Theorem abl32 13844

Description: Commutative/associative law for Abelian groups. (Contributed by Stefan O'Rear, 10-Apr-2015.) (Revised by Mario Carneiro, 21-Apr-2016.)

Hypotheses

Ref	Expression
ablcom.b	|- B = ( Base ` G )
ablcom.p	|- .+ = ( +g ` G )
abl32.g	|- ( ph -> G e. Abel )
abl32.x	|- ( ph -> X e. B )
abl32.y	|- ( ph -> Y e. B )
abl32.z	|- ( ph -> Z e. B )

Assertion

Ref	Expression
abl32	|- ( ph -> ( ( X .+ Y ) .+ Z ) = ( ( X .+ Z ) .+ Y ) )

Proof of Theorem abl32

Step	Hyp	Ref	Expression
1		abl32.g	. . 3 |- ( ph -> G e. Abel )
2		ablcmn 13828	. . 3 |- ( G e. Abel -> G e. CMnd )
3	1, 2	syl 14	. 2 |- ( ph -> G e. CMnd )
4		abl32.x	. 2 |- ( ph -> X e. B )
5		abl32.y	. 2 |- ( ph -> Y e. B )
6		abl32.z	. 2 |- ( ph -> Z e. B )
7		ablcom.b	. . 3 |- B = ( Base ` G )
8		ablcom.p	. . 3 |- .+ = ( +g ` G )
9	7, 8	cmn32 13841	. 2 |- ( ( G e. CMnd /\ ( X e. B /\ Y e. B /\ Z e. B ) ) -> ( ( X .+ Y ) .+ Z ) = ( ( X .+ Z ) .+ Y ) )
10	3, 4, 5, 6, 9	syl13anc 1273	1 |- ( ph -> ( ( X .+ Y ) .+ Z ) = ( ( X .+ Z ) .+ Y ) )

Syntax hints:   -> wi 4   = wceq 1395   e. wcel 2200   ` cfv 5318  (class class class)co 6001   Basecbs 13032   +g cplusg 13110  CMndccmn 13821   Abelcabl 13822

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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-cnex 8090  ax-resscn 8091  ax-1re 8093  ax-addrcl 8096

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-rab 2517  df-v 2801  df-sbc 3029  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-iota 5278  df-fun 5320  df-fn 5321  df-fv 5326  df-ov 6004  df-inn 9111  df-2 9169  df-ndx 13035  df-slot 13036  df-base 13038  df-plusg 13123  df-sgrp 13435  df-mnd 13450  df-cmn 13823  df-abl 13824

This theorem is referenced by: (None)