petsc-master 2019-07-16
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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)

Notes

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

See Also

TSGetTimeStep(), TSGetMatrices(), TSGetTime(), TSGetStepNumber()

Level

intermediate

Location

src/ts/interface/ts.c

Examples

src/ts/examples/tutorials/ex4.c.html

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