slepc-3.22.2 2024-12-02
EPSPowerSetShiftType
Sets the type of shifts used during the power iteration. This can be used to emulate the Rayleigh Quotient Iteration (RQI) method.
Synopsis
#include "slepceps.h"
PetscErrorCode EPSPowerSetShiftType(EPS eps,EPSPowerShiftType shift)
Logically Collective
Input Parameters
| eps | - the eigenproblem solver context
|
| shift | - the type of shift
|
Options Database Key
| -eps_power_shift_type | - Sets the shift type (either 'constant' or
'rayleigh' or 'wilkinson')
|
Notes
By default, shifts are constant (EPS_POWER_SHIFT_CONSTANT) and the iteration
is the simple power method (or inverse iteration if a shift-and-invert
transformation is being used).
A variable shift can be specified (EPS_POWER_SHIFT_RAYLEIGH or
EPS_POWER_SHIFT_WILKINSON). In this case, the iteration behaves rather like
a cubic converging method such as RQI.
See Also
EPSPowerGetShiftType(), STSetShift(), EPSPowerShiftType
Level
advanced
Location
src/eps/impls/power/power.c
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages