Any example of assembling a Jacobian matrix of DMComposite object?

[Barry Smith]

On Jul 25, 2009, at 4:06 PM, (Rebecca) Xuefei YUAN wrote:

> Hi,
>
> I have an optimization problem in 2d with some scalar parameter,  
> thus DMComposite is used to manage the date structure. If I am going  
> to write down the Jacobian matrix for the system, I come up with  
> (mx*my+1,mx*my+1) matrix. Is there any example in PETSc of  
> assembling the Jacobian for optimization problem?

    No

>
> Thanks very much!
>
> -- 
> (Rebecca) Xuefei YUAN
> Department of Applied Physics and Applied Mathematics
> Columbia University
> Tel:917-399-8032
> www.columbia.edu/~xy2102
>