Compute radical and idempotents of a quotient algebra

asked 2013-07-12 03:50:17 -0600

Bern gravatar image

updated 2015-02-16 07:55:59 -0600

slelievre gravatar image

I tried the following:


I have the following question:

I would like to compute with SAGE the Jacobson radical of the algebra S, all primitive orthogonal idempotents and the central idempotents.

Of course, you can compute this by hand, but I am interested in more complicated examples, too (also in matrix algebras), but wanted to start with this simple example.

Since I am relatively new to Sage, I unfortunately do not know how to compute this.

I would be grateful for any help.

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In the meantime I have learned that these things can be done with the aid of the GAP-package QPA. This also works in SAGE via letting GAP be the intermediator.

Bern gravatar imageBern ( 2018-01-20 08:42:39 -0600 )edit