Recovering Higher Order Differential Systems with Regular Singularities on Star-type Graphs

Abstract

We study an inverse spectral problem for arbitrary order ordinary differential equations on compact star-type graphs when differential equations have regular singularities at boundary vertices. As the main spectral characteristics we introduce and study the so-called Weyl-type matrices which are generalizations of the Weyl function (m-function) for the classical Sturm-Liouville operator. We provide a procedure for constructing the solution of the inverse problem and prove its uniqueness.

arXiv comment10 pages. arXiv admin note: text overlap with arXiv:1309.5360 by other authors without attribution