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Theorem grplidd 13615
Description: The identity element of a group is a left identity. Deduction associated with grplid 13613. (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 13613 . 2  |-  ( ( G  e.  Grp  /\  X  e.  B )  ->  (  .0.  .+  X
)  =  X )
71, 2, 6syl2anc 411 1  |-  ( ph  ->  (  .0.  .+  X
)  =  X )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1397    e. wcel 2202   ` cfv 5326  (class class class)co 6017   Basecbs 13081   +g cplusg 13159   0gc0g 13338   Grpcgrp 13582
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-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-cnex 8122  ax-resscn 8123  ax-1re 8125  ax-addrcl 8128
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-reu 2517  df-rmo 2518  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-iota 5286  df-fun 5328  df-fn 5329  df-fv 5334  df-riota 5970  df-ov 6020  df-inn 9143  df-2 9201  df-ndx 13084  df-slot 13085  df-base 13087  df-plusg 13172  df-0g 13340  df-mgm 13438  df-sgrp 13484  df-mnd 13499  df-grp 13585
This theorem is referenced by:  conjnmz  13865  mplsubgfilemcl  14712
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