petsc-master 2019-07-21
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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

Notes

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

See Also

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

Level

advanced

Location

src/ts/interface/ts.c
Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages