496 Hardy inequality on time scales a generalized Euler dynamic equation. Those results turn out to be new even in the special linear case. The questions how the graininess of the time scale affects the (non)oscillation of the equation, as well as some other related topics, are also discussed there.Before we present our main result, let us recall some essentials about time scales. In 1988, Hilger [9] introduced the calculus on time scales which unifies continuous and discrete analysis. A time scale T is an arbitrary nonempty closed subset of the real numbers R. We define the forward jump operator σ by σ(t) := inf{s ∈ T : s > t}, and the graininess µ of the time scale T by µ(t) := σ(t) − t. A point t ∈ T is said to be right-dense, rightscattered, if σ(t) = t, σ(t) > t, respectively. We denote f σ := f • σ. For a function f : T → R the delta derivative is defined by f ∆ (t) := lim s→t,σ(s) =t