Abstract
A theory is proposed with the aim of describing large amplitude collective motion and its coupling with intrinsic degrees of freedom. A canonical transformation is investigated in the full time-dependent Hartree-Fock theory, i.e., in the classical image of boson expansion theory. With the aid of the transformation, the whole system is separated into collective and intrinsic degrees of freedom. Under the condition of the unique separation, two types of equations of collective submanifold, which are canonically invariant, are obtained. One is of the same form as that of the conventional equation of collective submanifold. A principle of the specification of coordinate system is discussed.
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