On the oscillatory properties of certain fourth order nonlinear difference equations

Some new criteria for the oscillation of fourth order nonlinear difference equations of the formΔ(1a3(n)(Δ1a2(n)(Δ1a1(n)(Δx(n))α1)α2)α3)+δq(n)f(x[g(n)])=0, where δ=±1δ=±1 are investigated.