[seqfan] Re: "Simple" rings

Charles Greathouse charles.greathouse at case.edu
Sat Dec 29 03:04:22 CET 2012


So is there a sequence in the OEIS for "number of directly indecomposable
rings of order n"?

Charles Greathouse
Analyst/Programmer
Case Western Reserve University


On Fri, Dec 28, 2012 at 6:58 PM, Rob Arthan <rda at lemma-one.com> wrote:

>
> On Dec 28, 2012, at 9:53 PM, W. Edwin Clark <wclark at mail.usf.edu> wrote:
>
> > I'm not sure there is a name for (associative) rings that are not direct
> > sums of other rings.
>
> The accepted term for this property in universal algebra is "directly
> indecomposable", I believe.
>
> Regards,
>
> Rob.
>
>
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