  The phase diagram of order parameters for pairing and phase coherence in
hole-doped cuprates is discussed. By examining carefully some recent inelastic
neutron scattering data obtained on hole-doped cuprates and heavy fermion
compound UPd2Al3 in which the superconductivity is mediated by spin
fluctuations, we conclude that the coherent gap in hole-doped cuprates has most
likely the magnetic origin and scales with Tc, on average, as 2Dc/kBTc = 5.4.
We discuss a model of the superconductivity in hole-doped cuprates and the
symmetries of two order parameters.
