HYPRE_Int HYPRE_SStructFACZeroAMRMatrixData

(HYPRE_SStructMatrix A,
  HYPRE_Int part_crse,
  HYPRE_Int rfactors[3])

(Optional, but user must make sure that they do this function otherwise) Places the identity in the coarse grid matrix underlying the fine patches.

Documentation

(Optional, but user must make sure that they do this function otherwise) Places the identity in the coarse grid matrix underlying the fine patches. Required between each pair of amr levels.

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