Abstract

Fortran IV subroutines for the in-core solution of linear algebraic systems with a sparse, symmetrically skylined-stored nonsymmetric coefficient matrix are presented. Such systems arise in various computations, among which are the finite element discretization in conjunction with incremental continuum mechanics, or space-time finite elements for dynamical systems. These routines can be used for constrained systems without prearranging. The feature of partial decomposition is installed and its application to the analysis of singular matrices is discussed.

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