With the methods described in the previous chapter, we can now calculate all matrix elements of the Hamiltonian H or the norm matrix N in a basis, where the radial dependence of the relative wave function of two fragments is given by rLrel exp(-вг2) for an relative orbital angular momentum Lrei. Choosing a model space and solving the generalized eigenvalue problem de­termines the eigenfunctions rv of eqs. (2.15) and (2.16). In case of a bound state calculation, these wave functions, given as an expansion in terms of Gaussians, are a variational solution. For a scattering calculation more has to be done.