petsc-3.11.3 2019-06-26
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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 on TS and Vec

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 + shiftV*dF/dV + shiftA*dF/dA

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

Keywords

TS, compute, Jacobian, matrix

See Also

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