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 \(\operatorname{span}(V)\), where \(V\) is an orthonormal basis built internally by the solver. The projected operator is equal to \(\sum_i V^* A_i V f_i(\lambda)\), so this function computes all matrices \(E_i = V^* A_i V\), and stores them in the extra matrices inside DS, see DSMatType. 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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