Wave functions of relativistic bound systems

Invariant wave finctions arising on consideration of a vector state defined on the surface of a light front are introduced for describing relativistic bound systems. The chief difference between their parametrization and the relativistic parametrization can be interpreted as the deviation, even in a S-wave, from spherical symmetry at short distances. The diagram technique for a light cone is considered. The wave functions are related to the vortex parts of the diagram technique. The technique developed is required for finding the high momentum components of the nuclear wave functions in relativistic nuclear reaction theory and in composite models of elementary particles