Oscillatory criteria for nonlinearnth-order differential equations with quasiderivatives

Sufficient conditions are given for the existence of oscillatory proper solutions of a differential equation with quasiderivativesL_ny=f(t,L₀y, ..., L_n–1y) under the validity of the sign conditionf(t,x₁,...,x_n)x₁0,f(t,0,x₂,...,x_n)=0 on ₊ x ⁿ.