Abstract
ABSTRACT Let be a finite preordered set, R a 2-torsion free commutative ring with unity and the incidence algebra of X over R. In this paper we prove that every nonlinear Lie derivation of is of the standard form. More explicitly, each nonlinear Lie derivation of is a sum of an inner derivation, a transitive induced derivation, an additive induced derivation and a central-valued map.
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