slepc-3.20.1 2023-11-27
NEPSetFunction
Sets the function to compute the nonlinear Function T(lambda) as well as the location to store the matrix.
Synopsis
#include "slepcnep.h"
PetscErrorCode NEPSetFunction(NEP nep,Mat A,Mat B,PetscErrorCode (*fun)(NEP nep,PetscScalar lambda,Mat T,Mat P,void *ctx),void *ctx)
Collective
Input Parameters
| nep | - the NEP context
|
| A | - Function matrix
|
| B | - preconditioner matrix (usually same as A)
|
| fun | - Function evaluation routine (if NULL then NEP retains any
previously set value)
|
| ctx | - [optional] user-defined context for private data for the Function
evaluation routine (may be NULL) (if NULL then NEP retains any
previously set value)
|
Calling sequence of fun
PetscErrorCode fun(NEP nep,PetscScalar lambda,Mat T,Mat P,void *ctx)
| nep | - the NEP context
|
| lambda | - the scalar argument where T(.) must be evaluated
|
| T | - matrix that will contain T(lambda)
|
| P | - (optional) different matrix to build the preconditioner
|
| ctx | - (optional) user-defined context, as set by NEPSetFunction()
|
See Also
NEPGetFunction(), NEPSetJacobian()
Level
beginner
Location
src/nep/interface/nepbasic.c
Examples
src/nep/tutorials/ex20.c
src/nep/tutorials/ex20f90.F90
src/nep/tutorials/ex21.c
src/nep/tutorials/ex27.c
src/nep/tutorials/ex27f90.F90
src/nep/tutorials/ex54f90.F90
Index of all NEP routines
Table of Contents for all manual pages
Index of all manual pages