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# Article

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Keywords:
second order equation; conjugacy criteria; disconjugacy criteria
Summary:
Conjugacy and disconjugacy criteria are established for the equation $u^{\prime \prime }+p(t)u=0\,,$ where $p:]-\infty ,+\infty [\rightarrow ]-\infty ,+\infty [$ is a locally summable function.
References:
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