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Theorem unitmulcl 13213
Description: The product of units is a unit. (Contributed by Mario Carneiro, 2-Dec-2014.)
Hypotheses
Ref Expression
unitmulcl.1  |-  U  =  (Unit `  R )
unitmulcl.2  |-  .x.  =  ( .r `  R )
Assertion
Ref Expression
unitmulcl  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( X  .x.  Y )  e.  U )

Proof of Theorem unitmulcl
StepHypRef Expression
1 simp1 997 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  R  e.  Ring )
2 eqidd 2178 . . . . . 6  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( Base `  R )  =  ( Base `  R
) )
3 unitmulcl.1 . . . . . . 7  |-  U  =  (Unit `  R )
43a1i 9 . . . . . 6  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  U  =  (Unit `  R )
)
5 ringsrg 13155 . . . . . . 7  |-  ( R  e.  Ring  ->  R  e. SRing
)
61, 5syl 14 . . . . . 6  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  R  e. SRing )
7 simp3 999 . . . . . 6  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  Y  e.  U )
82, 4, 6, 7unitcld 13208 . . . . 5  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  Y  e.  ( Base `  R
) )
9 simp2 998 . . . . . . 7  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  X  e.  U )
10 eqidd 2178 . . . . . . . 8  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( 1r `  R )  =  ( 1r `  R
) )
11 eqidd 2178 . . . . . . . 8  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( ||r `  R )  =  (
||r `  R ) )
12 eqidd 2178 . . . . . . . 8  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  (oppr `  R
)  =  (oppr `  R
) )
13 eqidd 2178 . . . . . . . 8  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( ||r `  (oppr
`  R ) )  =  ( ||r `
 (oppr
`  R ) ) )
144, 10, 11, 12, 13, 6isunitd 13206 . . . . . . 7  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( X  e.  U  <->  ( X
( ||r `
 R ) ( 1r `  R )  /\  X ( ||r `  (oppr `  R
) ) ( 1r
`  R ) ) ) )
159, 14mpbid 147 . . . . . 6  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( X ( ||r `
 R ) ( 1r `  R )  /\  X ( ||r `  (oppr `  R
) ) ( 1r
`  R ) ) )
1615simpld 112 . . . . 5  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  X
( ||r `
 R ) ( 1r `  R ) )
17 eqid 2177 . . . . . 6  |-  ( Base `  R )  =  (
Base `  R )
18 eqid 2177 . . . . . 6  |-  ( ||r `  R
)  =  ( ||r `  R
)
19 unitmulcl.2 . . . . . 6  |-  .x.  =  ( .r `  R )
2017, 18, 19dvdsrmul1 13202 . . . . 5  |-  ( ( R  e.  Ring  /\  Y  e.  ( Base `  R
)  /\  X ( ||r `  R ) ( 1r
`  R ) )  ->  ( X  .x.  Y ) ( ||r `  R
) ( ( 1r
`  R )  .x.  Y ) )
211, 8, 16, 20syl3anc 1238 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( X  .x.  Y ) (
||r `  R ) ( ( 1r `  R ) 
.x.  Y ) )
22 eqid 2177 . . . . . 6  |-  ( 1r
`  R )  =  ( 1r `  R
)
2317, 19, 22ringlidm 13137 . . . . 5  |-  ( ( R  e.  Ring  /\  Y  e.  ( Base `  R
) )  ->  (
( 1r `  R
)  .x.  Y )  =  Y )
241, 8, 23syl2anc 411 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  (
( 1r `  R
)  .x.  Y )  =  Y )
2521, 24breqtrd 4028 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( X  .x.  Y ) (
||r `  R ) Y )
264, 10, 11, 12, 13, 6isunitd 13206 . . . . 5  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( Y  e.  U  <->  ( Y
( ||r `
 R ) ( 1r `  R )  /\  Y ( ||r `  (oppr `  R
) ) ( 1r
`  R ) ) ) )
277, 26mpbid 147 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( Y ( ||r `
 R ) ( 1r `  R )  /\  Y ( ||r `  (oppr `  R
) ) ( 1r
`  R ) ) )
2827simpld 112 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  Y
( ||r `
 R ) ( 1r `  R ) )
2917, 18dvdsrtr 13201 . . 3  |-  ( ( R  e.  Ring  /\  ( X  .x.  Y ) (
||r `  R ) Y  /\  Y ( ||r `
 R ) ( 1r `  R ) )  ->  ( X  .x.  Y ) ( ||r `  R
) ( 1r `  R ) )
301, 25, 28, 29syl3anc 1238 . 2  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( X  .x.  Y ) (
||r `  R ) ( 1r
`  R ) )
31 eqid 2177 . . . . 5  |-  (oppr `  R
)  =  (oppr `  R
)
3231opprring 13180 . . . 4  |-  ( R  e.  Ring  ->  (oppr `  R
)  e.  Ring )
331, 32syl 14 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  (oppr `  R
)  e.  Ring )
342, 4, 6, 9unitcld 13208 . . . . . 6  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  X  e.  ( Base `  R
) )
3531, 17opprbasg 13178 . . . . . . 7  |-  ( R  e.  Ring  ->  ( Base `  R )  =  (
Base `  (oppr
`  R ) ) )
361, 35syl 14 . . . . . 6  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( Base `  R )  =  ( Base `  (oppr `  R
) ) )
3734, 36eleqtrd 2256 . . . . 5  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  X  e.  ( Base `  (oppr `  R
) ) )
3827simprd 114 . . . . 5  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  Y
( ||r `
 (oppr
`  R ) ) ( 1r `  R
) )
39 eqid 2177 . . . . . 6  |-  ( Base `  (oppr
`  R ) )  =  ( Base `  (oppr `  R
) )
40 eqid 2177 . . . . . 6  |-  ( ||r `  (oppr `  R
) )  =  (
||r `  (oppr
`  R ) )
41 eqid 2177 . . . . . 6  |-  ( .r
`  (oppr
`  R ) )  =  ( .r `  (oppr `  R ) )
4239, 40, 41dvdsrmul1 13202 . . . . 5  |-  ( ( (oppr
`  R )  e. 
Ring  /\  X  e.  (
Base `  (oppr
`  R ) )  /\  Y ( ||r `  (oppr `  R
) ) ( 1r
`  R ) )  ->  ( Y ( .r `  (oppr `  R
) ) X ) ( ||r `
 (oppr
`  R ) ) ( ( 1r `  R ) ( .r
`  (oppr
`  R ) ) X ) )
4333, 37, 38, 42syl3anc 1238 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( Y ( .r `  (oppr `  R ) ) X ) ( ||r `
 (oppr
`  R ) ) ( ( 1r `  R ) ( .r
`  (oppr
`  R ) ) X ) )
4417, 19, 31, 41opprmulg 13174 . . . . 5  |-  ( ( R  e.  Ring  /\  Y  e.  U  /\  X  e.  U )  ->  ( Y ( .r `  (oppr `  R ) ) X )  =  ( X 
.x.  Y ) )
45443com23 1209 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( Y ( .r `  (oppr `  R ) ) X )  =  ( X 
.x.  Y ) )
4617, 22srgidcl 13090 . . . . . . 7  |-  ( R  e. SRing  ->  ( 1r `  R )  e.  (
Base `  R )
)
476, 46syl 14 . . . . . 6  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( 1r `  R )  e.  ( Base `  R
) )
4817, 19, 31, 41opprmulg 13174 . . . . . 6  |-  ( ( R  e.  Ring  /\  ( 1r `  R )  e.  ( Base `  R
)  /\  X  e.  U )  ->  (
( 1r `  R
) ( .r `  (oppr `  R ) ) X )  =  ( X 
.x.  ( 1r `  R ) ) )
491, 47, 9, 48syl3anc 1238 . . . . 5  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  (
( 1r `  R
) ( .r `  (oppr `  R ) ) X )  =  ( X 
.x.  ( 1r `  R ) ) )
5017, 19, 22ringridm 13138 . . . . . 6  |-  ( ( R  e.  Ring  /\  X  e.  ( Base `  R
) )  ->  ( X  .x.  ( 1r `  R ) )  =  X )
511, 34, 50syl2anc 411 . . . . 5  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( X  .x.  ( 1r `  R ) )  =  X )
5249, 51eqtrd 2210 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  (
( 1r `  R
) ( .r `  (oppr `  R ) ) X )  =  X )
5343, 45, 523brtr3d 4033 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( X  .x.  Y ) (
||r `  (oppr
`  R ) ) X )
5415simprd 114 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  X
( ||r `
 (oppr
`  R ) ) ( 1r `  R
) )
5539, 40dvdsrtr 13201 . . 3  |-  ( ( (oppr
`  R )  e. 
Ring  /\  ( X  .x.  Y ) ( ||r `  (oppr `  R
) ) X  /\  X ( ||r `
 (oppr
`  R ) ) ( 1r `  R
) )  ->  ( X  .x.  Y ) (
||r `  (oppr
`  R ) ) ( 1r `  R
) )
5633, 53, 54, 55syl3anc 1238 . 2  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( X  .x.  Y ) (
||r `  (oppr
`  R ) ) ( 1r `  R
) )
574, 10, 11, 12, 13, 6isunitd 13206 . 2  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  (
( X  .x.  Y
)  e.  U  <->  ( ( X  .x.  Y ) (
||r `  R ) ( 1r
`  R )  /\  ( X  .x.  Y ) ( ||r `
 (oppr
`  R ) ) ( 1r `  R
) ) ) )
5830, 56, 57mpbir2and 944 1  |-  ( ( R  e.  Ring  /\  X  e.  U  /\  Y  e.  U )  ->  ( X  .x.  Y )  e.  U )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    /\ w3a 978    = wceq 1353    e. wcel 2148   class class class wbr 4002   ` cfv 5215  (class class class)co 5872   Basecbs 12454   .rcmulr 12529   1rcur 13073  SRingcsrg 13077   Ringcrg 13110  opprcoppr 13170   ||rcdsr 13186  Unitcui 13187
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-coll 4117  ax-sep 4120  ax-nul 4128  ax-pow 4173  ax-pr 4208  ax-un 4432  ax-setind 4535  ax-cnex 7899  ax-resscn 7900  ax-1cn 7901  ax-1re 7902  ax-icn 7903  ax-addcl 7904  ax-addrcl 7905  ax-mulcl 7906  ax-addcom 7908  ax-addass 7910  ax-i2m1 7913  ax-0lt1 7914  ax-0id 7916  ax-rnegex 7917  ax-pre-ltirr 7920  ax-pre-lttrn 7922  ax-pre-ltadd 7924
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ne 2348  df-nel 2443  df-ral 2460  df-rex 2461  df-reu 2462  df-rmo 2463  df-rab 2464  df-v 2739  df-sbc 2963  df-csb 3058  df-dif 3131  df-un 3133  df-in 3135  df-ss 3142  df-nul 3423  df-pw 3577  df-sn 3598  df-pr 3599  df-op 3601  df-uni 3810  df-int 3845  df-iun 3888  df-br 4003  df-opab 4064  df-mpt 4065  df-id 4292  df-xp 4631  df-rel 4632  df-cnv 4633  df-co 4634  df-dm 4635  df-rn 4636  df-res 4637  df-ima 4638  df-iota 5177  df-fun 5217  df-fn 5218  df-f 5219  df-f1 5220  df-fo 5221  df-f1o 5222  df-fv 5223  df-riota 5828  df-ov 5875  df-oprab 5876  df-mpo 5877  df-tpos 6243  df-pnf 7990  df-mnf 7991  df-ltxr 7993  df-inn 8916  df-2 8974  df-3 8975  df-ndx 12457  df-slot 12458  df-base 12460  df-sets 12461  df-plusg 12541  df-mulr 12542  df-0g 12695  df-mgm 12707  df-sgrp 12740  df-mnd 12750  df-grp 12812  df-minusg 12813  df-cmn 13021  df-abl 13022  df-mgp 13062  df-ur 13074  df-srg 13078  df-ring 13112  df-oppr 13171  df-dvdsr 13189  df-unit 13190
This theorem is referenced by:  unitmulclb  13214  unitgrp  13216  unitdvcl  13236  rdivmuldivd  13244  lringuplu  13268  subrgugrp  13299
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