本文系统、深入地研究了LSI/VLSI自动布图设计中的群法问题.引入了一系列新的概念:如稳定群、稳定群的级、绝对封闭群等.得出并证明了稳定群的一些重要性质.本文认为,历史上群法中一种非常重要的评价参量,群强度,是不可靠的,并成功地用稳定群代替.用本群法得到的结果与历史上典型群法得到的结果进行比较,结论是非常令人满意的. This dissertation systematically and deeply studies the group law problem in the LSI / VLSI automatic layout design and introduces a series of new concepts such as stable group, stable group level, absolute closed group, etc. The stable group Some important properties.This paper argues that in history, a very important evaluation of group parameters, group strength, is not reliable, and successfully replaced by the stable group.The results obtained by the method of this group and the history of the typical group method obtained The results are compared, the conclusion is very satisfactory.