صندلی اداری

ON THE RESONANT OSCILLATION OF CERTAIN FOURTH ORDER NONLINEAR DIFFERENTIAL EQUATIONS WITH DELAY

S. A. Iyase

Abstract


We prove the existence of periodic solutions for the periodic boundary value problem (1.1) under some resonant conditions on the asymptotic behaviour of $\disp\frac{g(t,y)}{ay}$ for $|y|\rightarrow\infty$.


The uniqueness of periodic solutions is also examined.


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