Theory Concerning the Classification of Cycle Based on Hypergraph

In this paper,some problems of hypergraph to which relational schema corresponding are discussed,and the problem of classification is studied.The concepts of quasi-cycle,independent quasi-cycle,basic quasi-cycle,irregular guasi-cycle,regular quasi-cycle,complex quasi-cycle,part re- duplicative quasi-cycle,independent complex quasi-cycle,independent part reduplicative quasi-cycle are proposed.On the basis of this,theory concerned of quasi-cycles such as decomposition and transform of classified cycle is studied.