# Article

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Keywords:
third-order functional differential equation; Euler equation; oscillation; nonoscillation
Summary:
In the paper we offer criteria for oscillation of the third order Euler differential equation with delay $$y'''(t)+\frac {k^2}{t^3}y(ct)=0.$$ We provide detail analysis of the properties of this equation, we fill the gap in the oscillation theory and provide necessary and sufficient conditions for oscillation of equation considered.
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