TSGetRHSJacobian#

Returns the Jacobian J at the present timestep.

Synopsis#

#include "petscts.h"  
PetscErrorCode TSGetRHSJacobian(TS ts, Mat *Amat, Mat *Pmat, TSRHSJacobian *func, void **ctx)

Not Collective, but parallel objects are returned if ts is parallel

Input Parameter#

ts - The TS context obtained from TSCreate()

Output Parameters#

Amat - The (approximate) Jacobian J of G, where U_t = G(U,t) (or NULL)
Pmat - The matrix from which the preconditioner is constructed, usually the same as Amat (or NULL)
func - Function to compute the Jacobian of the RHS (or NULL)
ctx - User-defined context for Jacobian evaluation routine (or NULL)

Note#

You can pass in NULL for any return argument you do not need.

See Also#

TS: Scalable ODE and DAE Solvers, TS, TSGetTimeStep(), TSGetMatrices(), TSGetTime(), TSGetStepNumber()

Level#

intermediate

Location#

src/ts/interface/ts.c

Examples#

src/ts/tutorials/ex4.c

Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages