slepc-3.13.0 2020-03-31
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SVDStoppingBasic

Default routine to determine whether the outer singular value solver iteration must be stopped.

Synopsis

#include "slepcsvd.h" 
PetscErrorCode SVDStoppingBasic(SVD svd,PetscInt its,PetscInt max_it,PetscInt nconv,PetscInt nsv,SVDConvergedReason *reason,void *ctx)
Collective on svd

Input Parameters

svd  - singular value solver context obtained from SVDCreate()
its  - current number of iterations
max_it  - maximum number of iterations
nconv  - number of currently converged singular triplets
nsv  - number of requested singular triplets
ctx  - context (not used here)

Output Parameter

reason  - result of the stopping test

Notes

A positive value of reason indicates that the iteration has finished successfully (converged), and a negative value indicates an error condition (diverged). If the iteration needs to be continued, reason must be set to SVD_CONVERGED_ITERATING (zero).

SVDStoppingBasic() will stop if all requested singular values are converged, or if the maximum number of iterations has been reached.

Use SVDSetStoppingTest() to provide your own test instead of using this one.

See Also

SVDSetStoppingTest(), SVDConvergedReason, SVDGetConvergedReason()

Location: src/svd/interface/svddefault.c
Index of all SVD routines
Table of Contents for all manual pages
Index of all manual pages