The used finite element mesh has to use elements of order two. The source code reads the FEM mesh from a data set, solves the given functional equation and writes specified sets of components of the solution and the condensed error indicator to data sets using a selected output format.
Spaces are insignificant.
Additionally for every component the nodes of the mesh are specified where the Dirichlet condition has to be satisfied. The mesh must only use elements of order two. If you use only a few nodes to specify the Dirichlet conditions, you should ensure that there are enough points which are vertices of elements in the mesh. The prevalue parameter in the definition of the Dirichlet condition of component d is set to the value of the x-displacement. The prevalue parameter in the definition of the Dirichlet condition of component d is set to the value of the x-displacement.