REN Miaomiao*, HAN Jin, SHAO Yong
(School of Mathematics, Northwest University, Xi′an 710127, Shaanxi, China)
Abstract:
The ai-semiring varieties of type (2,2,0,0) satisfying x2≈x and xy≈yx are studied.It is shown that the collection of all these varieties forms a three-element chain.Also,each member of this lattice is finitely based.
KeyWords:
ai-semiring variety;lattice of subvarieties;finitely based