On nonnegative solutions of a certain boundary value problem for first order linear functional differential equations.
Some notes on oscillation of two-dimensional system of difference equations
Oscillatory properties of solutions to the system of first-order linear difference equations are studied. It can be regarded as a discrete analogy of the linear Hamiltonian system of differential equations. We establish some new conditions, which provide oscillation of the considered system. Obtained results extend and improve, in certain sense, results presented in Opluštil (2011).
Some oscillation criteria for the second-order linear delay differential equation
Some Wintner and Nehari type oscillation criteria are established for the second-order linear delay differential equation.
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