slepc-main 2024-11-22
STMatSetUp
Build the preconditioner matrix used in STMatSolve().
Synopsis
#include "slepcst.h"
PetscErrorCode STMatSetUp(ST st,PetscScalar sigma,PetscScalar *coeffs)
Collective
Input Parameters
| st | - the spectral transformation context
|
| sigma | - the shift
|
| coeffs | - the coefficients (may be NULL)
|
Note
This function is not intended to be called by end users, but by SLEPc
solvers that use ST. It builds matrix st->P as follows, then calls KSPSetUp().
If (coeffs) st->P = Sum_{i=0..nmat-1} coeffs[i]*sigma^i*A_i
else st->P = Sum_{i=0..nmat-1} sigma^i*A_i
See Also
STMatSolve()
Level
developer
Location
src/sys/classes/st/interface/stsolve.c
Index of all ST routines
Table of Contents for all manual pages
Index of all manual pages