Hi,

I need help with the following problem:

consider the ring of 3x3 matrices with entries in the ring Z36.How many matrices are there in the two sided ideal generated by the matrix diag(o,-6,18)?

Attempt at a solution:

I computed the general matrix in the two sided ideal,but counting was complicated since different products of the parameters may be equal in Z36.

I will be gratefull for any help.

Hedi