0 votes 0 votes A set of odd integers under the operation of multiplication forms A) A group but not abelian group B) A monoid but not group C) Semigroup but not monoid D) Abelian group Set Theory & Algebra group-theory discrete-mathematics + – srestha asked Dec 28, 2017 srestha 1.7k views answer comment Share Follow See all 6 Comments See all 6 6 Comments reply Show 3 previous comments Ashwin Kulkarni commented Dec 28, 2017 reply Follow Share I was about to ask, what is name of set if it is just closed. Thanks @Anu007 I didn't knew the name "Groupoid" 1 votes 1 votes joshi_nitish commented Dec 28, 2017 reply Follow Share if it is just closed, it is also known as 'structure'.. 1 votes 1 votes gari commented Dec 28, 2017 reply Follow Share Closed - Algebric structure, Groupoid, or closure property . 1 votes 1 votes Please log in or register to add a comment.