[seqfan] Re: "Simple" rings

Charles Greathouse charles.greathouse at case.edu
Sun Dec 30 20:55:27 CET 2012


I didn't see anything under the Index.

Charles Greathouse
Analyst/Programmer
Case Western Reserve University


On Fri, Dec 28, 2012 at 9:51 PM, Neil Sloane <njasloane at gmail.com> wrote:

> Charles, did you look at the entry under "Rings"
> in the Index to the OEIS?
>
> On Fri, Dec 28, 2012 at 9:04 PM, Charles Greathouse <
> charles.greathouse at case.edu> wrote:
>
> > 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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>
>
> --
> Dear Friends, I have now retired from AT&T. New coordinates:
>
> Neil J. A. Sloane, President, OEIS Foundation
> 11 South Adelaide Avenue, Highland Park, NJ 08904, USA
> Phone: 732 828 6098; home page: http://NeilSloane.com
> Email: njasloane at gmail.com
>
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