petsc-master 2019-11-11
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Creates the (i,j) structure of the matrix product C = P^T * A * P


#include "petscmat.h" 
PetscErrorCode MatPtAPSymbolic(Mat A,Mat P,PetscReal fill,Mat *C)
Neighbor-wise Collective on Mat

Input Parameters

A - the matrix
P - the projection matrix

Output Parameters

C -the (i,j) structure of the product matrix


C will be created and must be destroyed by the user with MatDestroy().

This routine is currently only implemented for pairs of SeqAIJ matrices and classes which inherit from SeqAIJ. C will be of type MATSEQAIJ. The product is computed using this (i,j) structure by calling MatPtAPNumeric().

See Also

MatPtAP(), MatPtAPNumeric(), MatMatMultSymbolic()






MatPtAPSymbolic_MPIAIJ_MPIAIJ_scalable in src/mat/impls/aij/mpi/mpiptap.c
MatPtAPSymbolic_MPIAIJ_MPIXAIJ_allatonce in src/mat/impls/aij/mpi/mpiptap.c
MatPtAPSymbolic_MPIAIJ_MPIAIJ_allatonce in src/mat/impls/aij/mpi/mpiptap.c
MatPtAPSymbolic_MPIAIJ_MPIXAIJ_allatonce_merged in src/mat/impls/aij/mpi/mpiptap.c
MatPtAPSymbolic_MPIAIJ_MPIAIJ_allatonce_merged in src/mat/impls/aij/mpi/mpiptap.c
MatPtAPSymbolic_MPIAIJ_MPIAIJ in src/mat/impls/aij/mpi/mpiptap.c
MatPtAPSymbolic_SeqAIJ_SeqAIJ_SparseAxpy in src/mat/impls/aij/seq/matptap.c
MatPtAPSymbolic_SeqDense_SeqDense in src/mat/impls/dense/seq/dense.c
MatPtAPSymbolic_AIJ_AIJ_wHYPRE in src/mat/impls/hypre/mhypre.c
MatPtAPSymbolic_IS_XAIJ in src/mat/impls/is/matis.c
MatPtAPSymbolic_SeqAIJ_SeqMAIJ in src/mat/impls/maij/maij.c
MatPtAPSymbolic_MPIAIJ_MPIMAIJ in src/mat/impls/maij/maij.c
MatPtAPSymbolic_MPIAIJ_MPIMAIJ_allatonce in src/mat/impls/maij/maij.c
MatPtAPSymbolic_MPIAIJ_MPIMAIJ_allatonce_merged in src/mat/impls/maij/maij.c

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Index of all manual pages