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Derivations with Engel conditions in prime and semiprime rings

Shuliang Huang (2011)

Czechoslovak Mathematical Journal

Let R be a prime ring, I a nonzero ideal of R , d a derivation of R and m , n fixed positive integers. (i) If ( d [ x , y ] ) m = [ x , y ] n for all x , y I , then R is commutative. (ii) If Char R 2 and [ d ( x ) , d ( y ) ] m = [ x , y ] n for all x , y I , then R is commutative. Moreover, we also examine the case when R is a semiprime ring.

Derivations with power central values on Lie ideals in prime rings

Basudeb Dhara, Rajendra K. Sharma (2008)

Czechoslovak Mathematical Journal

Let R be a prime ring of char R 2 with a nonzero derivation d and let U be its noncentral Lie ideal. If for some fixed integers n 1 0 , n 2 0 , n 3 0 , ( u n 1 [ d ( u ) , u ] u n 2 ) n 3 Z ( R ) for all u U , then R satisfies S 4 , the standard identity in four variables.

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