MatMultDiagonalBlock#

Computes the matrix-vector product, y = Dx. Where D is defined by the inode or block structure of the diagonal

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatMultDiagonalBlock(Mat mat, Vec x, Vec y)

Collective

Input Parameters#

  • mat - the matrix

  • x - the vector to be multiplied

Output Parameter#

  • y - the result

Note#

The vectors x and y cannot be the same. I.e., one cannot call MatMultDiagonalBlock(A,y,y).

See Also#

Matrices, Mat, MatMult(), MatMultTranspose(), MatMultAdd(), MatMultTransposeAdd()

Level#

developer

Location#

src/mat/interface/matrix.c

Implementations#

MatMultDiagonalBlock_MPIAIJ in src/mat/impls/aij/mpi/mpiaij.c
MatMultDiagonalBlock_MPISELL in src/mat/impls/sell/mpi/mpisell.c


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