TSGetIJacobian

Returns the implicit Jacobian at the present timestep.

Synopsis

#include "petscts.h"  
PetscErrorCode TSGetIJacobian(TS ts, Mat *Amat, Mat *Pmat, TSIJacobian *f, 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 of F(t,U,U_t)

• Pmat - The matrix from which the preconditioner is constructed, often the same as Amat

• f - The function to compute the 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(), TSGetRHSJacobian(), TSGetMatrices(), TSGetTime(), TSGetStepNumber()

Level

advanced

Location

src/ts/interface/ts.c

Examples

src/ts/tutorials/ex53.c

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