NEPSetJacobian

Sets the function to compute Jacobian T'(lambda) as well as the location to store the matrix.

Synopsis

#include "slepcnep.h" 
PetscErrorCode NEPSetJacobian(NEP nep,Mat A,PetscErrorCode (*jac)(NEP,PetscScalar,Mat*,MatStructure*,void*),void *ctx)
Logically Collective on NEP and Mat

Input Parameters

nep - the NEP context
A - Jacobian matrix
jac - Jacobian evaluation routine (if NULL then NEP retains any previously set value)
ctx - [optional] user-defined context for private data for the Jacobian evaluation routine (may be NULL) (if NULL then NEP retains any previously set value)

Notes

The routine jac() takes Mat* as the matrix arguments rather than Mat. This allows the Jacobian evaluation routine to replace A with a completely new matrix structure (not just different matrix elements) when appropriate, for instance, if the nonzero structure is changing throughout the global iterations.

See Also

NEPSetFunction(), NEPGetJacobian()

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

Examples

src/nep/examples/tutorials/ex20.c.html
src/nep/examples/tutorials/ex21.c.html