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Theorem ringcl 12989
Description: Closure of the multiplication operation of a ring. (Contributed by NM, 26-Aug-2011.) (Revised by Mario Carneiro, 6-Jan-2015.)
Hypotheses
Ref Expression
ringcl.b  |-  B  =  ( Base `  R
)
ringcl.t  |-  .x.  =  ( .r `  R )
Assertion
Ref Expression
ringcl  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  ( X  .x.  Y )  e.  B )

Proof of Theorem ringcl
StepHypRef Expression
1 eqid 2175 . . . . 5  |-  (mulGrp `  R )  =  (mulGrp `  R )
21ringmgp 12978 . . . 4  |-  ( R  e.  Ring  ->  (mulGrp `  R )  e.  Mnd )
323ad2ant1 1018 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  (mulGrp `  R )  e.  Mnd )
4 simp2 998 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  X  e.  B )
5 ringcl.b . . . . . . 7  |-  B  =  ( Base `  R
)
61, 5mgpbasg 12930 . . . . . 6  |-  ( R  e.  Ring  ->  B  =  ( Base `  (mulGrp `  R ) ) )
76eleq2d 2245 . . . . 5  |-  ( R  e.  Ring  ->  ( X  e.  B  <->  X  e.  ( Base `  (mulGrp `  R
) ) ) )
873ad2ant1 1018 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  ( X  e.  B  <->  X  e.  ( Base `  (mulGrp `  R
) ) ) )
94, 8mpbid 147 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  X  e.  ( Base `  (mulGrp `  R ) ) )
10 simp3 999 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  Y  e.  B )
116eleq2d 2245 . . . . 5  |-  ( R  e.  Ring  ->  ( Y  e.  B  <->  Y  e.  ( Base `  (mulGrp `  R
) ) ) )
12113ad2ant1 1018 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  ( Y  e.  B  <->  Y  e.  ( Base `  (mulGrp `  R
) ) ) )
1310, 12mpbid 147 . . 3  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  Y  e.  ( Base `  (mulGrp `  R ) ) )
14 eqid 2175 . . . 4  |-  ( Base `  (mulGrp `  R )
)  =  ( Base `  (mulGrp `  R )
)
15 eqid 2175 . . . 4  |-  ( +g  `  (mulGrp `  R )
)  =  ( +g  `  (mulGrp `  R )
)
1614, 15mndcl 12689 . . 3  |-  ( ( (mulGrp `  R )  e.  Mnd  /\  X  e.  ( Base `  (mulGrp `  R ) )  /\  Y  e.  ( Base `  (mulGrp `  R )
) )  ->  ( X ( +g  `  (mulGrp `  R ) ) Y )  e.  ( Base `  (mulGrp `  R )
) )
173, 9, 13, 16syl3anc 1238 . 2  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  ( X ( +g  `  (mulGrp `  R ) ) Y )  e.  ( Base `  (mulGrp `  R )
) )
18 ringcl.t . . . . . 6  |-  .x.  =  ( .r `  R )
191, 18mgpplusgg 12929 . . . . 5  |-  ( R  e.  Ring  ->  .x.  =  ( +g  `  (mulGrp `  R ) ) )
2019oveqd 5882 . . . 4  |-  ( R  e.  Ring  ->  ( X 
.x.  Y )  =  ( X ( +g  `  (mulGrp `  R )
) Y ) )
2120, 6eleq12d 2246 . . 3  |-  ( R  e.  Ring  ->  ( ( X  .x.  Y )  e.  B  <->  ( X
( +g  `  (mulGrp `  R ) ) Y )  e.  ( Base `  (mulGrp `  R )
) ) )
22213ad2ant1 1018 . 2  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  (
( X  .x.  Y
)  e.  B  <->  ( X
( +g  `  (mulGrp `  R ) ) Y )  e.  ( Base `  (mulGrp `  R )
) ) )
2317, 22mpbird 167 1  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  ( X  .x.  Y )  e.  B )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 105    /\ w3a 978    = wceq 1353    e. wcel 2146   ` cfv 5208  (class class class)co 5865   Basecbs 12428   +g cplusg 12492   .rcmulr 12493   Mndcmnd 12682  mulGrpcmgp 12925   Ringcrg 12972
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 1445  ax-7 1446  ax-gen 1447  ax-ie1 1491  ax-ie2 1492  ax-8 1502  ax-10 1503  ax-11 1504  ax-i12 1505  ax-bndl 1507  ax-4 1508  ax-17 1524  ax-i9 1528  ax-ial 1532  ax-i5r 1533  ax-13 2148  ax-14 2149  ax-ext 2157  ax-sep 4116  ax-pow 4169  ax-pr 4203  ax-un 4427  ax-setind 4530  ax-cnex 7877  ax-resscn 7878  ax-1cn 7879  ax-1re 7880  ax-icn 7881  ax-addcl 7882  ax-addrcl 7883  ax-mulcl 7884  ax-addcom 7886  ax-addass 7888  ax-i2m1 7891  ax-0lt1 7892  ax-0id 7894  ax-rnegex 7895  ax-pre-ltirr 7898  ax-pre-ltadd 7902
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1459  df-sb 1761  df-eu 2027  df-mo 2028  df-clab 2162  df-cleq 2168  df-clel 2171  df-nfc 2306  df-ne 2346  df-nel 2441  df-ral 2458  df-rex 2459  df-rab 2462  df-v 2737  df-sbc 2961  df-csb 3056  df-dif 3129  df-un 3131  df-in 3133  df-ss 3140  df-nul 3421  df-pw 3574  df-sn 3595  df-pr 3596  df-op 3598  df-uni 3806  df-int 3841  df-br 3999  df-opab 4060  df-mpt 4061  df-id 4287  df-xp 4626  df-rel 4627  df-cnv 4628  df-co 4629  df-dm 4630  df-rn 4631  df-res 4632  df-iota 5170  df-fun 5210  df-fn 5211  df-fv 5216  df-ov 5868  df-oprab 5869  df-mpo 5870  df-pnf 7968  df-mnf 7969  df-ltxr 7971  df-inn 8891  df-2 8949  df-3 8950  df-ndx 12431  df-slot 12432  df-base 12434  df-sets 12435  df-plusg 12505  df-mulr 12506  df-mgm 12640  df-sgrp 12673  df-mnd 12683  df-mgp 12926  df-ring 12974
This theorem is referenced by: (None)
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