# Article

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Keywords:
oscillation theory
Summary:
In this paper two sequences of oscillation criteria for the self-adjoint second order differential equation $(r(t)u^{\prime }(t))^{\prime }+p(t)u(t)=0$ are derived. One of them deals with the case $\int ^{\infty }\frac{{\mathrm d}t}{r(t)}=\infty$, and the other with the case $\int ^{\infty }\frac{{\mathrm d}t}{r(t)}<\infty$.
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