TSComputeI2Jacobian#

Evaluates the Jacobian of the DAE

Synopsis#

#include "petscts.h"  
PetscErrorCode TSComputeI2Jacobian(TS ts, PetscReal t, Vec U, Vec V, Vec A, PetscReal shiftV, PetscReal shiftA, Mat J, Mat P)

Collective

Input Parameters#

  • ts - the TS context

  • t - current timestep

  • U - state vector

  • V - time derivative of state vector

  • A - second time derivative of state vector

  • shiftV - shift to apply, see note below

  • shiftA - shift to apply, see note below

Output Parameters#

  • J - Jacobian matrix

  • P - optional preconditioning matrix

Notes#

If F(t,U,V,A)=0 is the DAE, the required Jacobian is

dF/dU + shiftVdF/dV + shiftAdF/dA

Most users should not need to explicitly call this routine, as it is used internally within the nonlinear solvers.

See Also#

TS: Scalable ODE and DAE Solvers, TS, TSSetI2Jacobian()

Level#

developer

Location#

src/ts/interface/ts.c

Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages