slepc3.21.1 20240426
EPSPowerSetNonlinear
Sets a flag to indicate that the problem is nonlinear.
Synopsis
#include "slepceps.h"
PetscErrorCode EPSPowerSetNonlinear(EPS eps,PetscBool nonlinear)
Logically Collective
Input Parameters
 eps   the eigenproblem solver context

 nonlinear   whether the problem is nonlinear or not

Options Database Key
 eps_power_nonlinear   Sets the nonlinear flag

Notes
If this flag is set, the solver assumes that the problem is nonlinear,
that is, the operators that define the eigenproblem are not constant
matrices, but depend on the eigenvector, A(x)*x=lambda*B(x)*x. This is
different from the case of nonlinearity with respect to the eigenvalue
(use the NEP solver class for this kind of problems).
The way in which nonlinear operators are specified is very similar to
the case of PETSc's SNES solver. The difference is that the callback
functions are provided via composed functions "formFunction" and
"formJacobian" in each of the matrix objects passed as arguments of
EPSSetOperators(). The application context required for these functions
can be attached via a composed PetscContainer.
See Also
EPSPowerGetNonlinear(), EPSSetOperators()
Level
advanced
Location
src/eps/impls/power/power.c
Examples
src/eps/tutorials/ex34.c
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages