slepc-3.21.1 2024-04-26
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STShellSetBackTransform

Sets the routine to be called after the eigensolution process has finished in order to transform back the computed eigenvalues.

Synopsis

#include "slepcst.h" 
PetscErrorCode STShellSetBackTransform(ST st,PetscErrorCode (*backtr)(ST st,PetscInt n,PetscScalar *eigr,PetscScalar *eigi))
Logically Collective

Input Parameters

st  - the spectral transformation context
backtr  - the application-provided backtransform routine

Calling sequence of backtr

 PetscErrorCode backtr(ST st,PetscInt n,PetscScalar *eigr,PetscScalar *eigi)
st  - the spectral transformation context
n  - number of eigenvalues to be backtransformed
eigr  - pointer ot the real parts of the eigenvalues to transform back
eigi  - pointer ot the imaginary parts

See Also

STShellSetApply(), STShellSetApplyTranspose()

Level

advanced

Location

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

Examples

src/eps/tutorials/ex10.c
src/eps/tutorials/ex10f.F90
src/eps/tutorials/ex36.c


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