MA47, a Fortran code for direct solution of indefinite sparse symmetric linear systems
Iain Duff, John K. Reid · 1995
We describe the design of a new code for the solution of sparse indefinite symmetric linear systems of equations. It is intended to complement the Harwell code MA27. The principal difference between the two codes lies in the exploitation by MA47 of the additional sparsity available when the matrix has some zero diagonal entries. Other features have been included to enhance the execution speed, particularly on vector and parallel machines.