PETSc version 3.15.5
TSSetI2Function
Set the function to compute F(t,U,U_t,U_tt) where F = 0 is the DAE to be solved. 
Synopsis
#include "petscts.h"  
PetscErrorCode TSSetI2Function(TS ts,Vec F,TSI2Function fun,void *ctx)
Logically Collective on TS
Input Parameters
|  | ts | - the TS context obtained from TSCreate() | 
|  | F | - vector to hold the residual (or NULL to have it created internally) | 
|  | fun | - the function evaluation routine | 
|  | ctx | - user-defined context for private data for the function evaluation routine (may be NULL) | 
Calling sequence of fun
    PetscErrorCode fun(TS ts,PetscReal t,Vec U,Vec U_t,Vec U_tt,Vec F,ctx);
|  | t | - time at step/stage being solved | 
|  | U | - state vector | 
|  | U_t | - time derivative of state vector | 
|  | U_tt | - second time derivative of state vector | 
|  | F | - function vector | 
|  | ctx | - [optional] user-defined context for matrix evaluation routine (may be NULL) | 
See Also
 TSSetI2Jacobian(), TSSetIFunction(), TSCreate(), TSSetRHSFunction()
Level
beginner
Location
src/ts/interface/ts.c
Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages