NORMAL FORM OF THE MULTIPLE HOPF BIFURCATIONS IN NONINTERNAL RESONANCE CASES

By a newly developed method for finding the normal form, this paper deduces the normal form for the mutiple Hopf bifurcations of a high dimensional nonlinear dynamical system in noninternal resonance cases when its Jacobian matrix has many pairs of imaginary eigenvalues, and gives the expressions of the coefficients in the normal form by those inthe original system.