Izvestiya of Saratov University.

Mathematics. Mechanics. Informatics

ISSN 1816-9791 (Print)

ISSN 2541-9005 (Online)

Sturm – Liouville operator

On Inverse Problem for Sturm – Liouville Operator with Discontinuous Coefﬁcients

An Inverse Spectral Problem for Sturm – Liouville Operators with Singular Potentials on Graphs with a Cycle