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Theorem grpinvval2 12812
Description: A df-neg 8105-like equation for inverse in terms of group subtraction. (Contributed by Mario Carneiro, 4-Oct-2015.)
Hypotheses
Ref Expression
grpsubcl.b  |-  B  =  ( Base `  G
)
grpsubcl.m  |-  .-  =  ( -g `  G )
grpinvsub.n  |-  N  =  ( invg `  G )
grpinvval2.z  |-  .0.  =  ( 0g `  G )
Assertion
Ref Expression
grpinvval2  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  ( N `  X
)  =  (  .0.  .-  X ) )

Proof of Theorem grpinvval2
StepHypRef Expression
1 grpsubcl.b . . . 4  |-  B  =  ( Base `  G
)
2 grpinvval2.z . . . 4  |-  .0.  =  ( 0g `  G )
31, 2grpidcl 12764 . . 3  |-  ( G  e.  Grp  ->  .0.  e.  B )
4 eqid 2175 . . . 4  |-  ( +g  `  G )  =  ( +g  `  G )
5 grpinvsub.n . . . 4  |-  N  =  ( invg `  G )
6 grpsubcl.m . . . 4  |-  .-  =  ( -g `  G )
71, 4, 5, 6grpsubval 12779 . . 3  |-  ( (  .0.  e.  B  /\  X  e.  B )  ->  (  .0.  .-  X
)  =  (  .0.  ( +g  `  G
) ( N `  X ) ) )
83, 7sylan 283 . 2  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  (  .0.  .-  X
)  =  (  .0.  ( +g  `  G
) ( N `  X ) ) )
91, 5grpinvcl 12781 . . 3  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  ( N `  X
)  e.  B )
101, 4, 2grplid 12766 . . 3  |-  ( ( G  e.  Grp  /\  ( N `  X )  e.  B )  -> 
(  .0.  ( +g  `  G ) ( N `
 X ) )  =  ( N `  X ) )
119, 10syldan 282 . 2  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  (  .0.  ( +g  `  G ) ( N `
 X ) )  =  ( N `  X ) )
128, 11eqtr2d 2209 1  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  ( N `  X
)  =  (  .0.  .-  X ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1353    e. wcel 2146   ` cfv 5208  (class class class)co 5865   Basecbs 12428   +g cplusg 12492   0gc0g 12626   Grpcgrp 12738   invgcminusg 12739   -gcsg 12740
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-coll 4113  ax-sep 4116  ax-pow 4169  ax-pr 4203  ax-un 4427  ax-setind 4530  ax-cnex 7877  ax-resscn 7878  ax-1re 7880  ax-addrcl 7883
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-ral 2458  df-rex 2459  df-reu 2460  df-rmo 2461  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-pw 3574  df-sn 3595  df-pr 3596  df-op 3598  df-uni 3806  df-int 3841  df-iun 3884  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-ima 4633  df-iota 5170  df-fun 5210  df-fn 5211  df-f 5212  df-f1 5213  df-fo 5214  df-f1o 5215  df-fv 5216  df-riota 5821  df-ov 5868  df-oprab 5869  df-mpo 5870  df-1st 6131  df-2nd 6132  df-inn 8891  df-2 8949  df-ndx 12431  df-slot 12432  df-base 12434  df-plusg 12505  df-0g 12628  df-mgm 12640  df-sgrp 12673  df-mnd 12683  df-grp 12741  df-minusg 12742  df-sbg 12743
This theorem is referenced by:  grpsubadd0sub  12816
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