MatMatRestrict#

Y = A*X or A’*X

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatMatRestrict(Mat A, Mat x, Mat *y)

Neighbor-wise Collective on Mat

Input Parameters#

  • mat - the matrix

  • x - the input dense matrix

Output Parameters#

  • y - the output dense matrix

Note#

This allows one to use either the restriction or interpolation (its transpose) matrix to do the restriction. y matrix can be reused if already created with the proper sizes, otherwise it will be recreated. y must be initialized to NULL if not supplied.

See Also#

MatRestrict(), MatInterpolate(), MatMatInterpolate(), PCMG

Level#

intermediate

Location#

src/mat/interface/matrix.c


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