SVDComputeRelativeError
Computes the relative error bound associated with the i-th singular triplet.
Synopsis
#include "slepcsvd.h"
PetscErrorCode SVDComputeRelativeError(SVD svd,PetscInt i,PetscReal *error)
Collective on SVD
Input Parameter
| svd | - the singular value solver context
|
| i | - the solution index
|
Output Parameter
error - the relative error bound, computed as sqrt(n1^2+n2^2)/sigma
where n1 = ||A*v-sigma*u||_2 , n2 = ||A^T*u-sigma*v||_2 , sigma is the singular value,
u and v are the left and right singular vectors.
If sigma is too small the relative error is computed as sqrt(n1^2+n2^2).
See Also
SVDSolve(), SVDComputeResidualNorms()
Location: src/svd/interface/svdsolve.c
Index of all SVD routines
Table of Contents for all manual pages
Index of all manual pages