NEPComputeError#

Computes the error (based on the residual norm) associated with the i-th computed eigenpair.

Synopsis#

#include "slepcnep.h" 
PetscErrorCode NEPComputeError(NEP nep,PetscInt i,NEPErrorType type,PetscReal *error)

Collective

Input Parameters#

  • nep - the nonlinear eigensolver context

  • i - the solution index

  • type - the type of error to compute

Output Parameter#

  • error - the error

Notes#

The error can be computed in various ways, all of them based on the residual norm computed as ||T(lambda)x||_2 where lambda is the eigenvalue and x is the eigenvector.

See Also#

NEP: Nonlinear Eigenvalue Problems, NEPErrorType, NEPSolve(), NEPGetErrorEstimate()

Level#

beginner

Location#

src/nep/interface/nepsolve.c

Examples#

src/nep/tutorials/ex20.c
src/nep/tutorials/ex20f.F90

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