  A computation of the cuprate phase diagram is presented. Adiabatic
deformability back to the density function band structure is assumed. Symmetry
constraints lead to a fermi liquid theory with 5 interaction parameters. Two of
these are forced to zero by experiment. The remaining 3 are fit to (1) the
moment of the antiferromagnetic state at half filling, (2) the superconducting
gap at optimal doping, and (3) the maximum pseudogap, which I identify as
d-density wave. Solution of the Hartree-Fock equations gives, in quantitative
agreement with experiment, (1) quantum phase transitions at 5% and 16% p-type
doping, (2) insulation below 5%, (3) a d-wave pseudogap quasiparticle spectrum,
(4) pseudogap and superconducting gap values as a function of doping, (5)
superconducting Tc versus doping, (6) London penetration depth versus doping,
(7) spin wave velocity. The fit points to superexchange mediated by the bonding
O atom in the Cu-O plane as the causative agent of all three ordering
phenomena.
