Subsemigroup of Mn semigroup
YI Bao-lin · Journal of Qinghai Nationalities University · 2010
In this paper we prove that Dn ={A| A be an diagonal matrix}is a subsemigroup of Mn..Dn is *-regular semigroup.Dn is an inverse semigroup.Dn is an union of groups.we prove that Qn={Eij│i=1,2…n;j=1,2…n}∪{0}is subsemigroup of Mn..Qn is *-regular semigroup.Qn is inverse semigroup.