@article{А.Sh. Shaldanbayev_A.B. Imanbayeva_A.Zh. Beisebayeva_А.А. Shaldanbayeva_2019, title={ON THE SQUARE ROOT OF THE OPERATOR OF STURM-LIOUVILLE FOURTH-ORDER}, url={https://journals.nauka-nanrk.kz/physics-mathematics/article/view/1637}, abstractNote={<p>In the present work found the root of the positive operator of the Sturm - Liouville problem of the<br>fourth order, which is invertible composition operator of the Sturm - Liouville problem and its adjoint. The found<br>root does not possess the property of positivity, but is a self-adjoint operator in the essential. One theorem of Putnam<br>of algebraic character is used as a leading idea. It is hoped that the results will find applications in spectral operator<br>theory and theoretical physics.</p>}, number={3}, journal={Известия НАН РК. Серия физико-математическая}, author={А.Sh. Shaldanbayev and A.B. Imanbayeva and A.Zh. Beisebayeva and А.А. Shaldanbayeva}, year={2019}, month={июн.}, pages={85–96} }