . . . . . . 15  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  y  e.  U )
1915, 18sseldi 3191 . . . . . . . . . . . . . 14  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  y  e.  X )
20 eqid 2296 . . . . . . . . . . . . . . 15  |-  ( 1r
`  R )  =  ( 1r `  R
)
21 eqid 2296 . . . . . . . . . . . . . . 15  |-  ( 0g
`  R )  =  ( 0g `  R
)
2214, 20, 21rng1eq0 15395 . . . . . . . . . . . . . 14  |-  ( ( R  e.  Ring  /\  x  e.  X  /\  y  e.  X )  ->  (
( 1r `  R
)  =  ( 0g
`  R )  ->  x  =  y )
)
2313, 17, 19, 22syl3anc 1182 . . . . . . . . . . . . 13  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( ( 1r `  R )  =  ( 0g `  R
)  ->  x  =  y ) )
24 eqid 2296 . . . . . . . . . . . . . . . 16  |-  ( I `
 y )  =  ( I `  y
)
25 nrgngp 18189 . . . . . . . . . . . . . . . . . . 19  |-  ( R  e. NrmRing  ->  R  e. NrmGrp )
26 ngpms 18138 . . . . . . . . . . . . . . . . . . 19  |-  ( R  e. NrmGrp  ->  R  e.  MetSp )
27 msxms 18016 . . . . . . . . . . . . . . . . . . 19  |-  ( R  e.  MetSp  ->  R  e.  *
MetSp )
2825, 26, 273syl 18 . . . . . . . . . . . . . . . . . 18  |-  ( R  e. NrmRing  ->  R  e.  * MetSp )
2928ad2antrr 706 . . . . . . . . . . . . . . . . 17  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  R  e.  *
MetSp )
309adantr 451 . . . . . . . . . . . . . . . . . . 19  |-  ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  ->  I : U --> U )
31 ffvelrn 5679 . . . . . . . . . . . . . . . . . . 19  |-  ( ( I : U --> U  /\  y  e.  U )  ->  ( I `  y
)  e.  U )
3230, 31sylan 457 . . . . . . . . . . . . . . . . . 18  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( I `  y )  e.  U
)
3315, 32sseldi 3191 . . . . . . . . . . . . . . . . 17  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( I `  y )  e.  X
)
34 eqid 2296 . . . . . . . . . . . . . . . . . 18  |-  ( dist `  R )  =  (
dist `  R )
3514, 34xmseq0 18026 . . . . . . . . . . . . . . . . 17  |-  ( ( R  e.  * MetSp  /\  ( I `  y
)  e.  X  /\  ( I `  y
)  e.  X )  ->  ( ( ( I `  y ) ( dist `  R
) ( I `  y ) )  =  0  <->  ( I `  y )  =  ( I `  y ) ) )
3629, 33, 33, 35syl3anc 1182 . . . . . . . . . . . . . . . 16  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( (
( I `  y
) ( dist `  R
) ( I `  y ) )  =  0  <->  ( I `  y )  =  ( I `  y ) ) )
3724, 36mpbiri 224 . . . . . . . . . . . . . . 15  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( (
I `  y )
( dist `  R )
( I `  y
) )  =  0 )
38 simplrr 737 . . . . . . . . . . . . . . . 16  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  r  e.  RR+ )
3938rpgt0d 10409 . . . . . . . . . . . . . . 15  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  0  <  r )
4037, 39eqbrtrd 4059 . . . . . . . . . . . . . 14  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( (
I `  y )
( dist `  R )
( I `  y
) )  <  r
)
41 fveq2 5541 . . . . . . . . . . . . . . . 16  |-  ( x  =  y  ->  (
I `  x )  =  ( I `  y ) )
4241oveq1d 5889 . . . . . . . . . . . . . . 15  |-  ( x  =  y  ->  (
( I `  x
) ( dist `  R
) ( I `  y ) )  =  ( ( I `  y ) ( dist `  R ) ( I `
 y ) ) )
4342breq1d 4049 . . . . . . . . . . . . . 14  |-  ( x  =  y  ->  (
( ( I `  x ) ( dist `  R ) ( I `
 y ) )  <  r  <->  ( (
I `  y )
( dist `  R )
( I `  y
) )  <  r
) )
4440, 43syl5ibrcom 213 . . . . . . . . . . . . 13  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( x  =  y  ->  ( ( I `  x ) ( dist `  R
) ( I `  y ) )  < 
r ) )
4523, 44syld 40 . . . . . . . . . . . 12  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( ( 1r `  R )  =  ( 0g `  R
)  ->  ( (
I `  x )
( dist `  R )
( I `  y
) )  <  r
) )
4645imp 418 . . . . . . . . . . 11  |-  ( ( ( ( R  e. NrmRing  /\  ( x  e.  U  /\  r  e.  RR+ )
)  /\  y  e.  U )  /\  ( 1r `  R )  =  ( 0g `  R
) )  ->  (
( I `  x
) ( dist `  R
) ( I `  y ) )  < 
r )
4746an32s 779 . . . . . . . . . 10  |-  ( ( ( ( R  e. NrmRing  /\  ( x  e.  U  /\  r  e.  RR+ )
)  /\  ( 1r `  R )  =  ( 0g `  R ) )  /\  y  e.  U )  ->  (
( I `  x
) ( dist `  R
) ( I `  y ) )  < 
r )
4847a1d 22 . . . . . . . . 9  |-  ( ( ( ( R  e. NrmRing  /\  ( x  e.  U  /\  r  e.  RR+ )
)  /\  ( 1r `  R )  =  ( 0g `  R ) )  /\  y  e.  U )  ->  (
( x ( dist `  R ) y )  <  s  ->  (
( I `  x
) ( dist `  R
) ( I `  y ) )  < 
r ) )
4948ralrimiva 2639 . . . . . . . 8  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =  ( 0g `  R ) )  ->  A. y  e.  U  ( (
x ( dist `  R
) y )  < 
s  ->  ( (
I `  x )
( dist `  R )
( I `  y
) )  <  r
) )
5049ralrimivw 2640 . . . . . . 7  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =  ( 0g `  R ) )  ->  A. s  e.  RR+  A. y  e.  U  ( ( x ( dist `  R
) y )  < 
s  ->  ( (
I `  x )
( dist `  R )
( I `  y
) )  <  r
) )
51 r19.2z 3556 . . . . . . 7  |-  ( (
RR+  =/=  (/)  /\  A. s  e.  RR+  A. y  e.  U  ( (
x ( dist `  R
) y )  < 
s  ->  ( (
I `  x )
( dist `  R )
( I `  y
) )  <  r
) )  ->  E. s  e.  RR+  A. y  e.  U  ( ( x ( dist `  R
) y )  < 
s  ->  ( (
I `  x )
( dist `  R )
( I `  y
) )  <  r
) )
5212, 50, 51sylancr 644 . . . . . 6  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =  ( 0g `  R ) )  ->  E. s  e.  RR+  A. y  e.  U  ( ( x ( dist `  R
) y )  < 
s  ->  ( (
I `  x )
( dist `  R )
( I `  y
) )  <  r
) )
53 eqid 2296 . . . . . . 7  |-  ( norm `  R )  =  (
norm `  R )
54 simpll 730 . . . . . . 7  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  R  e. NrmRing )
551ad2antrr 706 . . . . . . . 8  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  R  e.  Ring )
56 simpr 447 . . . . . . . 8  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  ( 1r `  R )  =/=  ( 0g `  R ) )
5720, 21isnzr 16027 . . . . . . . 8  |-  ( R  e. NzRing 
<->  ( R  e.  Ring  /\  ( 1r `  R
)  =/=  ( 0g
`  R ) ) )
5855, 56, 57sylanbrc 645 . . . . . . 7  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  R  e. NzRing )
59 simplrl 736 . . . . . . 7  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  x  e.  U
)
60 simplrr 737 . . . . . . 7  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  r  e.  RR+ )
61 eqid 2296 . . . . . . 7  |-  ( if ( 1  <_  (
( ( norm `  R
) `  x )  x.  r ) ,  1 ,  ( ( (
norm `  R ) `  x )  x.  r
) )  x.  (
( ( norm `  R
) `  x )  /  2 ) )  =  ( if ( 1  <_  ( (
( norm `  R ) `  x )  x.  r
) ,  1 ,  ( ( ( norm `  R ) `  x
)  x.  r ) )  x.  ( ( ( norm `  R
) `  x )  /  2 ) )
6214, 2, 6, 53, 34, 54, 58, 59, 60, 61nrginvrcnlem 18217 . . . . . 6  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  E. s  e.  RR+  A. y  e.  U  ( ( x ( dist `  R ) y )  <  s  ->  (
( I `  x
) ( dist `  R
) ( I `  y ) )  < 
r ) )
6352, 62pm2.61dane 2537 . . . . 5  |-  ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  ->  E. s  e.  RR+  A. y  e.  U  ( ( x ( dist `  R ) y )  <  s  ->  (
( I `  x
) ( dist `  R
) ( I `  y ) )  < 
r ) )
6416, 18ovresd 6004 . . . . . . . . 9  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( x
( ( dist `  R
)  |`  ( U  X.  U ) ) y )  =  ( x ( dist `  R
) y ) )
6564breq1d 4049 . . . . . . . 8  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( (
x ( ( dist `  R )  |`  ( U  X.  U ) ) y )  <  s  <->  ( x ( dist `  R
) y )  < 
s ) )
66 simpl 443 . . . . . . . . . . . 12  |-  ( ( x  e.  U  /\  r  e.  RR+ )  ->  x  e.  U )
67 ffvelrn 5679 . . . . . . . . . . . 12  |-  ( ( I : U --> U  /\  x  e.  U )  ->  ( I `  x
)  e.  U )
689, 66, 67syl2an 463 . . . . . . . . . . 11  |-  ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  ->  ( I `  x )  e.  U
)
6968adantr 451 . . . . . . . . . 10  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( I `  x )  e.  U
)
7069, 32ovresd 6004 . . . . . . . . 9  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( (
I `  x )
( ( dist `  R
)  |`  ( U  X.  U ) ) ( I `  y ) )  =  ( ( I `  x ) ( dist `  R
) ( I `  y ) ) )
7170breq1d 4049 . . . . . . . 8  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( (
( I `  x
) ( ( dist `  R )  |`  ( U  X.  U ) ) ( I `  y
) )  <  r  <->  ( ( I `  x
) ( dist `  R
) ( I `  y ) )  < 
r ) )
7265, 71imbi12d 311 . . . . . . 7  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( (
( x ( (
dist `  R )  |`  ( U  X.  U
) ) y )  <  s  ->  (
( I `  x
) ( ( dist `  R )  |`  ( U  X.  U ) ) ( I `  y
) )  <  r
)  <->  ( ( x ( dist `  R
) y )  < 
s  ->  ( (
I `  x )
( dist `  R )
( I `  y
) )  <  r
) ) )
7372ralbidva 2572 . . . . . 6  |-  ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  ->  ( A. y  e.  U  ( (
x ( ( dist `  R )  |`  ( U  X.  U ) ) y )  <  s  ->  ( ( I `  x ) ( (
dist `  R )  |`  ( U  X.  U
) ) ( I `
 y ) )  <  r )  <->  A. y  e.  U  ( (
x ( dist `  R
) y )  < 
s  ->  ( (
I `  x )
( dist `  R )
( I `  y
) )  <  r
) ) )
7473rexbidv 2577 . . . . 5  |-  ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  ->  ( E. s  e.  RR+  A. y  e.  U  ( ( x ( ( dist `  R
)  |`  ( U  X.  U ) ) y )  <  s  -> 
( ( I `  x ) ( (
dist `  R )  |`  ( U  X.  U
) ) ( I `
 y ) )  <  r )  <->  E. s  e.  RR+  A. y  e.  U  ( ( x ( dist `  R
) y )  < 
s  ->  ( (
I `  x )
( dist `  R )
( I `  y
) )  <  r
) ) )
7563, 74mpbird 223 . . . 4  |-  ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  ->  E. s  e.  RR+  A. y  e.  U  ( ( x ( (
dist `  R )  |`  ( U  X.  U
) ) y )  <  s  ->  (
( I `  x
) ( ( dist `  R )  |`  ( U  X.  U ) ) ( I `  y
) )  <  r
) )
7675ralrimivva 2648 . . 3  |-  ( R  e. NrmRing  ->  A. x  e.  U  A. r  e.  RR+  E. s  e.  RR+  A. y  e.  U  ( ( x ( ( dist `  R
)  |`  ( U  X.  U ) ) y )  <  s  -> 
( ( I `  x ) ( (
dist `  R )  |`  ( U  X.  U
) ) ( I `
 y ) )  <  r ) )
77 xpss12 4808 . . . . . . 7  |-  ( ( U  C_  X  /\  U  C_  X )  -> 
( U  X.  U
)  C_  ( X  X.  X ) )
7815, 15, 77mp2an 653 . . . . . 6  |-  ( U  X.  U )  C_  ( X  X.  X
)
79 resabs1 5000 . . . . . 6  |-  ( ( U  X.  U ) 
C_  ( X  X.  X )  ->  (
( ( dist `  R
)  |`  ( X  X.  X ) )  |`  ( U  X.  U
) )  =  ( ( dist `  R
)  |`  ( U  X.  U ) ) )
8078, 79ax-mp 8 . . . . 5  |-  ( ( ( dist `  R
)  |`  ( X  X.  X ) )  |`  ( U  X.  U
) )  =  ( ( dist `  R
)  |`  ( U  X.  U ) )
8125, 26syl 15 . . . . . . 7  |-  ( R  e. NrmRing  ->  R  e.  MetSp )
82 eqid 2296 . . . . . . . 8  |-  ( (
dist `  R )  |`  ( X  X.  X
) )  =  ( ( dist `  R
)  |`  ( X  X.  X ) )
8314, 82xmsxmet 18018 . . . . . . 7  |-  ( R  e.  * MetSp  ->  (
( dist `  R )  |`  ( X  X.  X
) )  e.  ( * Met `  X
) )
8481, 27, 833syl 18 . . . . . 6  |-  ( R  e. NrmRing  ->  ( ( dist `  R )  |`  ( X  X.  X ) )  e.  ( * Met `  X ) )
85 xmetres2 17941 . . . . . 6  |-  ( ( ( ( dist `  R
)  |`  ( X  X.  X ) )  e.  ( * Met `  X
)  /\  U  C_  X
)  ->  ( (
( dist `  R )  |`  ( X  X.  X
) )  |`  ( U  X.  U ) )  e.  ( * Met `  U ) )
8684, 15, 85sylancl 643 . . . . 5  |-  ( R  e. NrmRing  ->  ( ( (
dist `  R )  |`  ( X  X.  X
) )  |`  ( U  X.  U ) )  e.  ( * Met `  U ) )
8780, 86syl5eqelr 2381 . . . 4  |-  ( R  e. NrmRing  ->  ( ( dist `  R )  |`  ( U  X.  U ) )  e.  ( * Met `  U ) )
88 eqid 2296 . . . . 5  |-  ( MetOpen `  ( ( dist `  R
)  |`  ( U  X.  U ) ) )  =  ( MetOpen `  (
( dist `  R )  |`  ( U  X.  U
) ) )
8988, 88metcn 18105 . . . 4  |-  ( ( ( ( dist `  R
)  |`  ( U  X.  U ) )  e.  ( * Met `  U
)  /\  ( ( dist `  R )  |`  ( U  X.  U
) )  e.  ( * Met `  U
) )  ->  (
I  e.  ( (
MetOpen `  ( ( dist `  R )  |`  ( U  X.  U ) ) )  Cn  ( MetOpen `  ( ( dist `  R
)  |`  ( U  X.  U ) ) ) )  <->  ( I : U --> U  /\  A. x  e.  U  A. r  e.  RR+  E. s  e.  RR+  A. y  e.  U  ( ( x ( ( dist `  R
)  |`  ( U  X.  U ) ) y )  <  s  -> 
( ( I `  x ) ( (
dist `  R )  |`  ( U  X.  U
) ) ( I `
 y ) )  <  r ) ) ) )
9087, 87, 89syl2anc 642 . . 3  |-  ( R  e. NrmRing  ->  ( I  e.  ( ( MetOpen `  (
( dist `  R )  |`  ( U  X.  U
) ) )  Cn  ( MetOpen `  ( ( dist `  R )  |`  ( U  X.  U
) ) ) )  <-> 
( I : U --> U  /\  A. x  e.  U  A. r  e.  RR+  E. s  e.  RR+  A. y  e.  U  ( ( x ( (
dist `  R )  |`  ( U  X.  U
) ) y )  <  s  ->  (
( I `  x
) ( ( dist `  R )  |`  ( U  X.  U ) ) ( I `  y
) )  <  r
) ) ) )
919, 76, 90mpbir2and 888 . 2  |-  ( R  e. NrmRing  ->  I  e.  ( ( MetOpen `  ( ( dist `  R )  |`  ( U  X.  U
) ) )  Cn  ( MetOpen `  ( ( dist `  R )  |`  ( U  X.  U
) ) ) ) )
92 nrginvrcn.j . . . . . . 7  |-  J  =  ( TopOpen `  R )
9392, 14, 82mstopn 18014 . . . . . 6  |-  ( R  e.  MetSp  ->  J  =  ( MetOpen `  ( ( dist `  R )  |`  ( X  X.  X
) ) ) )
9425, 26, 933syl 18 . . . . 5  |-  ( R  e. NrmRing  ->  J  =  (
MetOpen `  ( ( dist `  R )  |`  ( X  X.  X ) ) ) )
9594oveq1d 5889 . . . 4  |-  ( R  e. NrmRing  ->  ( Jt  U )  =  ( ( MetOpen `  ( ( dist `  R
)  |`  ( X  X.  X ) ) )t  U ) )
9680eqcomi 2300 . . . . . 6  |-  ( (
dist `  R )  |`  ( U  X.  U
) )  =  ( ( ( dist `  R
)  |`  ( X  X.  X ) )  |`  ( U  X.  U
) )
97 eqid 2296 . . . . . 6  |-  ( MetOpen `  ( ( dist `  R
)  |`  ( X  X.  X ) ) )  =  ( MetOpen `  (
( dist `  R )  |`  ( X  X.  X
) ) )
9896, 97, 88metrest 18086 . . . . 5  |-  ( ( ( ( dist `  R
)  |`  ( X  X.  X ) )  e.  ( * Met `  X
)  /\  U  C_  X
)  ->  ( ( MetOpen
`  ( ( dist `  R )  |`  ( X  X.  X ) ) )t  U )  =  (
MetOpen `  ( ( dist `  R )  |`  ( U  X.  U ) ) ) )
9984, 15, 98sylancl 643 . . . 4  |-  ( R  e. NrmRing  ->  ( ( MetOpen `  ( ( dist `  R
)  |`  ( X  X.  X ) ) )t  U )  =  ( MetOpen `  ( ( dist `  R
)  |`  ( U  X.  U ) ) ) )
10095, 99eqtrd 2328 . . 3  |-  ( R  e. NrmRing  ->  ( Jt  U )  =  ( MetOpen `  (
( dist `  R )  |`  ( U  X.  U
) ) ) )
101100, 100oveq12d 5892 . 2  |-  ( R  e. NrmRing  ->  ( ( Jt  U )  Cn  ( Jt  U ) )  =  ( ( MetOpen `  ( ( dist `  R )  |`  ( U  X.  U
) ) )  Cn  ( MetOpen `  ( ( dist `  R )  |`  ( U  X.  U
) ) ) ) )
10291, 101eleqtrrd 2373 1  |-  ( R  e. NrmRing  ->  I  e.  ( ( Jt  U )  Cn  ( Jt  U ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 176    /\ wa 358    = wceq 1632    e. wcel 1696    =/= wne 2459   A.wral 2556   E.wrex 2557    C_ wss 3165   (/)c0 3468   ifcif 3578   class class class wbr 4039    X. cxp 4703    |` cres 4707   -->wf 5267   ` cfv 5271  (class class class)co 5874   0cc0 8753   1c1 8754    x. cmul 8758    < clt 8883    <_ cle 8884    / cdiv 9439   2c2 9811   RR+crp 10370   Basecbs 13164   ↾s cress 13165   distcds 13233   ↾t crest 13341   TopOpenctopn 13342   0gc0g 13416   Grpcgrp 14378  mulGrpcmgp 15341   Ringcrg 15353   1rcur 15355  Unitcui 15437   invrcinvr 15469  NzRingcnzr 16025   * Metcxmt 16385   MetOpencmopn 16388    Cn ccn 16970   *
MetSpcxme 17898   MetSpcmt 17899   normcnm 18115  NrmGrpcngp 18116  NrmRingcnrg 18118
This theorem is referenced by:  nrgtdrg  18219
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1536  ax-5 1547  ax-17 1606  ax-9 1644  ax-8 1661  ax-13 1698  ax-14 1700  ax-6 1715  ax-7 1720  ax-11 1727  ax-12 1878  ax-ext 2277  ax-rep 4147  ax-sep 4157  ax-nul 4165  ax-pow 4204  ax-pr 4230  ax-un 4528  ax-cnex 8809  ax-resscn 8810  ax-1cn 8811  ax-icn 8812  ax-addcl 8813  ax-addrcl 8814  ax-mulcl 8815  ax-mulrcl 8816  ax-mulcom 8817  ax-addass 8818  ax-mulass 8819  ax-distr 8820  ax-i2m1 8821  ax-1ne0 8822  ax-1rid 8823  ax-rnegex 8824  ax-rrecex 8825  ax-cnre 8826  ax-pre-lttri 8827  ax-pre-lttrn 8828  ax-pre-ltadd 8829  ax-pre-mulgt0 8830  ax-pre-sup 8831
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-tru 1310  df-ex 1532  df-nf 1535  df-sb 1639  df-eu 2160  df-mo 2161  df-clab 2283  df-cleq 2289  df-clel 2292  df-nfc 2421  df-ne 2461  df-nel 2462  df-ral 2561  df-rex 2562  df-reu 2563  df-rmo 2564  df-rab 2565  df-v 2803  df-sbc 3005  df-csb 3095  df-dif 3168  df-un 3170  df-in 3172  df-ss 3179  df-pss 3181  df-nul 3469  df-if 3579  df-pw 3640  df-sn 3659  df-pr 3660  df-tp 3661  df-op 3662  df-uni 3844  df-int 3879  df-iun 3923  df-br 4040  df-opab 4094  df-mpt 4095  df-tr 4130  df-eprel 4321  df-id 4325  df-po 4330  df-so 4331  df-fr 4368  df-we 4370  df-ord 4411  df-on 4412  df-lim 4413  df-suc 4414  df-om 4673  df-xp 4711  df-rel 4712  df-cnv 4713  df-co 4714  df-dm 4715  df-rn 4716  df-res 4717  df-ima 4718  df-iota 5235  df-fun 5273  df-fn 5274  df-f 5275  df-f1 5276  df-fo 5277  df-f1o 5278  df-fv 5279  df-ov 5877  df-oprab 5878  df-mpt2 5879  df-1st 6138  df-2nd 6139  df-tpos 6250  df-riota 6320  df-recs 6404  df-rdg 6439  df-1o 6495  df-oadd 6499  df-er 6676  df-map 6790  df-en 6880  df-dom 6881  df-sdom 6882  df-fin 6883  df-sup 7210  df-pnf 8885  df-mnf 8886  df-xr 8887  df-ltxr 8888  df-le 8889  df-sub 9055  df-neg 9056  df-div 9440  df-nn 9763  df-2 9820  df-3 9821  df-4 9822  df-5 9823  df-6 9824  df-7 9825  df-8 9826  df-9 9827  df-10 9828  df-n0 9982  df-z 10041  df-dec 10141  df-uz 10247  df-q 10333  df-rp 10371  df-xneg 10468  df-xadd 10469  df-xmul 10470  df-fz 10799  df-seq 11063  df-exp 11121  df-cj 11600  df-re 11601  df-im 11602  df-sqr 11736  df-abs 11737  df-struct 13166  df-ndx 13167  df-slot 13168  df-base 13169  df-sets 13170  df-ress 13171  df-plusg 13237  df-mulr 13238  df-tset 13243  df-ple 13244  df-ds 13246  df-rest 13343  df-topgen 13360  df-xrs 13419  df-0g 13420  df-mnd 14383  df-grp 14505  df-minusg 14506  df-sbg 14507  df-mgp 15342  df-rng 15356  df-ur 15358  df-oppr 15421  df-dvdsr 15439  df-unit 15440  df-invr 15470  df-abv 15598  df-nzr 16026  df-xmet 16389  df-met 16390  df-bl 16391  df-mopn 16392  df-top 16652  df-bases 16654  df-topon 16655  df-topsp 16656  df-cn 16973  df-cnp 16974  df-xms 17901  df-ms 17902  df-nm 18121  df-ngp 18122  df-nrg 18124
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