  The problem of the symmetry of the superconducting pairing and the form of
the gap function in the electron-doped superconductors is reconsidered within
the temperature-cutoff functional renormalization group approach combined with
the Bethe-Salpeter equations. The momentum dependence of the order parameter
for antiferromagnetic and superconducting instabilities in these compounds is
analyzed. The gap function in the antiferromagnetic (particle-hole) channel has
its maxima at the hot-spots, or at the diagonal of the Brilloin zone in their
absence. The wavefunction in the singlet superconducting channel is
non-monotonic in the vicinity of the (pi,0) and (0,pi) points, in striking
similarity with recent experimental data. An instability in the triplet
superconducting channel is much weaker than the singlet one and has an f-wave
like form of the gap function.
