slepc-main 2024-12-17
NEPApplyJacobian
Applies the nonlinear Jacobian T'(lambda) to a given vector.
Synopsis
#include "slepcnep.h"
PetscErrorCode NEPApplyJacobian(NEP nep,PetscScalar lambda,Vec x,Vec v,Vec y,Mat A)
Collective
Input Parameters
| nep | - the nonlinear eigensolver context
|
| lambda | - scalar argument
|
| x | - vector to be multiplied against
|
| v | - workspace vector (used only in the case of split form)
|
Output Parameters
| y | - result vector
|
| A | - (optional) Jacobian matrix, for callback interface only
|
Note
If the nonlinear operator is represented in split form, the result
y = T'(lambda)*x is computed without building T'(lambda) explicitly. In
that case, parameter A is not used. Otherwise, the matrix
T'(lambda) is built and the effect is the same as a call to
NEPComputeJacobian() followed by a MatMult().
See Also
NEPSetSplitOperator(), NEPComputeJacobian()
Level
developer
Location
src/nep/interface/nepsolve.c
Index of all NEP routines
Table of Contents for all manual pages
Index of all manual pages