We propose an effective description of the interaction between the nearest-neighboring particles in a continuum theory. The contributions of the electron-electr
A new method is used to obtain the anomalous dimension in the solution of the nonlinear diffusion equation.The result is the same as that in the renormalization
Short-time critical behavior of the random n-vector model is studied by the theoretic renormalization-group approach.Asymptotic scaling laws are studied in a fr