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- Yan-Quan Feng, Jin Ho Kwak, Kaishun Wang
- Eur. J. Comb.
- 2005

A graph is s-regular if its automorphism group acts regularly on the set of its s-arcs. In this paper, we classify the s-regular elementary Abelian coverings of the three-dimensional hypercube for each s ≥ 1 whose fibre-preserving automorphism subgroups act arc-transitively. This gives a new infinite family of cubic 1-regular graphs, in which the smallest… (More)

- Sungpyo Hong, Jin Ho Kwak, Jaeun Lee
- Discrete Mathematics
- 1996

- Yan-Quan Feng, Jin Ho Kwak
- Journal of Graph Theory
- 2004

- Jin Ho Kwak, Jaeun Lee
- Graphs and Combinatorics
- 1992

- Kun Moo Choi, Hyuk Jai Jang, Jin Ho Kwak, Ji Hoon Kim, Jae Hong Ahn
- Hepato-gastroenterology
- 2014

Laparoscopic cholecystectomy (LC) is the treatment of choice for gallbladder stones. One of the major complications associated with LC is bile duct injury; ligation or cutting of a bile duct can result in significant segmental biliary obstruction with cholangitis or bile leak, which can progress to bile peritonitis or biliary fistula. Most postoperative… (More)

- Jin Ho Kwak, Young Soo Kwon
- Journal of Graph Theory
- 2005

- Jin Ho Kwak, Young Soo Kwon
- J. Comb. Theory, Ser. B
- 2011

A 2-cell embedding of a graph G into a closed (orientable or nonorientable) surface is called regular if its automorphism group acts regularly on the flags mutually incident vertex-edge-face triples. In this paper, we classify the regular embeddings of complete bipartite graphs Kn,n into nonorientable surfaces. Such a regular embedding of Kn,n exists only… (More)

For a given finite connected graph , a group H of automorphisms of and a finite group A, a natural question can be raised as follows: Find all the connected regular coverings of having A as its covering transformation group, on which each automorphism in H can be lifted. In this paper, we investigate the regular coverings with A = Zp , an elementary abelian… (More)

- Jin Ho Kwak, Young Soo Kwon
- Discrete Mathematics
- 2008

- Rongquan Feng, Jin Ho Kwak, Juyoung Kim, Jaeun Lee
- SIAM J. Discrete Math.
- 1998