slepc-3.20.1 2023-11-27
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Sets a function to compute the error estimate used in the convergence test.


#include "slepcpep.h" 
PetscErrorCode PEPSetConvergenceTestFunction(PEP pep,PetscErrorCode (*conv)(PEP pep,PetscScalar eigr,PetscScalar eigi,PetscReal res,PetscReal *errest,void *ctx),void* ctx,PetscErrorCode (*destroy)(void*))
Logically Collective

Input Parameters

pep  - eigensolver context obtained from PEPCreate()
conv  - a pointer to the convergence test function
ctx  - context for private data for the convergence routine (may be null)
destroy  - a routine for destroying the context (may be null)

Calling sequence of conv

 PetscErrorCode conv(PEP pep,PetscScalar eigr,PetscScalar eigi,PetscReal res,PetscReal *errest,void *ctx)
pep  - eigensolver context obtained from PEPCreate()
eigr  - real part of the eigenvalue
eigi  - imaginary part of the eigenvalue
res  - residual norm associated to the eigenpair
errest  - (output) computed error estimate
ctx  - optional context, as set by PEPSetConvergenceTestFunction()


If the error estimate returned by the convergence test function is less than the tolerance, then the eigenvalue is accepted as converged.

See Also

PEPSetConvergenceTest(), PEPSetTolerances()





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