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
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Index of all manual pages