25 citations
4 papers
Geometric and spectral properties of directed graphs under a lower Ricci curvature bound
Ryunosuke Ozawa, Yohei Sakurai, Taiki Yamada
For undirected graphs, the Ricci curvature introduced by Lin-Lu-Yau has been widely studied from various perspectives, especially geometric analysis. In the present paper, we discu…
A construction of graphs with positive Ricci curvature
Taiki Yamada
Two complete graphs are connected by adding some edges. The obtained graph is called the gluing graph. The more we add edges, the larger the Ricci curvature on it becomes. We calcu…
The forecasting of menstruation based on a state-space modeling of basal body temperature time series
Keiichi Fukaya, Ai Kawamori, Yutaka Osada +2
Women's basal body temperature (BBT) follows a periodic pattern that is associated with the events in their menstrual cycle. Although daily BBT time series contain potentially usef…
Finite current stationary states of random walks on one-dimensional lattices with aperiodic disorder
Hiroshi Miki
Stationary states of random walks with finite induced drift velocity on one-dimensional lattices with aperiodic disorder are investigated by scaling analysis. Three aperiodic seque…