MatSchurComplementAinvType

Determines how to approximate the inverse of the (0,0) block in Schur complement matrix assembly routines

Synopsis

typedef enum {
  MAT_SCHUR_COMPLEMENT_AINV_DIAG,
  MAT_SCHUR_COMPLEMENT_AINV_LUMP,
  MAT_SCHUR_COMPLEMENT_AINV_BLOCK_DIAG,
  MAT_SCHUR_COMPLEMENT_AINV_FULL
} MatSchurComplementAinvType;

Values

• MAT_SCHUR_COMPLEMENT_AINV_DIAG - invert the diagonal of A00

• MAT_SCHUR_COMPLEMENT_AINV_LUMP - invert the diagonal matrix containing the row sums of A00 (mass lumping)

• MAT_SCHUR_COMPLEMENT_AINV_BLOCK_DIAG - invert the block diagonal of the matrix, where the blocks are determined by the block size of the matrix

• MAT_SCHUR_COMPLEMENT_AINV_FULL - invert the full matrix A00

Note

In the documentation this inverse type is indicated with \(inv(DIAGFORM(A00))\).

See Also

MatSchurComplementGetAinvType(), MatSchurComplementSetAinvType(), MatSchurComplementGetPmat(), MatGetSchurComplement(), MatCreateSchurComplementPmat(), MatCreateSchurComplement()

Level

intermediate

Location

include/petscksp.h

Examples

src/ksp/ksp/tests/ex21.c

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