PETSc version 3.15.5
DMTSSetI2Jacobian
set TS implicit Jacobian evaluation function for 2nd order systems 
Synopsis
#include "petscts.h" 
PetscErrorCode DMTSSetI2Jacobian(DM dm,TSI2Jacobian jac,void *ctx)
Not Collective
Input Arguments
|  | dm | - DM to be used with TS | 
|  | fun | - Jacobian evaluation routine | 
|  | ctx | - context for Jacobian evaluation | 
Calling sequence of jac
   PetscErrorCode jac(TS ts,PetscReal t,Vec U,Vec U_t,Vec U_tt,PetscReal v,PetscReal a,Mat J,Mat P,void *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 | 
|  | v | - shift for U_t | 
|  | a | - shift for U_tt | 
|  | J | - Jacobian of G(U) = F(t,U,W+v*U,W'+a*U), equivalent to dF/dU + v*dF/dU_t  + a*dF/dU_tt | 
|  | P | - preconditioning matrix for J, may be same as J | 
|  | ctx | - [optional] user-defined context for matrix evaluation routine | 
Note
TSSetI2Jacobian() is normally used, but it calls this function internally because the user context is actually
associated with the DM.
See Also
 TSSetI2Jacobian()
Level
advanced
Location
src/ts/utils/dmts.c
Index of all TS routines
Table of Contents for all manual pages
Index of all manual pages