MatColoring#

Object for managing the coloring of matrices.

Synopsis#

typedef struct _p_MatColoring *MatColoring;

Notes#

Coloring of matrices can be computed directly from the sparse matrix nonzero structure via the MatColoring object or from the mesh from which the matrix comes from via DMCreateColoring(). In general using the mesh produces a more optimal coloring (fewer colors).

Once a coloring is available MatFDColoringCreate() creates an object that can be used to efficiently compute Jacobians using that coloring. This same object can also be used to efficiently convert data created by Automatic Differentiation tools to PETSc sparse matrices.