Sign-changing first derivative of positive solutions of forced second-order nonlinear differential equations (CROSBI ID 209940)
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Pašić, Mervan
engleski
Sign-changing first derivative of positive solutions of forced second-order nonlinear differential equations
Some oscillatory phenomena in physics, population, biomedicine and biochemistry are described by positive functions having sign-changing first derivative. Here, it is studied for all positive not necessarily periodic solutions of a large class of second-order nonlinear differential equations. It is based on a new reciprocal principle by which the classic oscillations of corresponding reciprocal linear equation causes the sign-changing first derivative of every positive solution of the main equation.
positive solutions; sign-changing first derivative; periodic force; nonlinear second-order equations
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