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[6] contains some theorems on the existence and uniqueness of solutions of singular Cauchy–Nicoletti problems for systems of ordinary differential equations.. We note that
Simeonov, Sufficient con- ditions for oscillation of the solutions of a class of impulsive differential equations with advanced argument.8. Simeonov, Systems with
In the present paper we obtain sufficient conditions for the oscillation of bounded solutions of a class of impulsive differential equations of second order with a constant delay
Doˇ sl´ y, Constants in oscillation theory of higher order Sturm-Liouville differential equations , Electron.. Doˇ sl´ y, Oscillatory properties of fourth order
The oscillation results not only unify the oscillation results of differential and difference equations but also involve the oscillation conditions for different types of equations
Proytcheva, Existence and asymptotic behavior of nonoscillatory solutions of second order neutral differential equations with maxima, J. Bainov, Oscillatory and asymptotic behavior
Arockiasamy, Oscillatory and asymptotic behavior of fourth order nonlinear neutral delay difference equations, Indian J. Arockiasamy, Fourth order nonlinear oscillations of dif-
Initially, the model is extremely simple; we estab- lish its basic behavior as an isolated system, and analyze the interactions of harvest rates (maxi- mum sustained yield
