# QEPGetErrorEstimate

Returns the error estimate associated to the i-th computed eigenpair.

### Synopsis

    #include "slepcqep.h"
    PetscErrorCode QEPGetErrorEstimate(QEP qep,PetscInt i,PetscReal *errest)

Not Collective

### Input Parameter

| qep | - quadratic eigensolver context
| i | - index of eigenpair

### Output Parameter

errest - the error estimate

### Notes

This is the error estimate used internally by the eigensolver. The actual error bound can be computed with QEPComputeRelativeError(). See also the users manual for details.

### See Also

QEPComputeRelativeError()

Location: src/qep/interface/qepsolve.c
Index of all QEP routines
Table of Contents for all manual pages
Index of all manual pages