Geodesic
On the number of real eigenvalues of a certain boundary-value problem for a second-order equation with fractional derivative
Fundamentalʹnaâ i prikladnaâ matematika, Tome 12 (2006) no. 6, pp. 137-155 
A. Yu. Popov. On the number of real eigenvalues of a certain boundary-value problem for a second-order equation with fractional derivative. Fundamentalʹnaâ i prikladnaâ matematika, Tome 12 (2006) no. 6, pp. 137-155. http://geodesic.mathdoc.fr/item/FPM_2006_12_6_a8/
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Voir la notice de l'article provenant de la source Math-Net.Ru

The asymptotics as $\alpha\to0+$ of the number of real eigenvalues $\lambda_n(\alpha)$ of the problem $y''(x)+\lambda D_{0}^{\alpha}y(x)=0$, $0$, $y(0)=y(1)=0$, is found. The minimization of real eigenvalues was carried out. It is proved that $\lim\limits_{\alpha\to0+}\lambda_n(\alpha)=(\pi n)^2$.

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