Re: [OT] Algebra (was: Re: Is Concatenation that complex?)
Re: [OT] Algebra (was: Re: Is Concatenation that complex?)
- Subject: Re: [OT] Algebra (was: Re: Is Concatenation that complex?)
- From: David Blanton <email@hidden>
- Date: Fri, 23 Apr 2004 09:36:33 -0600
On 4/23/04 8:10 AM, "Kay Roepke" <email@hidden> wrote:
>
On 23. Apr 2004, at 10:40 Uhr, Marco Scheurer wrote:
>
>
> In my book "+" is used for, among other properties, commutative
>
> operations. Here a+b is not the same as b+a.
>
>
Yeah...strings are obviously members of left- resp. right-modules
>
rather than of vectorspaces.
>
Aah, well...those were good times ;-)
>
>
Kay
>
+ is only commutative over certain sets ...
Consider matrix addition where A + B != B + A !
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