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Theorem grprid 9346
Description: The identity element of a group is a right identity.
Hypotheses
Ref Expression
grpidval.1 |- X = ran G
grpidval.2 |- U = (Id` G)
Assertion
Ref Expression
grprid |- ((G e. Grp /\ A e. X) -> (AGU) = A)

Proof of Theorem grprid
StepHypRef Expression
1 grpidval.1 . . 3 |- X = ran G
2 grpidval.2 . . 3 |- U = (Id` G)
31, 2grpidinv2 9344 . 2 |- ((G e. Grp /\ A e. X) -> (((UGA) = A /\ (AGU) = A) /\ E.y e. X ((yGA) = U /\ (AGy) = U)))
4 simplr 449 . 2 |- ((((UGA) = A /\ (AGU) = A) /\ E.y e. X ((yGA) = U /\ (AGy) = U)) -> (AGU) = A)
53, 4syl 12 1 |- ((G e. Grp /\ A e. X) -> (AGU) = A)
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 240   = wceq 1298   e. wcel 1300  E.wrex 2106  ran crn 3987  ` cfv 3998  (class class class)co 4884  Grpcgr 9311  Idcgi 9312
This theorem is referenced by:  grprcan 9347  grpinvid1 9356  grpinvid2 9357  grpasscan2 9362  grppncan 9375  grpnpcan 9376  gxcom 9392  gxid 9396  gxnn0add 9397  gxmodid 9402  ring0rid 9485  ringlz 9487  vc0rid 9518  vcm 9522  nv0rid 9588  cayleylem3 13643  grpdivone 14736  trran2 14757  addnull1 14806
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 1304  ax-gen 1305  ax-8 1306  ax-9 1307  ax-10 1308  ax-11 1309  ax-12 1310  ax-13 1311  ax-14 1312  ax-17 1317  ax-4 1319  ax-5o 1321  ax-6o 1324  ax-9o 1481  ax-10o 1500  ax-16 1580  ax-11o 1588  ax-ext 1865  ax-rep 3428  ax-sep 3438  ax-nul 3445  ax-pow 3481  ax-pr 3524  ax-un 3790
This theorem depends on definitions:  df-bi 164  df-or 241  df-an 242  df-3an 860  df-ex 1327  df-sb 1536  df-eu 1775  df-mo 1776  df-clab 1872  df-cleq 1877  df-clel 1880  df-ne 2019  df-ral 2109  df-rex 2110  df-reu 2111  df-rab 2112  df-v 2294  df-sbc 2454  df-csb 2541  df-dif 2597  df-un 2600  df-in 2603  df-ss 2605  df-nul 2876  df-if 2983  df-pw 3035  df-sn 3049  df-pr 3050  df-op 3053  df-uni 3178  df-br 3339  df-opab 3396  df-id 3586  df-xp 4000  df-rel 4001  df-cnv 4002  df-co 4003  df-dm 4004  df-rn 4005  df-res 4006  df-ima 4007  df-fun 4008  df-fn 4009  df-f 4010  df-f1 4011  df-fo 4012  df-f1o 4013  df-fv 4014  df-opr 4886  df-grp 9316  df-gid 9317
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