• Quasipolar Subrings of 3 X 3 Matrix Rings 

      Gurgun, Orhan; Halicioglu, Sait; Harmanci, Abdullah (Sciendo, 2013)
      An element a of a ring R is called quasipolar provided that there exists an idempotent p is an element of R such that p is an element of comm(2)(a), a + p is an element of U(R) and ap is an element of R-qnil. A ring R is ...