The Subvariety Lattice of the Join of Two Semigroup Varieties  

作　　者：Wen Ting ZHANG Yan Feng LUO 

机构地区：[1]Department of Mathematics, Lanzhou University, Lanzhou 730000, P. R. China

出　　处：《Acta Mathematica Sinica,English Series》2009年第6期971-982,共12页数学学报（英文版）

基　　金：the EYTP of MOE of China,the National Natural Science Foundation of China(No.10571077);the Natural Science Foundation of Gansu Province(3ZS052-A25-017)

摘　　要：The join A ∨ B of two semigroup varieties A and B is investigated. The latrine of subvarieties of A ∨ B is completely described, It is shown that this lattice is finite and non-modular and that all varieties in it are finitely based and finitely generated.The join A ∨ B of two semigroup varieties A and B is investigated. The latrine of subvarieties of A ∨ B is completely described, It is shown that this lattice is finite and non-modular and that all varieties in it are finitely based and finitely generated.

关 键 词：SEMIGROUPS VARIETIES IDENTITIES LATTICE 

分 类 号：O152.7[理学—数学] O152[理学—基础数学]