slepc-3.21.1 2024-04-26
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STFilterSetRange

Defines the numerical range (or field of values) of the matrix, that is, the interval containing all eigenvalues.

Synopsis

#include "slepcst.h" 
PetscErrorCode STFilterSetRange(ST st,PetscReal left,PetscReal right)
Logically Collective

Input Parameters

st  - the spectral transformation context
left  - left end of the interval
right  - right end of the interval

Options Database Key

-st_filter_range <a,b>  - set [a,b] as the numerical range

Notes

The filter will be most effective if the numerical range is tight, that is, left and right are good approximations to the leftmost and rightmost eigenvalues, respectively.

See Also

STFilterGetRange(), STFilterSetInterval()

Level

intermediate

Location

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

Index of all ST routines
Table of Contents for all manual pages
Index of all manual pages