صندلی اداری

OSCILLATORY BEHAVIOUR OF THE SOLUTIONS OF NONLINEAR SECOND ORDER DIFFERENTIAL EQUATIONS WITH RETARDED ARGUMENT DEPENDING ON THE UNKNOWN FUNCTION

N.T. Markova, P.S. Simeonov

Abstract


Sufficient conditions are found for oscillation ofthe solutions of nonlinear second order differential equationswith retarded argument depending on the independent variable aswell as on the unknown function.

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