petsc-3.8.4 2018-03-24

TSComputeI2Function

Evaluates the DAE residual written in implicit form F(t,U,U_t,U_tt) = 0

#include "petscts.h"  
PetscErrorCode TSComputeI2Function(TS ts,PetscReal t,Vec U,Vec V,Vec A,Vec F)

Collective on TS and Vec

	ts	- the TS context
	t	- current time
	U	- state vector
	V	- time derivative of state vector (U_t)
	A	- second time derivative of state vector (U_tt)

F -the residual vector

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

TS, compute, function, vector