petsc-3.14.6 2021-03-30

TSGetRHSJacobian

Returns the Jacobian J at the present timestep.

#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

- The TS context obtained from TSCreate()

	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)

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

intermediate