petsc-3.7.3 2016-07-24
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# 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/tao/matrix/adamat.c
Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages