  In this article we present explicit formulae for q-differentiation on quantum
spaces which could be of particular importance in physics, i.e., q-deformed
Minkowski space and q-deformed Euclidean space in three or four dimensions. The
calculations are based on the covariant differential calculus of these quantum
spaces. Furthermore, our formulae can be regarded as a generalization of
Jackson's q-derivative to three and four dimensions.
