TSSetIFunction

Set the function to compute F(t,U,U_t) where F() = 0 is the DAE to be solved.

Synopsis

#include "petscts.h"  
PetscErrorCode TSSetIFunction(TS ts, Vec r, TSIFunctionFn *f, void *ctx)

Logically Collective

Input Parameters

• ts - the TS context obtained from TSCreate()

• r - vector to hold the residual (or NULL to have it created internally)

• f - the function evaluation routine

• ctx - user-defined context for private data for the function evaluation routine (may be NULL)

Note

The user MUST call either this routine or TSSetRHSFunction() to define the ODE. When solving DAEs you must use this function.

See Also

TS: Scalable ODE and DAE Solvers, TS, TSIFunctionFn, TSSetRHSJacobian(), TSSetRHSFunction(), TSSetIJacobian()

Level

beginner

Location

src/ts/interface/ts.c

Examples

src/ts/tutorials/ex36.c
src/ts/tutorials/ex24.c
src/ts/tutorials/ex20adj.c
src/ts/tutorials/ex20.c
src/ts/tutorials/ex31.c
src/ts/tutorials/ex20fwd.c
src/ts/tutorials/ex32.c
src/ts/utils/dmplexlandau/tutorials/ex2.c
src/ts/utils/dmplexlandau/tutorials/ex1f90.F90
src/ts/utils/dmplexlandau/tutorials/ex1.c

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Index of all TS routines
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Index of all manual pages