STSetShift

Sets the shift associated with the spectral transformation.

Synopsis

#include "slepcst.h" 
PetscErrorCode STSetShift(ST st,PetscScalar shift)

Collective

Input Parameters

• st - the spectral transformation context

• shift - the value of the shift

Notes

In some spectral transformations, changing the shift may have associated a lot of work, for example recomputing a factorization.

This function is normally not directly called by users, since the shift is indirectly set by EPSSetTarget().

See Also

ST: Spectral Transformation, EPSSetTarget(), STGetShift(), STSetDefaultShift()

Level

intermediate

Location

src/sys/classes/st/interface/stfunc.c

Examples

src/sys/classes/st/tests/test1.c
src/sys/classes/st/tests/test2.c
src/sys/classes/st/tests/test3.c
src/sys/classes/st/tests/test4.c
src/sys/classes/st/tests/test5.c
src/sys/classes/st/tests/test6.c
src/sys/classes/st/tests/test7.c
src/sys/classes/st/tests/test8.c
src/sys/classes/st/tests/test9.c
src/eps/tests/test11.c

Implementations

STSetShift_Cayley() in src/sys/classes/st/impls/cayley/cayley.c
STSetShift_Precond() in src/sys/classes/st/impls/precond/precond.c
STSetShift_Shift() in src/sys/classes/st/impls/shift/shift.c
STSetShift_Sinvert() in src/sys/classes/st/impls/sinvert/sinvert.c

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