NEPProjectOperator#

Computes the projection of the nonlinear operator.

Synopsis#

#include "slepcnep.h" 
PetscErrorCode NEPProjectOperator(NEP nep,PetscInt j0,PetscInt j1)

Collective

Input Parameters#

  • nep - the nonlinear eigensolver context

  • j0 - initial index

  • j1 - final index

Notes#

This is available for split operator only.

The nonlinear operator T(lambda) is projected onto span(V), where V is an orthonormal basis built internally by the solver. The projected operator is equal to sum_i V’A_iV*f_i(lambda), so this function computes all matrices Ei = V’A_iV, and stores them in the extra matrices inside DS. Only rows/columns in the range [j0,j1-1] are computed, the previous ones are assumed to be available already.

See Also#

NEP: Nonlinear Eigenvalue Problems, NEPSetSplitOperator()

Level#

developer

Location#

src/nep/interface/nepsolve.c

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