tao2.1p0 20120724
MatCreateADA
Creates a matrix M=A^T D1 A + D2 where D1, D2 are diagonal
Synopsis
#include "mat.h"
PetscErrorCode MatCreateADA(Mat mat,Vec d1, Vec d2, Mat *J)
Collective on matrix
Input Parameters
 mat   matrix of arbitrary type

 d1   A vector with diagonal elements of D1

 d2   A vector

Output Parameters
J New matrix whose operations are defined in terms of mat, D1, and D2.
Notes
The user provides the input data and is responsible for destroying
this data after matrix J has been destroyed.
The operation MatMult(A,D2,D1) must be well defined.
Before calling the operation MatGetDiagonal(), the function
MatADAComputeDiagonal() must be called. The matrices A and D1 must
be the same during calls to MatADAComputeDiagonal() and
MatGetDiagonal().
See Also
MatCreate()
Level:developer
Location:src/matrix/adamat.c
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