# Article

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Keywords:
Nehari-type oscillation criteria; conjugate points; self-adjoint equation; principal solution
Summary:
Oscillation criteria of Nehari-type for the equation $(-1)^n(x^{\alpha}y^{(n)})^{(n)} + q(x)y = 0$, $\alpha\in {\bold R}$, are established. These criteria impose no sign restriction on the function $q(x)$ and generalize some recent results of the second author.
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