Questions tagged [umfpack]

UMFPACK is a set of routines for solving unsymmetric sparse linear systems, Ax=b, using the Unsymmetric MultiFrontal method.

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Calculating the trace of $A^+B$

For a computational representation theory program, I have to calculate the trace of $A^+B$ for a fixed $A$ and many different $B$, where $A^+$ is the pseudoinverse of $A$ ($A,B$ have full column rank ...
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How Do I solve large systems given UMFPACK memory limitations?

I am trying to solve a system of equations (A x = b) for 3D heat diffusion (i.e. each equation has at most 7 terms not including the constant "b" term) using UMFPACK with boost numeric bindings to C++....