NEPSolve#

Solves the nonlinear eigensystem.

Synopsis#

#include "slepcnep.h" 
PetscErrorCode NEPSolve(NEP nep)

Collective

Input Parameter#

nep - the nonlinear eigensolver context

Options Database Keys#

-nep_view - print information about the solver used
-nep_view_matk - view the split form matrix Ak (replace k by an integer from 0 to nt-1)
-nep_view_fnk - view the split form function fk (replace k by an integer from 0 to nt-1)
-nep_view_vectors - view the computed eigenvectors
-nep_view_values - view the computed eigenvalues
-nep_converged_reason - print reason for convergence, and number of iterations
-nep_error_absolute - print absolute errors of each eigenpair
-nep_error_relative - print relative errors of each eigenpair
-nep_error_backward - print backward errors of each eigenpair

Notes#

All the command-line options listed above admit an optional argument specifying the viewer type and options. For instance, use ‘-nep_view_vectors binary:myvecs.bin’ to save the eigenvectors to a binary file, ‘-nep_view_values draw’ to draw the computed eigenvalues graphically, or ‘-nep_error_relative :myerr.m:ascii_matlab’ to save the errors in a file that can be executed in Matlab.