3 votes 3 votes Every element $a$ of some ring $(R, +, o)$ satisfies the equation $a\;o\;a=a$. Decide whether or not the ring is commutative. Set Theory & Algebra gate1994 set-theory&algebra ring normal out-of-gate-syllabus descriptive + – Kathleen asked Oct 5, 2014 recategorized Apr 25, 2021 by Lakshman Bhaiya Kathleen 540 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.