slepc-3.17.1 2022-04-11
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Applies the nonlinear Jacobian T'(lambda) to a given vector.


#include "slepcnep.h" 
PetscErrorCode NEPApplyJacobian(NEP nep,PetscScalar lambda,Vec x,Vec v,Vec y,Mat A)
Collective on nep

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


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()

Location: src/nep/interface/nepsolve.c
Index of all NEP routines
Table of Contents for all manual pages
Index of all manual pages