Jantanan, Wichayaporn; Riantaisong, Jakkaphan
(มหาวิทยาลัยราชภัฏบุรีรัมย์, 2019-01-03)
The concept of (m, n) -simple ordered semigroups has been introduced by T.
Changphas (Changphas, 2015, pp. 1-5). Let m, n be nonnegative integers. An ordered
semigroup S is said to be (m, n) -simple if it does not contain ...