On Sun, Jul 4, 2010 at 11:56 PM, Georg S. Weber
<georgswe...@googlemail.com> wrote:
> Yeah, I do favor working with Sage over, say, working with Magma,
> because if I run into a bug like this (nice one, eh'?):
> {{{
> sage: V = span([[1/7,0,0] ,[0,1,0]], ZZ); V
> Free module of degree 3 and rank 2 over Integer Ring
> Echelon basis matrix:
> [1/7 0 0]
> [ 0 1 0]
> sage: T = matrix(ZZ,3,[1,0,0,0,0,0,0,0,0]); T
> [1 0 0]
> [0 0 0]
> [0 0 0]
> sage: W = T.kernel_on(V); W.basis()
> [
> (0, 1, 0)
> ]
> sage: W.is_submodule(V)
> False
> }}}
> then I can debug it, and fix it (!), all on myself. That one hit me
> during an intermediate step in some general Hecke module code, so from
> the beginning, it was far from obvious where to look. (Patch is up for
> review at #9425 ...)
And I love Sage because people like you fix bugs in my code!
-- William
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