应用广泛的“二元关系”图论中很多问题,开始往往以数学游戏的形式出现,加以研究,然后又得到多方面的应用,今天,图论已广泛应用于物理、化学、计算机科学、通讯技术、交通运输、运筹学等各个领域中,前面提到过的,欧拉研究的“七桥问题”和哈密尔顿提出的“周游世界问题”,便发展成为现今颇有实用价值的旅行售货员问题和中国邮路 Many problems in the widely used “binary relationship” graph theory have often appeared in the form of mathematical games, studied, and then applied in many ways. Today, graph theory has been widely used in physics, chemistry, computer science, and communications. In various fields such as technology, transportation, and operations research, as mentioned earlier, Euler’s “seven-bridge problem” and Hamilton’s “traveling around the world” have developed into a problem for today’s travel saleswoman with practical value. China Postal Road