图的不可收缩性和end-正则性 (英文)

Unretractivity and End-Regularity of a Graph

英文关键词:endomorphism monoid  regularity  unretractivity.

中文摘要:

      图的半群理论是图的群理论的延伸．图的不可收缩性和end－正则性是其中受到普遍关注的课题．本文揭示了两者之间的内在联系．

英文摘要:

      In this paper, a relationship among unretractivity, E-H-unretractivity andend-regularity of a graph is described.