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  1. No Access

    Article

    Lambda number for the direct product of some family of graphs

    An L(2, 1)-labeling for a graph \(G=(V,E)\) G ...

    Byeong Moon Kim, Yoomi Rho, Byung Chul Song in Journal of Combinatorial Optimization (2017)

  2. No Access

    Article

    \(L(1,1)\) -labelling of the direct product of a complete graph and a cycle

    An \(L(j,k)\) L ( ...

    Byeong Moon Kim, Yoomi Rho, Byung Chul Song in Journal of Combinatorial Optimization (2015)

  3. No Access

    Article

    Minimum orders of eulerian oriented digraphs with given diameter

    A digraph D is oriented if it does not contain 2-cycles. If an oriented digraph D has a directed eulerian path, it is an oriented eulerian digraph. In this paper, when an oriented eulerian digraph D has minimum o...

    Yoomi Rho, Byeong Moon Kim, Woonjae Hwang… in Acta Mathematica Sinica, English Series (2014)