petsc-3.3-p7 2013-05-11

TSComputeIJacobianConstant

 Reuses a Jacobian that is time-independent.

Synopsis

#include "petscts.h"  
PetscErrorCode TSComputeIJacobianConstant(TS ts,PetscReal t,Vec X,Vec Xdot,PetscReal shift,Mat *A,Mat *B,MatStructure *flg,void *ctx)
Collective on TS

Input Arguments

ts - time stepping context
t - time at which to evaluate
X - state at which to evaluate
Xdot - time derivative of state vector
shift - shift to apply
ctx - context

Output Arguments

A - pointer to operator
B - pointer to preconditioning matrix
flg - matrix structure flag

Notes

This function is intended to be passed to TSSetIJacobian() to evaluate the Jacobian for linear time-independent problems.

See Also

TSSetIFunction(), TSSetIJacobian(), TSComputeIFunctionLinear()

Level:intermediate
Location:src/ts/interface/ts.c
Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages