Sparse Square Nonsingular Systems of Equations

For a sparse square nonsingular matrix, $A$, of order N, and an optional vector or matrix B, this routine will factor A, solve A X = B, \ A^T X = B, compute the reciprocal of the condition number, and obtain the determinant and the inverse.  This code has similar functionality to the dense codes described in Chapter 4-1.  The program in Chapter 19-6 can be used together with the code here to solve problems with the matrix given in Matrix Market format.
This software is part of the MATH77/mathc90 collection here.

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