petsc-3.7.3 2016-07-24
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# MatGetInertia

Gets the inertia from a factored matrix

### Synopsis

    #include "petscmat.h"
    PetscErrorCode MatGetInertia(Mat mat,PetscInt *nneg,PetscInt *nzero,PetscInt *npos)

Collective on Mat

### Input Parameter

mat -the matrix

### Output Parameters

| nneg | - number of negative eigenvalues
| nzero | - number of zero eigenvalues
| npos | - number of positive eigenvalues

Notes: Matrix must have been factored by MatCholeskyFactor()

Level:advanced
Location: src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages