The asymptotic behavior of solutions of the odd-order differential equation of Emden-Fowler type x(t) + q(t)|x(t)|sgn x(t) = 0, is studied in the framework of regular variation, under the assumptions… (More)

Sharp conditions are established for the existence of a pair of regularly varying solutions with nonzero indices of half-linear functional differential equations of the type (|x(t)|sgn x(t)) =… (More)

This paper establishes existence of nonoscillatory solutions with specific asymptotic behaviors of second order quasilinear functional differential equations of neutral type. Then sufficient,… (More)

For a certain class of functional dierential equations with perturbations conditions are given such that there exist solutions which converge to solutions of the equations without perturbation. Let ∆… (More)

Accurate asymptotic formulas for regularly varying solutions of the second order half-linear differential equation (|x′|αsgn x′)′ + q(t)|x|sgn x = 0, will be established explicitly, depending on the… (More)