摘要In the paper [1] the upgrade of the structure of groups has been considered, in which the concept of HX group has been raised. In this paper we will discuss the direct product of HX groups and AX groups on direct product group.
3MI Hong-hai,YAN Guang-xia (School of Science, Hebei University of Technology, Tianjin 30 0130, China).The Properties of the Hyper Relation R_i[J].Chinese Quarterly Journal of Mathematics,2003,18(3):297-301.
