[SciPy-user] determinant of a sparse matrix
Andy Fraser
afraser@lanl....
Mon Dec 22 10:06:08 CST 2008
>>>>> "GC" == Giampaolo Cuoghi <jpaul74@gmail.com> writes:
GC> In a particular problem I haven't to solve the linear system
GC> Ax=b (with A=sparse matrix) but only compute the determinant
GC> of A, and compare it with zero.
GC> Is it possible, in scipy, the computation of the determinant
GC> of a sparse matrix?
I use scipy.sparse.linalg.lobpcg to find the smallest eigenvalue of a
sparse matrix. If you only want to know if your determinant is
different from zero, and you know something about the eigenvalues
(for example they are real and not negative) you might be able to get
what you want out of lobpcg.
Andy
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