  We follow our general model in Ref. [3] and analyze the formation of
retinotopic projections for the biologically relevant situation of spherical
geometries. To this end we elaborate both a linear and a nonlinear synergetic
analysis which results in order parameter equations for the dynamics of
connection weights between two spherical cell sheets. We show that these
equations of evolution provide stable stationary solutions which correspond to
retinotopic modes. A further analysis of higher modes furnishes proof that our
model describes the emergence of a perfect one-to-one retinotopy between two
spheres.
