TSGetI2Jacobian#

Returns the implicit Jacobian at the present timestep.

Synopsis#

#include "petscts.h"  
PetscErrorCode TSGetI2Jacobian(TS ts, Mat *J, Mat *P, TSI2Jacobian *jac, void **ctx)

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

Input Parameter#

ts - The TS context obtained from TSCreate()

Output Parameters#

J - The (approximate) Jacobian of F(t,U,U_t,U_tt)
P - The matrix from which the preconditioner is constructed, often the same as J
jac - The function to compute the Jacobian matrices
ctx - User-defined context for Jacobian evaluation routine

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(), TSSetI2Jacobian(), TSGetI2Function(), TSCreate()

Level#

advanced

Location#

src/ts/interface/ts.c

Examples#

src/ts/tutorials/ex44.c

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