TERNARY BANACH ALGEBRA l1(S) AND APPROXIMATE IDENTITY

Let S be a ternary semigroup. In this article, we construct the ternary Banach algebra l1(S). Also, for commutative ternary semigroup S, if S does not contain proper pair relative units, and l1(S) has an approximate identity fe(¸)g¸2¤, then S has a finite set of relative units