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# SNESTSFormJacobian

Function to evaluate the Jacobian defined by an ODE solver algorithm implemented within `TS`

## Synopsis

    #include "petscts.h"
    PetscErrorCode SNESTSFormJacobian(SNES snes, Vec U, Mat A, Mat B, PetscCtx ctx)

Collective

## Input Parameters

- snes - nonlinear solver

- U - the current state at which to evaluate the residual

- ctx - user context, must be a `TS`

## Output Parameters

- A - the Jacobian

- B - the matrix used to construct the preconditioner (often the same as `A`)

## Note

This function is not normally called by users and is automatically registered with the `SNES` used by `TS`.

## See Also

TS: Scalable ODE and DAE Solvers, `SNESSetJacobian()`

## Level

developer

## Location

src/ts/interface/ts.c

## Implementations

SNESTSFormJacobian_ARKIMEX() in src/ts/impls/arkimex/arkimex.c
SNESTSFormJacobian_BDF() in src/ts/impls/bdf/bdf.c
SNESTSFormJacobian_EIMEX() in src/ts/impls/eimex/eimex.c
SNESTSFormJacobian_RK() in src/ts/impls/explicit/rk/rk.c
SNESTSFormJacobian_GLEE() in src/ts/impls/glee/glee.c
SNESTSFormJacobian_Alpha() in src/ts/impls/implicit/alpha/alpha1.c
SNESTSFormJacobian_Alpha() in src/ts/impls/implicit/alpha/alpha2.c
SNESTSFormJacobian_DiscGrad() in src/ts/impls/implicit/discgrad/tsdiscgrad.c
SNESTSFormJacobian_GLLE() in src/ts/impls/implicit/glle/glle.c
SNESTSFormJacobian_IRK() in src/ts/impls/implicit/irk/irk.c
SNESTSFormJacobian_Theta() in src/ts/impls/implicit/theta/theta.c
SNESTSFormJacobian_Mimex() in src/ts/impls/mimex/mimex.c
SNESTSFormJacobian_Pseudo() in src/ts/impls/pseudo/posindep.c
SNESTSFormJacobian_RosW() in src/ts/impls/rosw/rosw.c

Index of all TS routines
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Index of all manual pages