slepc-3.17.1 2022-04-11

STSetShift

Sets the shift associated with the spectral transformation.

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

Logically Collective on st

	st	- the spectral transformation context
	shift	- the value of the shift

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().