Abstract
Let m, k be two fixed positive integers, R a prime ring with the Martindale qoutient ring Q, L a noncommutative Lie ideal of R, and delta a skew derivation of R associated with an automorphism phi, denoted by (delta, phi). If [delta(x), x(m)](k) = 0 for all x is an element of L, then char(R) = 2 and R subset of M-2(F) for some field F.