3 papers
nlin.CD2002
Relaxation and Diffusion in a Globally Coupled Hamiltonian System
Yamaguchi Y. Yoshiyuki
The relation between relaxation and diffusion is investigated in a Hamiltonian system of globally coupled rotators. Diffusion is anomalous if and only if the system is going toward…
nlin.CD2001
New renormalization procedure for perturbed ordinally differential equations with given initial condition and prescribed secular terms
Yoshiyuki Y. Yamaguchi
For perturbed ordinally differential equations, a procedure of renormalization group method is proposed. To uniquely obtain renormalized solutions for given initial conditions, the…
chao-dyn1999
Renormalization group method and canonical perturbation theory
Yoshiyuki Y. Yamaguchi, Yasusada Nambu
Renormalization group method is one of the most powerful tool to obtain approximate solutions to differential equations. We apply the renormalization group method to Hamiltonian sy…