Suppose that R is a ring and that a2 = a for all a in R.
Chapter 12, Problem 50E(choose chapter or problem)
Suppose that R is a ring and that \(a^2 = a\) for all a in R. Show that R is commutative. [A ring in which \(a^2 = a\) for all a is called a Boolean ring, in honor of the English mathematician George Boole (1815–1864).]
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer