petsc-3.5.4 2015-05-23
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Returns the implicit Jacobian at the present timestep.


#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

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

See Also

TSGetTimeStep(), TSGetRHSJacobian(), TSGetMatrices(), TSGetTime(), TSGetTimeStepNumber()


TS, timestep, get, matrix, Jacobian

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