计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (22): 53-56.

• 研究、探讨 • 上一篇    下一篇

有向图语言

师海忠   

  1. 西北师范大学 数学与信息科学学院,兰州 730070
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-08-01 发布日期:2011-08-01

Digraph languages

SHI Haizhong   

  1. College of Mathematics and Information Science,Northwest Normal University,Lanzhou 730070,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-08-01 Published:2011-08-01

摘要: 经典形式语言有两条主线,就是自动机线索与形式文法线索。利用有向图理论和有向图半群理论建立了另一条线索——有向图语言,讨论了两类特殊的有向图语言——de Bruijn有向图语言和Kautz有向图语言,引入了连通语言及语言的直径等概念,计算出了de Bruijn有向图语言和Kautz有向图语言的直径。

关键词: 形式语言, 有向图, 有向图语言, de Bruijn有向图语言, Kautz有向图语言

Abstract: Research for formal languages have two main lines,automatons and formal grammars.A new line for formal languages,digraph languages is built.Furthermore,two special digraph languages,de Bruijn digraph languages and Kautz digraph languages are discussed.Two concepts,connected languages and diameter of languages are also proposed.The diameters of de Bruijn digraph languages and Kautz digraph languages are computed.

Key words: formal language, digraph, digraph language, de Bruijn digraph language, Kautz digraph language