Linearization of coupled second-order nonlinear ordinary differential equations (SNODEs) is one of the open and challenging problems in the theory of differential equations. In this paper, we describe ...
Recently, Bobisud, Proc. Amer. Math. Soc. 23 (1969), 501-505, has discussed the oscillatory behavior of solutions of y" + a(t)f(y) = 0. The purpose of this paper is to prove Bobisud's theorems under ...
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