Can someone help me with this...TIA
Let G be a group which satisfies the following property:
Whenever x,y,z are elements of G such that xy=yz, then x=z.
Prove that G must be Abelian.
I don't even know how to start. TIA...
According to Wikipedia, an Abelian group is a group (G,*) such that a*b = b*a for all a,b in G.
now we are told that , for any in G
this means that we can write, or alternatively, . Which is the exact definition of an Abelian Group.
don't take my word for it though, wait until the experts get here