On Tue, 16 Aug 2011, Johannes Huber wrote:
> When refining a mesh hanging nodes are handelt in the DofMap using constraint
> matricees. Since I need derivatives w. r. t. the parameter function I need
> access to the constraint matrix of an element. Is there a way of accessing
> this matrix or if
Hi,
I'm using libMesh for distributed parameter identification, so my system
matrix depends on a function (that might even life on another mesh). When
solving the optimization problem, I need derivatives (Jacobian and hessian)
not only w. r. t. PDE solution but also w. r. t. the parameter functi
