JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) ›› 2019, Vol. 54 ›› Issue (6): 8-10.doi: 10.6040/j.issn.1671-9352.0.2019.173

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Some notes on infix chains ——several studies on combinatorial semigroups(Ⅱ)

LENG Jing, GUO Yu-qi*   

  1. School of Mathematics and Statistics, Lanzhou University, Lanzhou 730000, Gansu, China
  • Published:2019-06-05

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Abstract: Some notes on infix chains and a characterization of completely dense languages are given in this paper.

Key words: infix chains, infix codes, completely dense languages

CLC Number: 

  • O157.4
[1] SHYR H J. Free monoids and languages[M]. 3rd. [S.l.] : Hon Min Book Company, 2001.
[2] PARADIS A D, SHYR H J, THIERRIN G. Quasi-disjunctive languages[J]. Soochow Journal of Math, 1982, 8:151-161.
[3] YU S S, JIANG S W, SHRY H J. Completely disjunctive languages[J]. Periodica Polytechnica Transportation Engineering, 1991, 19(1/2):101-110.
[1] WANG Shou-feng. A generalization of infix codes [J]. J4, 2013, 48(8): 34-35.
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