J. Cho

collaborators

2 papers

math.CO2015

T-partition systems and travel groupoids on a graph

Jung Rae Cho, Jeongmi Park, Yoshio Sano

The notion of travel groupoids was introduced by L. Nebeský in 2006 in connection with a study on geodetic graphs. A travel groupoid is a pair of a set $V$ and a binary operation $…

math.CO2012

On $p$ -schemes of order $p^{3}$

Jung Rae Cho, Mitsugu Hirasaka, Kijung Kim

Let $(X, S)$ be a $p$ -scheme of order $p^{3}$ and $T$ the thin residue of $S$ . Now we assume that $T$ has valency $p^{2}$ . It is easy to see that one of the following holds: (i) $|T|=p^…

T-partition systems and travel groupoids on a graph

On p-schemes of order p3

On $p$ -schemes of order $p^{3}$