  To explain the high-temperature superconductivity of hole-doped copper-oxide
high-temperature superconductors (HDCO-HTSCs), Anderson proposed a theory: (A)
the pseudogap state is a resonating valence-bond (RVB) state below T* and (B)
the RVB state translates itself into high-temperature superconducting state
below Tc. In this paper we abandon Anderson theory B but still retain Anderson
theory A and add three new hypotheses. Jointed three hypotheses with Anderson
theory A, we construct an effective Hamiltonian of HDCO-HTSCs and explain why
Tc-line is a dome in phase diagram and why HDCO-HTSCs have a higher Tc than
that of conventional superconductors.
