On Thu, 29 Apr 2004 12:53:52 +0000 (UTC), Marc Olschok <firstname.lastname@example.org> wrote:
>Anonymous wrote: >> Olschok: >> >>> If I >>>> remember correctly, an abelian group is a group that has an invertible >>>table. >>> >>>What is an "invertible table" ? By the way, a group is abelian if the >>>group operation is commutative. >> >> Right. So, if you set up a table with all the set members on the horizontal >> and vertical, it'll form an invertible diagonal because xy = yx. > >An "invertible diagonal" ? ( Are you inventing these on the fly? :-)
Hey, if you don't remember the definitions just invent your own. Doesn't work as well in math as it does in other fields (no pun intended) though.
I suppose he means "has a symmetric Cayley table", which is of course not nearly enough to make it a group.
But if this represents the general level of math understanding of this person I'd say he's got more stuff to prep on than just linear algebra.
-- "I'm not interested in mathematics that might have anything to do with reality." -- Russell Easterly, in sci.math