Minimum Steiner tree problem is NP complete problem.

图着色问题是著名的NP-完全问题。

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At first, this thesis introduces the VLSI physical design process, based on this leads to the rectilinear Steiner tree problem.

本文首先介绍了超大规模集成电路的物理设计流程，在此基础上引出直角斯坦纳树问题。

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Finally, this thesis gives the definition of the rectilinear Steiner tree problem in more higher-dimensional space, and the corresponding structure of the minimum convex polyhedron.

最后本文给出了在更高维空间的直角斯坦纳树问题的定义，和相应的最小凸多面体的构造。

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