Fedoseev Alexey Evgen'evich Russia Saratov State University 1, Saratov State University, Russia, 410012, Saratov, Astrahanskaya st., 83 fedoseevae@info.sgu.ru, fedoseev_ae@mail.ru Author's articles Necessary and Sufficient Conditions for the Solvability of the Inverse Problem for Sturm–Liouville Operators with a Nonintegrable Singularity Inside a Finite Interval