DMTSSetRHSJacobian#

set TS Jacobian evaluation function

Synopsis#

#include "petscts.h" 
PetscErrorCode DMTSSetRHSJacobian(DM dm, TSRHSJacobian func, void *ctx)

Not Collective

Input Parameters#

dm - DM to be used with TS
func - Jacobian evaluation routine
ctx - context for residual evaluation

Calling sequence of `func`#

PetscErrorCode func(TS ts, PetscReal t, Vec u, Mat A, Mat B, void *ctx);

ts - the TS context obtained from TSCreate()
t - current timestep
u - input vector
Amat - (approximate) Jacobian matrix
Pmat - matrix from which preconditioner is to be constructed (usually the same as Amat)
ctx - [optional] user-defined context for matrix evaluation routine

Note#

TSSetJacobian() is normally used, but it calls this function internally because the user context is actually associated with the DM. This makes the interface consistent regardless of whether the user interacts with a DM or not.