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Theorem nrginvrcn 18680
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 18652 . . . 4  |-  ( R  e. NrmRing  ->  R  e.  Ring )
2 nrginvrcn.u . . . . 5  |-  U  =  (Unit `  R )
3 eqid 2404 . . . . 5  |-  ( (mulGrp `  R )s  U )  =  ( (mulGrp `  R )s  U
)
42, 3unitgrp 15727 . . . 4  |-  ( R  e.  Ring  ->  ( (mulGrp `  R )s  U )  e.  Grp )
52, 3unitgrpbas 15726 . . . . 5  |-  U  =  ( Base `  (
(mulGrp `  R )s  U
) )
6 nrginvrcn.i . . . . . 6  |-  I  =  ( invr `  R
)
72, 3, 6invrfval 15733 . . . . 5  |-  I  =  ( inv g `  ( (mulGrp `  R )s  U
) )
85, 7grpinvf 14804 . . . 4  |-  ( ( (mulGrp `  R )s  U
)  e.  Grp  ->  I : U --> U )
91, 4, 83syl 19 . . 3  |-  ( R  e. NrmRing  ->  I : U --> U )
10 1rp 10572 . . . . . . . 8  |-  1  e.  RR+
11 ne0i 3594 . . . . . . . 8  |-  ( 1  e.  RR+  ->  RR+  =/=  (/) )
1210, 11ax-mp 8 . . . . . . 7  |-  RR+  =/=  (/)
131ad2antrr 707 . . . . . . . . . . . . . 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 15720 . . . . . . . . . . . . . . 15  |-  U  C_  X
16 simplrl 737 . . . . . . . . . . . . . . 15  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  x  e.  U )
1715, 16sseldi 3306 . . . . . . . . . . . . . 14  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  x  e.  X )
18 simpr 448 . . . . . . . . . . . . . . 15  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  y  e.  U )
1915, 18sseldi 3306 . . . . . . . . . . . . . 14  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  y  e.  X )
20 eqid 2404 . . . . . . . . . . . . . . 15  |-  ( 1r
`  R )  =  ( 1r `  R
)
21 eqid 2404 . . . . . . . . . . . . . . 15  |-  ( 0g
`  R )  =  ( 0g `  R
)
2214, 20, 21rng1eq0 15657 . . . . . . . . . . . . . 14  |-  ( ( R  e.  Ring  /\  x  e.  X  /\  y  e.  X )  ->  (
( 1r `  R
)  =  ( 0g
`  R )  ->  x  =  y )
)
2313, 17, 19, 22syl3anc 1184 . . . . . . . . . . . . 13  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( ( 1r `  R )  =  ( 0g `  R
)  ->  x  =  y ) )
24 eqid 2404 . . . . . . . . . . . . . . . 16  |-  ( I `
 y )  =  ( I `  y
)
25 nrgngp 18651 . . . . . . . . . . . . . . . . . . 19  |-  ( R  e. NrmRing  ->  R  e. NrmGrp )
26 ngpms 18600 . . . . . . . . . . . . . . . . . . 19  |-  ( R  e. NrmGrp  ->  R  e.  MetSp )
27 msxms 18437 . . . . . . . . . . . . . . . . . . 19  |-  ( R  e.  MetSp  ->  R  e.  *
MetSp )
2825, 26, 273syl 19 . . . . . . . . . . . . . . . . . 18  |-  ( R  e. NrmRing  ->  R  e.  * MetSp )
2928ad2antrr 707 . . . . . . . . . . . . . . . . 17  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  R  e.  *
MetSp )
309adantr 452 . . . . . . . . . . . . . . . . . . 19  |-  ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  ->  I : U --> U )
3130ffvelrnda 5829 . . . . . . . . . . . . . . . . . 18  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( I `  y )  e.  U
)
3215, 31sseldi 3306 . . . . . . . . . . . . . . . . 17  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( I `  y )  e.  X
)
33 eqid 2404 . . . . . . . . . . . . . . . . . 18  |-  ( dist `  R )  =  (
dist `  R )
3414, 33xmseq0 18447 . . . . . . . . . . . . . . . . 17  |-  ( ( R  e.  * MetSp  /\  ( I `  y
)  e.  X  /\  ( I `  y
)  e.  X )  ->  ( ( ( I `  y ) ( dist `  R
) ( I `  y ) )  =  0  <->  ( I `  y )  =  ( I `  y ) ) )
3529, 32, 32, 34syl3anc 1184 . . . . . . . . . . . . . . . 16  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( (
( I `  y
) ( dist `  R
) ( I `  y ) )  =  0  <->  ( I `  y )  =  ( I `  y ) ) )
3624, 35mpbiri 225 . . . . . . . . . . . . . . 15  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( (
I `  y )
( dist `  R )
( I `  y
) )  =  0 )
37 simplrr 738 . . . . . . . . . . . . . . . 16  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  r  e.  RR+ )
3837rpgt0d 10607 . . . . . . . . . . . . . . 15  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  0  <  r )
3936, 38eqbrtrd 4192 . . . . . . . . . . . . . 14  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( (
I `  y )
( dist `  R )
( I `  y
) )  <  r
)
40 fveq2 5687 . . . . . . . . . . . . . . . 16  |-  ( x  =  y  ->  (
I `  x )  =  ( I `  y ) )
4140oveq1d 6055 . . . . . . . . . . . . . . 15  |-  ( x  =  y  ->  (
( I `  x
) ( dist `  R
) ( I `  y ) )  =  ( ( I `  y ) ( dist `  R ) ( I `
 y ) ) )
4241breq1d 4182 . . . . . . . . . . . . . 14  |-  ( x  =  y  ->  (
( ( I `  x ) ( dist `  R ) ( I `
 y ) )  <  r  <->  ( (
I `  y )
( dist `  R )
( I `  y
) )  <  r
) )
4339, 42syl5ibrcom 214 . . . . . . . . . . . . 13  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( x  =  y  ->  ( ( I `  x ) ( dist `  R
) ( I `  y ) )  < 
r ) )
4423, 43syld 42 . . . . . . . . . . . 12  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( ( 1r `  R )  =  ( 0g `  R
)  ->  ( (
I `  x )
( dist `  R )
( I `  y
) )  <  r
) )
4544imp 419 . . . . . . . . . . 11  |-  ( ( ( ( R  e. NrmRing  /\  ( x  e.  U  /\  r  e.  RR+ )
)  /\  y  e.  U )  /\  ( 1r `  R )  =  ( 0g `  R
) )  ->  (
( I `  x
) ( dist `  R
) ( I `  y ) )  < 
r )
4645an32s 780 . . . . . . . . . 10  |-  ( ( ( ( R  e. NrmRing  /\  ( x  e.  U  /\  r  e.  RR+ )
)  /\  ( 1r `  R )  =  ( 0g `  R ) )  /\  y  e.  U )  ->  (
( I `  x
) ( dist `  R
) ( I `  y ) )  < 
r )
4746a1d 23 . . . . . . . . 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 ) )
4847ralrimiva 2749 . . . . . . . 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
) )
4948ralrimivw 2750 . . . . . . 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
) )
50 r19.2z 3677 . . . . . . 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
) )
5112, 49, 50sylancr 645 . . . . . 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
) )
52 eqid 2404 . . . . . . 7  |-  ( norm `  R )  =  (
norm `  R )
53 simpll 731 . . . . . . 7  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  R  e. NrmRing )
541ad2antrr 707 . . . . . . . 8  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  R  e.  Ring )
55 simpr 448 . . . . . . . 8  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  ( 1r `  R )  =/=  ( 0g `  R ) )
5620, 21isnzr 16285 . . . . . . . 8  |-  ( R  e. NzRing 
<->  ( R  e.  Ring  /\  ( 1r `  R
)  =/=  ( 0g
`  R ) ) )
5754, 55, 56sylanbrc 646 . . . . . . 7  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  R  e. NzRing )
58 simplrl 737 . . . . . . 7  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  x  e.  U
)
59 simplrr 738 . . . . . . 7  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  ( 1r `  R )  =/=  ( 0g `  R ) )  ->  r  e.  RR+ )
60 eqid 2404 . . . . . . 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 ) )
6114, 2, 6, 52, 33, 53, 57, 58, 59, 60nrginvrcnlem 18679 . . . . . 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 ) )
6251, 61pm2.61dane 2645 . . . . 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 ) )
6316, 18ovresd 6173 . . . . . . . . 9  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( x
( ( dist `  R
)  |`  ( U  X.  U ) ) y )  =  ( x ( dist `  R
) y ) )
6463breq1d 4182 . . . . . . . 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 ) )
65 simpl 444 . . . . . . . . . . . 12  |-  ( ( x  e.  U  /\  r  e.  RR+ )  ->  x  e.  U )
66 ffvelrn 5827 . . . . . . . . . . . 12  |-  ( ( I : U --> U  /\  x  e.  U )  ->  ( I `  x
)  e.  U )
679, 65, 66syl2an 464 . . . . . . . . . . 11  |-  ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  ->  ( I `  x )  e.  U
)
6867adantr 452 . . . . . . . . . 10  |-  ( ( ( R  e. NrmRing  /\  (
x  e.  U  /\  r  e.  RR+ ) )  /\  y  e.  U
)  ->  ( I `  x )  e.  U
)
6968, 31ovresd 6173 . . . . . . . . 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 ) ) )
7069breq1d 4182 . . . . . . . 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 ) )
7164, 70imbi12d 312 . . . . . . 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
) ) )
7271ralbidva 2682 . . . . . 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
) ) )
7372rexbidv 2687 . . . . 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
) ) )
7462, 73mpbird 224 . . . 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
) )
7574ralrimivva 2758 . . 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 ) )
76 xpss12 4940 . . . . . . 7  |-  ( ( U  C_  X  /\  U  C_  X )  -> 
( U  X.  U
)  C_  ( X  X.  X ) )
7715, 15, 76mp2an 654 . . . . . 6  |-  ( U  X.  U )  C_  ( X  X.  X
)
78 resabs1 5134 . . . . . 6  |-  ( ( U  X.  U ) 
C_  ( X  X.  X )  ->  (
( ( dist `  R
)  |`  ( X  X.  X ) )  |`  ( U  X.  U
) )  =  ( ( dist `  R
)  |`  ( U  X.  U ) ) )
7977, 78ax-mp 8 . . . . 5  |-  ( ( ( dist `  R
)  |`  ( X  X.  X ) )  |`  ( U  X.  U
) )  =  ( ( dist `  R
)  |`  ( U  X.  U ) )
8025, 26syl 16 . . . . . . 7  |-  ( R  e. NrmRing  ->  R  e.  MetSp )
81 eqid 2404 . . . . . . . 8  |-  ( (
dist `  R )  |`  ( X  X.  X
) )  =  ( ( dist `  R
)  |`  ( X  X.  X ) )
8214, 81xmsxmet 18439 . . . . . . 7  |-  ( R  e.  * MetSp  ->  (
( dist `  R )  |`  ( X  X.  X
) )  e.  ( * Met `  X
) )
8380, 27, 823syl 19 . . . . . 6  |-  ( R  e. NrmRing  ->  ( ( dist `  R )  |`  ( X  X.  X ) )  e.  ( * Met `  X ) )
84 xmetres2 18344 . . . . . 6  |-  ( ( ( ( dist `  R
)  |`  ( X  X.  X ) )  e.  ( * Met `  X
)  /\  U  C_  X
)  ->  ( (
( dist `  R )  |`  ( X  X.  X
) )  |`  ( U  X.  U ) )  e.  ( * Met `  U ) )
8583, 15, 84sylancl 644 . . . . 5  |-  ( R  e. NrmRing  ->  ( ( (
dist `  R )  |`  ( X  X.  X
) )  |`  ( U  X.  U ) )  e.  ( * Met `  U ) )
8679, 85syl5eqelr 2489 . . . 4  |-  ( R  e. NrmRing  ->  ( ( dist `  R )  |`  ( U  X.  U ) )  e.  ( * Met `  U ) )
87 eqid 2404 . . . . 5  |-  ( MetOpen `  ( ( dist `  R
)  |`  ( U  X.  U ) ) )  =  ( MetOpen `  (
( dist `  R )  |`  ( U  X.  U
) ) )
8887, 87metcn 18526 . . . 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 ) ) ) )
8986, 86, 88syl2anc 643 . . 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
) ) ) )
909, 75, 89mpbir2and 889 . 2  |-  ( R  e. NrmRing  ->  I  e.  ( ( MetOpen `  ( ( dist `  R )  |`  ( U  X.  U
) ) )  Cn  ( MetOpen `  ( ( dist `  R )  |`  ( U  X.  U
) ) ) ) )
91 nrginvrcn.j . . . . . . 7  |-  J  =  ( TopOpen `  R )
9291, 14, 81mstopn 18435 . . . . . 6  |-  ( R  e.  MetSp  ->  J  =  ( MetOpen `  ( ( dist `  R )  |`  ( X  X.  X
) ) ) )
9325, 26, 923syl 19 . . . . 5  |-  ( R  e. NrmRing  ->  J  =  (
MetOpen `  ( ( dist `  R )  |`  ( X  X.  X ) ) ) )
9493oveq1d 6055 . . . 4  |-  ( R  e. NrmRing  ->  ( Jt  U )  =  ( ( MetOpen `  ( ( dist `  R
)  |`  ( X  X.  X ) ) )t  U ) )
9579eqcomi 2408 . . . . . 6  |-  ( (
dist `  R )  |`  ( U  X.  U
) )  =  ( ( ( dist `  R
)  |`  ( X  X.  X ) )  |`  ( U  X.  U
) )
96 eqid 2404 . . . . . 6  |-  ( MetOpen `  ( ( dist `  R
)  |`  ( X  X.  X ) ) )  =  ( MetOpen `  (
( dist `  R )  |`  ( X  X.  X
) ) )
9795, 96, 87metrest 18507 . . . . 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 ) ) ) )
9883, 15, 97sylancl 644 . . . 4  |-  ( R  e. NrmRing  ->  ( ( MetOpen `  ( ( dist `  R
)  |`  ( X  X.  X ) ) )t  U )  =  ( MetOpen `  ( ( dist `  R
)  |`  ( U  X.  U ) ) ) )
9994, 98eqtrd 2436 . . 3  |-  ( R  e. NrmRing  ->  ( Jt  U )  =  ( MetOpen `  (
( dist `  R )  |`  ( U  X.  U
) ) ) )
10099, 99oveq12d 6058 . 2  |-  ( R  e. NrmRing  ->  ( ( Jt  U )  Cn  ( Jt  U ) )  =  ( ( MetOpen `  ( ( dist `  R )  |`  ( U  X.  U
) ) )  Cn  ( MetOpen `  ( ( dist `  R )  |`  ( U  X.  U
) ) ) ) )
10190, 100eleqtrrd 2481 1  |-  ( R  e. NrmRing  ->  I  e.  ( ( Jt  U )  Cn  ( Jt  U ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 177    /\ wa 359    = wceq 1649    e. wcel 1721    =/= wne 2567   A.wral 2666   E.wrex 2667    C_ wss 3280   (/)c0 3588   ifcif 3699   class class class wbr 4172    X. cxp 4835    |` cres 4839   -->wf 5409   ` cfv 5413  (class class class)co 6040   0cc0 8946   1c1 8947    x. cmul 8951    < clt 9076    <_ cle 9077    / cdiv 9633   2c2 10005   RR+crp 10568   Basecbs 13424   ↾s cress 13425   distcds 13493   ↾t crest 13603   TopOpenctopn 13604   0gc0g 13678   Grpcgrp 14640  mulGrpcmgp 15603   Ringcrg 15615   1rcur 15617  Unitcui 15699   invrcinvr 15731  NzRingcnzr 16283   * Metcxmt 16641   MetOpencmopn 16646    Cn ccn 17242   *
MetSpcxme 18300   MetSpcmt 18301   normcnm 18577  NrmGrpcngp 18578  NrmRingcnrg 18580
This theorem is referenced by:  nrgtdrg  18681
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1552  ax-5 1563  ax-17 1623  ax-9 1662  ax-8 1683  ax-13 1723  ax-14 1725  ax-6 1740  ax-7 1745  ax-11 1757  ax-12 1946  ax-ext 2385  ax-rep 4280  ax-sep 4290  ax-nul 4298  ax-pow 4337  ax-pr 4363  ax-un 4660  ax-cnex 9002  ax-resscn 9003  ax-1cn 9004  ax-icn 9005  ax-addcl 9006  ax-addrcl 9007  ax-mulcl 9008  ax-mulrcl 9009  ax-mulcom 9010  ax-addass 9011  ax-mulass 9012  ax-distr 9013  ax-i2m1 9014  ax-1ne0 9015  ax-1rid 9016  ax-rnegex 9017  ax-rrecex 9018  ax-cnre 9019  ax-pre-lttri 9020  ax-pre-lttrn 9021  ax-pre-ltadd 9022  ax-pre-mulgt0 9023  ax-pre-sup 9024
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3or 937  df-3an 938  df-tru 1325  df-ex 1548  df-nf 1551  df-sb 1656  df-eu 2258  df-mo 2259  df-clab 2391  df-cleq 2397  df-clel 2400  df-nfc 2529  df-ne 2569  df-nel 2570  df-ral 2671  df-rex 2672  df-reu 2673  df-rmo 2674  df-rab 2675  df-v 2918  df-sbc 3122  df-csb 3212  df-dif 3283  df-un 3285  df-in 3287  df-ss 3294  df-pss 3296  df-nul 3589  df-if 3700  df-pw 3761  df-sn 3780  df-pr 3781  df-tp 3782  df-op 3783  df-uni 3976  df-int 4011  df-iun 4055  df-br 4173  df-opab 4227  df-mpt 4228  df-tr 4263  df-eprel 4454  df-id 4458  df-po 4463  df-so 4464  df-fr 4501  df-we 4503  df-ord 4544  df-on 4545  df-lim 4546  df-suc 4547  df-om 4805  df-xp 4843  df-rel 4844  df-cnv 4845  df-co 4846  df-dm 4847  df-rn 4848  df-res 4849  df-ima 4850  df-iota 5377  df-fun 5415  df-fn 5416  df-f 5417  df-f1 5418  df-fo 5419  df-f1o 5420  df-fv 5421  df-ov 6043  df-oprab 6044  df-mpt2 6045  df-1st 6308  df-2nd 6309  df-tpos 6438  df-riota 6508  df-recs 6592  df-rdg 6627  df-1o 6683  df-oadd 6687  df-er 6864  df-map 6979  df-en 7069  df-dom 7070  df-sdom 7071  df-fin 7072  df-sup 7404  df-pnf 9078  df-mnf 9079  df-xr 9080  df-ltxr 9081  df-le 9082  df-sub 9249  df-neg 9250  df-div 9634  df-nn 9957  df-2 10014  df-3 10015  df-4 10016  df-5 10017  df-6 10018  df-7 10019  df-8 10020  df-9 10021  df-10 10022  df-n0 10178  df-z 10239  df-dec 10339  df-uz 10445  df-q 10531  df-rp 10569  df-xneg 10666  df-xadd 10667  df-xmul 10668  df-fz 11000  df-seq 11279  df-exp 11338  df-cj 11859  df-re 11860  df-im 11861  df-sqr 11995  df-abs 11996  df-struct 13426  df-ndx 13427  df-slot 13428  df-base 13429  df-sets 13430  df-ress 13431  df-plusg 13497  df-mulr 13498  df-tset 13503  df-ple 13504  df-ds 13506  df-rest 13605  df-topgen 13622  df-xrs 13681  df-0g 13682  df-mnd 14645  df-grp 14767  df-minusg 14768  df-sbg 14769  df-mgp 15604  df-rng 15618  df-ur 15620  df-oppr 15683  df-dvdsr 15701  df-unit 15702  df-invr 15732  df-abv 15860  df-nzr 16284  df-psmet 16649  df-xmet 16650  df-met 16651  df-bl 16652  df-mopn 16653  df-top 16918  df-bases 16920  df-topon 16921  df-topsp 16922  df-cn 17245  df-cnp 17246  df-xms 18303  df-ms 18304  df-nm 18583  df-ngp 18584  df-nrg 18586
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