petsc-3.15.0 2021-03-30
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MatIsSymmetric

Test whether a matrix is symmetric

Synopsis

#include "petscmat.h" 
PetscErrorCode MatIsSymmetric(Mat A,PetscReal tol,PetscBool  *flg)
Collective on Mat

Input Parameter

A - the matrix to test
tol - difference between value and its transpose less than this amount counts as equal (use 0.0 for exact transpose)

Output Parameters

flg - the result

Notes

For real numbers MatIsSymmetric() and MatIsHermitian() return identical results

See Also

MatTranspose(), MatIsTranspose(), MatIsHermitian(), MatIsStructurallySymmetric(), MatSetOption(), MatIsSymmetricKnown()

Level

intermediate

Location

src/mat/interface/matrix.c

Examples

src/ksp/ksp/tutorials/ex72.c.html

Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages