petsc3.13.6 20200929
TSComputeIFunction
Evaluates the DAE residual written in implicit form F(t,U,Udot)=0
Synopsis
#include "petscts.h"
PetscErrorCode TSComputeIFunction(TS ts,PetscReal t,Vec U,Vec Udot,Vec Y,PetscBool imex)
Collective on TS
Input Parameters
 ts   the TS context

 t   current time

 U   state vector

 Udot   time derivative of state vector

 imex   flag indicates if the method is IMEX so that the RHSFunction should be kept separate

Output Parameter
Y right hand side
Note
Most users should not need to explicitly call this routine, as it
is used internally within the nonlinear solvers.
If the user did did not write their equations in implicit form, this
function recasts them in implicit form.
See Also
TSSetIFunction(), TSComputeRHSFunction()
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