▎ 摘　　要

The flow diagram of (sigma(xx), sigma(xy)) in a finite-frequency (omega) regime is numerically studied for a graphene quantum Hall effect system. The ac flow diagrams turn out to show qualitatively similar behavior to that of the dc flow diagrams, whereby the dynamical length scale determined by the frequency poses a relevant cutoff for the renormalization flow. The two-parameter flow then is discussed in terms of the dynamical scaling theory. We also discuss the larger-omega regime that exhibits classical flows driven by the raw frequency omega.