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

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Index of all TS routines
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Index of all manual pages