MatMatSolve#

Solves A X = B, given a factored matrix.

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatMatSolve(Mat A, Mat B, Mat X)

Neighbor-wise Collective on A

Input Parameters#

  • A - the factored matrix

  • B - the right-hand-side matrix MATDENSE (or sparse MATAIJ– when using MUMPS)

Output Parameter#

  • X - the result matrix (dense matrix)

Note#

If B is a MATDENSE matrix then one can call MatMatSolve(A,B,B) except with MKL_CPARDISO; otherwise, B and X cannot be the same.

See Also#

Matrix Factorization, MatGetFactor(), MatSolve(), MatMatSolveTranspose(), MatLUFactor(), MatCholeskyFactor()

Level#

developer

Location#

src/mat/interface/matrix.c

Examples#

src/ksp/ksp/tutorials/ex74.c.html
src/ksp/ksp/tutorials/ex77.c.html
src/ksp/ksp/tutorials/ex77f.F90.html

Implementations#

MatMatSolve_MUMPS in src/mat/impls/aij/mpi/mumps/mumps.c
MatMatSolve_STRUMPACK in src/mat/impls/aij/mpi/strumpack/strumpack.c
MatMatSolve_SeqAIJ in src/mat/impls/aij/seq/aijfact.c
MatMatSolve_SPQR in src/mat/impls/aij/seq/spqr/aijspqr.c
MatMatSolve_SuperLU in src/mat/impls/aij/seq/superlu/superlu.c
MatMatSolve_Elemental in src/mat/impls/elemental/matelem.cxx
MatMatSolve_CHOLMOD in src/mat/impls/sbaij/seq/cholmod/sbaijcholmod.c
MatMatSolve_ScaLAPACK in src/mat/impls/scalapack/matscalapack.c


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