👉 In mathematics, "eyliad" refers to a specific mathematical concept that is used in combinatorics and graph theory. In graph theory, an eyliad is a type of directed or undirected graph with a special property called "eye-diagram." This property allows the graph to be uniquely represented by a single edge diagram, which is a representation of the graph using only one line. An eyliad can have more than one direction, and it may also be referred to as an