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== Background and history ==

== Background and history ==

== 背景和历史 ==

== 背景和历史 ==

The study of networks has emerged in diverse disciplines as a means of analyzing complex relational data. The earliest known paper in this field is the famous [[Seven Bridges of Königsberg]] written by [[Leonhard Euler]] in 1736. Euler's mathematical description of vertices and edges was the foundation of [[graph theory]], a branch of mathematics that studies the properties of pairwise relations in a network structure. The field of [[graph theory]] continued to develop and found applications in chemistry (Sylvester, 1878).

The study of networks has emerged in diverse disciplines as a means of analyzing complex relational data. The earliest known paper in this field is the famous [[Seven Bridges of Königsberg]] written by [[Leonhard Euler]] in 1736. Euler's mathematical description of vertices and edges was the foundation of [[graph theory]], a branch of mathematics that studies the properties of pairwise relations in a network structure. The field of [[graph theory]] continued to develop and found applications in chemistry (Sylvester, 1878).