%0 Journal Article %T Improved Approximation of Layout Problems on Random Graphs %A Kevin K. H. Cheung %A Patrick Girardet %J Open Journal of Discrete Mathematics %P 13-30 %@ 2161-7643 %D 2020 %I Scientific Research Publishing %R 10.4236/ojdm.2020.101003 %X Inspired by previous work of Diaz, Petit, Serna, and Trevisan (Approximating layout problems on random graphs, Discrete Mathematics, 235, 2001, 245-253), we show that several well-known graph layout problems are approximable to within a factor arbitrarily close to 1 of the optimal with high probability for random graphs drawn from an Erdös-Renyi distribution with appropriate sparsity conditions using only elementary probabilistic analysis. Moreover, we show that the same results hold for the analogous problems on directed acyclic graphs. %K Graph Arrangements %K Random Graphs %K Approximation Algorithms %K Undirected Graphs %K Directed Acyclic Graphs %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=97768