PETSc version 3.16.5
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# PetscDSHasJacobian

Signals that Jacobian functions have been set

### Synopsis

    #include "petscds.h"
    PetscErrorCode PetscDSHasJacobian(PetscDS ds, PetscBool *hasJac)

Not collective

### Input Parameter

| prob | - The PetscDS

### Output Parameter

| hasJac | - flag that pointwise function for the Jacobian has been set

### See Also

PetscDSGetJacobianPreconditioner(), PetscDSSetJacobianPreconditioner(), PetscDSGetJacobian()

### Level

intermediate

### Location

src/dm/dt/interface/dtds.c
Index of all DT routines
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Index of all manual pages