spectral data.

Necessary and Sufficient Conditions for the Solvability of the Inverse Problem for Sturm–Liouville Operators with a Nonintegrable Singularity Inside a Finite Interval

The inverse spectral problem of recovering Sturm–Liouville operators on a finite interval with a nonintegrable Bessel-type singularity

in an interior point from the given spectral data is studied. A corresponding uniqueness theorem is proved, a constructive procedure

for the solution of the inverse problem is provided. Necessary and sufficient conditions for the solvability of the inverse problem are

obtained.