超图有γ环的几个判定定理

Several Judement Theorems about γ-cyclic in Hypergraph

讨论了超图γ环的存在问题。给出了正规环路的概念，同时给出了几个方便实用的γ环存在的判定定理。为讨论无γ环数据库模式的设计奠定了基础。

This paper discusses the existing problem of γ-cyclic in a hypergraph. We give the conception of normal cyclic route. At the same time we give several convenient and availalle theorems about Judgement of a γ-cyclic Hypergraph. It lays the foundation for the design of database scheme without γ-acyclic.