[SciPy-user] determinant of a sparse matrix
Sun Dec 21 06:47:33 CST 2008
On Sat, Dec 20, 2008 at 8:32 AM, Giampaolo Cuoghi <firstname.lastname@example.org> wrote:
> Hi everybody,
> I'm using scipy for quantum mechanical computation, in particular for
> solve sparse linear system Ax=b.
> In a particular problem I haven't to solve the linear system Ax=b (with
> A=sparse matrix) but only compute the determinant of A, and compare it
> with zero.
> Is it possible, in scipy, the computation of the determinant of a sparse
> I've tried to use: linalg.det(A.todense()) but this function use a lot
> of memory.
There is no direct support for sparse determinants. Your use of the
sparse LU decomposition is probably the best approach.
Nathan Bell email@example.com
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