TSI2JacobianFn#

A prototype of a TS implicit Jacobian evaluation function for 2nd order systems that would be passed to TSSetI2Jacobian()

Synopsis#

#include <petscts.h> 
PETSC_EXTERN_TYPEDEF typedef PetscErrorCode(TSI2JacobianFn)(TS ts, PetscReal t, Vec U, Vec U_t, Vec U_tt, PetscReal v, PetscReal a, Mat J, Mat Jac, 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
U_tt - second time derivative of state vector
v - shift for U_t
a - shift for U_tt
J - Jacobian of G(U) = F(t,U,W+vU,W’+aU), equivalent to dF/dU + vdF/dU_t + adF/dU_tt
jac - matrix from which to construct the preconditioner, may be same as J
ctx - [optional] user-defined context for matrix evaluation routine

Note#

The deprecated TSI2Jacobian still works as a replacement for TSI2JacobianFn *.

Level#

advanced

Location#

include/petscts.h

Index of all TS routines
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Index of all manual pages