%0 Journal Article %T On Some Properties of Coprime Labelled Graphs %A I. Naci Cang¨šl %A Kinkar Ch. Das %A M. A. Rajan %A V. Lokesha %J Turkish Journal of Analysis and Number Theory %D 2019 %R 10.12691/tjant-7-3-4 %X A is a labelled graph denoted by in which the vertex set of an has vertices labeled {} and edges such that there exist an edge between two distinct vertices labeled { and }, if { and } are coprime to each other. In this paper, some properties of the ER- are studied. An algorithm to compute GCD and LCM of any two numbers between and p by means of an ER- graph is also described %U http://www.sciepub.com/TJANT/abstract/11128