On Jan 16, 9:42 pm, William Stein wrote:
> On Fri, Jan 16, 2009 at 9:22 PM, John H Palmieri
> wrote:
>
> > 1. How can I compute the cokernel of a matrix? For example:
>
> > sage: mat = matrix(ZZ, 2, 2, [[1, 0], [0, 2]])
> > sage: M = FreeModule(ZZ, rank=2)
>
> > Then I would like to use M / mat
On Fri, Jan 16, 2009 at 9:22 PM, John H Palmieri wrote:
>
> 1. How can I compute the cokernel of a matrix? For example:
>
> sage: mat = matrix(ZZ, 2, 2, [[1, 0], [0, 2]])
> sage: M = FreeModule(ZZ, rank=2)
>
> Then I would like to use M / mat.image() or M / mat.column_module(),
> but those give e
