Int. J. Contemp. Math. Sciences, cilt.3, ss.1331-1335, 2008 (Hakemli Dergi)
In the present paper, we introduce the notion of quasi σ-rigid
rings for an automorphism σ of a ring R. Some properties of a σ-ring R that
has the form R[x; σ, δ] are obtained, for example if R is a quasi-Baer ring then
R[x; σ, δ] is a quasi-Baer ring when R is a quasi σ-rigid ring.