综述利用半滤子刻画和推广正则语言这一组合半群课题的研究,包括该课题最近的一些进展和结果,同时提出了若干问题。
This paper is devoted to combinatorial semigroups, namely,characterizing and generalizing regular languages by semifilters. Some recent progress and results in this aspect are surveyed. Furthermore, some problems are proposed.