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Theorem grplidd 13838
Description: The identity element of a group is a left identity. Deduction associated with grplid 13836. (Contributed by SN, 29-Jan-2025.)
Hypotheses
Ref Expression
grpbn0.b  |-  B  =  ( Base `  G
)
grplid.p  |-  .+  =  ( +g  `  G )
grplid.o  |-  .0.  =  ( 0g `  G )
grplidd.g  |-  ( ph  ->  G  e.  Grp )
grplidd.1  |-  ( ph  ->  X  e.  B )
Assertion
Ref Expression
grplidd  |-  ( ph  ->  (  .0.  .+  X
)  =  X )

Proof of Theorem grplidd
StepHypRef Expression
1 grplidd.g . 2  |-  ( ph  ->  G  e.  Grp )
2 grplidd.1 . 2  |-  ( ph  ->  X  e.  B )
3 grpbn0.b . . 3  |-  B  =  ( Base `  G
)
4 grplid.p . . 3  |-  .+  =  ( +g  `  G )
5 grplid.o . . 3  |-  .0.  =  ( 0g `  G )
63, 4, 5grplid 13836 . 2  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  (  .0.  .+  X
)  =  X )
71, 2, 6syl2anc 415 1  |-  ( ph  ->  (  .0.  .+  X
)  =  X )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    = wceq 1402    e. wcel 2209   ` cfv 5377  (class class class)co 6085   Basecbs 13352   +g cplusg 13431   0gc0g 13610   Grpcgrp 13805
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-cnex 8270  ax-resscn 8271  ax-1re 8273  ax-addrcl 8276
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-reu 2535  df-rmo 2536  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-iota 5337  df-fun 5379  df-fn 5380  df-fv 5385  df-riota 6038  df-ov 6088  df-inn 9305  df-2 9363  df-ndx 13355  df-slot 13356  df-base 13358  df-plusg 13444  df-0g 13612  df-mgm 13676  df-sgrp 13717  df-mnd 13730  df-grp 13808
This theorem is used by:  conjnmz  14082  mplsubgfilemcl  15090
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