Typical Sparse Matrix Description

  * IA - contains pointers to beginning of each row of sparse matrix.

  * JA - contains column number for each nonzero in sparse matrix.

  * A  - contains nonzero values.

Typical Description of Sparse Matrices in Cm

  * ISC --> JA (C = column)

  * ISR --> IA (R = row)

  * A

Description of Matrices

 * GKK - constraint reduced global stiffness matrix for given problem type - taken from GK by adjusting rows to account for boundary conditions.

 * GD - global damping matrix (1st order time derivatives) or domain integrals or dipole source terms.

 * GK - global stiffness mtrix (zeroth order time derivatives) - global matrix with no BCs set.

 * GM - global mass matrix (2nd order time derivatives)

 * GMM - constraint reduced global mass matrix

GQ - RHS matrix