STFilterGetThreshold#

Gets the threshold value \(\gamma\) used to decide whether eigenvalue approximations are inside or outside the wanted interval.

Synopsis#

#include "slepcst.h" 
PetscErrorCode STFilterGetThreshold(ST st,PetscReal *gamma)

Not Collective

Input Parameter#

  • st - the spectral transformation context

Output Parameter#

  • gamma - the threshold value

Note#

An eigenvalue \(\lambda\) is considered to be inside the wanted interval if \(|p(\lambda)|\geq\gamma\), and outside otherwise.

See Also#

ST: Spectral Transformation, STFILTER, STFilterGetRange()

Level#

developer

Location#

src/sys/classes/st/impls/filter/filter.c

Implementations#

STFilterGetThreshold_Filter() in src/sys/classes/st/impls/filter/filter.c


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