Date: Apr 29, 2004 11:28 AM
Author: Toni Lassila
Subject: Re: Failing Linear Algebra:
On Thu, 29 Apr 2004 12:53:52 +0000 (UTC), Marc Olschok

<sa796ol@l1-hrz.uni-duisburg.de> 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