TSDiscGradSetFormulation#
Set the construction method for S, F, and grad F from the formulation \(u_t = S(u) \nabla F(u)\) for TSDISCGRAD
Synopsis#
#include "petscts.h"   
PetscErrorCode TSDiscGradSetFormulation(TS ts, PetscErrorCode (*Sfunc)(TS ts, PetscReal time, Vec u, Mat S, void *ctx), PetscErrorCode (*Ffunc)(TS ts, PetscReal time, Vec u, PetscScalar *F, void *ctx), PetscErrorCode (*Gfunc)(TS ts, PetscReal time, Vec u, Vec G, void *ctx), void *ctx)
Not Collective
Input Parameters#
- ts - timestepping context 
- Sfunc - constructor for the S matrix from the formulation 
- Ffunc - functional F from the formulation 
- Gfunc - constructor for the gradient of F from the formulation 
- ctx - optional context for the functions 
Calling sequence of Sfunc#
- ts - the integrator 
- time - the current time 
- u - the solution 
- S - the S-matrix from the formulation 
- ctx - the user context 
Calling sequence of Ffunc#
- ts - the integrator 
- time - the current time 
- u - the solution 
- F - the computed function from the formulation 
- ctx - the user context 
Calling sequence of Gfunc#
- ts - the integrator 
- time - the current time 
- u - the solution 
- G - the gradient of the computed function from the formulation 
- ctx - the user context 
See Also#
TS: Scalable ODE and DAE Solvers, TSDISCGRAD, TSDiscGradGetFormulation()
Level#
intermediate
Location#
Implementations#
Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages