EPSComputeExplicitOperator

Computes the explicit operator associated to the eigenvalue problem with the specified spectral transformation.

Synopsis

#include "slepceps.h" 
int EPSComputeExplicitOperator(EPS eps,Mat *mat)
Collective on EPS

Input Parameter

eps -the eigenvalue solver context

Output Parameter

mat -the explicit operator

Notes

This routine builds a matrix containing the explicit operator. For example, in generalized problems with shift-and-invert spectral transformation the result would be matrix (A - s B)^-1 B.

This computation is done by applying the operator to columns of the identity matrix.

Currently, this routine uses a dense matrix format when 1 processor is used and a sparse format otherwise. This routine is costly in general, and is recommended for use only with relatively small systems.

See Also

STApply()

Level:advanced
Location:
src/eps/interface/itfunc.c
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages