TSIJacobianFn#

A prototype of a TS Jacobian evaluation function that would be passed to TSSetIJacobian()

Synopsis#

#include <petscts.h> 
PETSC_EXTERN_TYPEDEF typedef PetscErrorCode(TSIJacobianFn)(TS ts, PetscReal t, Vec U, Vec U_t, PetscReal a, Mat Amat, Mat Pmat, void *ctx);

Calling Sequence#

  • ts - the TS context obtained from TSCreate()

  • t - time at step/stage being solved

  • U - state vector

  • U_t - time derivative of state vector

  • a - shift

  • Amat - (approximate) Jacobian of F(t,U,W+aU), equivalent to dF/dU + adF/dU_t

  • Pmat - matrix used for constructing preconditioner, usually the same as Amat

  • ctx - [optional] user-defined context for Jacobian evaluation routine

Note#

The deprecated TSIJacobian still works as a replacement for TSIJacobianFn *.

See Also#

TS: Scalable ODE and DAE Solvers, TSSetIJacobian(), DMTSSetIJacobian(), TSIFunctionFn, TSRHSFunctionFn, TSRHSJacobianFn

Level#

beginner

Location#

include/petscts.h

Examples#

src/ts/tutorials/ex8.c

Index of all TS routines
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Index of all manual pages